shehzadirani

Sun-Powered textiles

2017-02-01T12:04:00.001+05:30

Fabrics with self-cleaning properties can last longer, require less maintenance and even reduce air pollution.

Sunlight can damage many types of fabrics, yet it can also have a beneficial effect on textiles that are enhanced with self-cleaning technologies. Thanks to functional coatings and pioneering research, self-cleaning properties—powered by the sun—are extending the life of textiles and decreasing maintenance costs.

CHEMISTRY BASICS

Self-cleaning textiles are basically functionalized textiles either due to chemistry or innate biology. The hydrophilic self-cleaning coatings are based on photocatalysis: when exposed to light, they are able to break down impurities.

Two kinds of self-cleaning textiles are available. The first core technology is considered anti-stick or hydrophobic, and this type is often called antimicrobial, according to Reinhard Liu, operations manager at TitanPE Technologies Inc., a leading nano photocatalyst maker and the first hydro-synthetic photocatalyst manufacturer in Shanghai, China.

AT&T Stadium, home of the Dallas Cowboys in Arlington, Texas, features 19,000m2 of SHEERFILL® I with EverClean® Topcoat on the retractable portion of the roof. Photo: Saint-Gobain.

Liu explains that with this first type of technology, the goal is to develop textiles that do not allow pollutants to stick to the textile. “There are several chemicals that can do this in the world,” Liu says. “This technology is a dirt repellent, not ‘self-cleaning.’” The goal is to prevent dirt and microbial elements from sticking to and “dirtying” textiles and interior or exterior applications.

The second type of technology is hydrophilic and photocatalytic. “In this type of technology, we want the textile to have hydrophilic features, so we can clean it by water, even without using a cleaning agent,” Liu says. “The photocatalytic component can help decompose organics on the textile under the sun. This technology is actually self-cleaning, because we use rain and water to clean it automatically.”

TitanPE has some commercial anti-stick products, but the company’s major R&D is focused on hydrophilic and photocatalytic technology. Called TiPE™ self-cleaning nano coat, the special nano photocatalyst technology can be applied to the exterior of buildings to prevent mold, moss or dirt buildup. The coating can also improve the air around the building by purifying nitrogen oxide (NOx) generated by passing automobiles.

THE HYDROPHILICITY FEATURE

Detergents and cleaning agents reduce the surface tension of water and lower the contact angle on fabric surfaces. TitanPE Technology calls it the hydrophilicity feature. TiPE nano coat’s hydrophilicity will simulate this feature, so that a single water wash on the surface can achieve the same effect as a traditional cleaning with detergent.

The Lampton Shopping Center in Thailand features a PVC-coated fabric display coated with photocatalyst. Photo: Taiyo Kogyo Corp.

According to Liu, when the surface of nano-level photocatalytic film is exposed to light, the contact angle of the photocatalyst surface with water is reduced gradually. As explained in the TiPE nano coat self-cleaning application manual, after enough exposure to light, the surface reaches super-hydrophilicity. In other words, it does not repel water at all, so water cannot exist in the shape of a drop, but spreads flatly on the substrate. The hydrophilic nature of titanium dioxide (TiO2), coupled with gravity, will enable the dust particles to be swept away following the water stream (rain), creating the key feature of self-cleaning and easy-cleaning.

“Our self-cleaning technology has been used on buildings for several years, with many clients using water/oil repellent technology first and then turning to us,” Liu says. “But for textiles, it is just a beginning. Water- and oil-repellent technology is still much higher in sales, but we are pushing it to change.”

Evidence shows the older hydrophobic treatment chemicals to be harmful to the environment, Liu notes. “We want to use a safe and long-lived technology to develop a new commercial market. It needs to be safe, healthy, environmentally friendly and also inexpensive,” he says.

The first PVC-coated fabric with TiO2 was developed by Taiyo Kogyo Corp., Osaka, Japan, in 1997. Taiyo Kogyo has been selling the products commercially since 1998. Other companies also sell hydrophobic and anti-stick products, including 3M, St. Paul, Minn., and Daikin Industries Ltd., Osaka, Japan.

Liu says, “For the hydrophilic/ photocatalytic market, it is just in the beginning.” TitanPE is a leading researcher in the area, but Liu adds that much research is happening in the U.S., which includes activity at universities and some pioneering companies.

LET THERE BE UV

A PVC-coated fabric with a double-layered structure.According to Dr. Hiroshi Toyoda of the Technical Research Center at Taiyo Kogyo Corp., TiO2 photocatalytic coating technology for the PVC-coated fabric shows excellent self-cleaning effects on its surface under irradiation by UV light.

“One is the oxidative decomposition reaction of organic contaminants triggered by the redox reaction of TiO2, and the other is hydrophilic property induced by UV light, whereby UV irradiation on TiO2 produces hydrophilic groups (OH groups) on the surface of TiO2 and makes the surface hydrophilic and thus gives the surface high wettability,” Toyoda says.

The hydrophilic effect allows natural rain to wash off dirt from the surface. The TiO2 top coating solution was prepared by anatase titanium dioxide crystals and is bound with an inorganic binder that largely increases the adhesion strength to the substrate.

According to Toyoda, because the fabric with TiO2 stays cleaner than traditional architectural fabrics, cleaning fees can be reduced and the translucency stays high, minimizing the need for further artificial lighting, which in the end will reduce energy costs for the owner.

FINDING THE RIGHT MIX

At the 2005 World Exposition in Aichi, Japan, the “Mountain of Dreams” display

featured a PVC-coated fabric with TiO2 coating. Photo: Taiyo Kogyo Corp. An example of this coating technology is Saint-Gobain’s Sheerfill® architectural membranes, which stay clean, white and bright even in very challenging environments. The fact that the fluoropolymer coating is easily rinsed clean by rain or plain water ensures a long service life with little regular maintenance, according to Michael Lussier, architectural sales and market manager at Saint-Gobain, Malvern, Pa.

“When our EverClean® Photocatalytic Topcoat was introduced to the market, our ‘easily cleaned’ coating became truly ‘self-cleaning,’” Lussier says. “By adding photocatalytic titanium dioxide to the topcoat, and simply exposing the material to sunlight—which is easy to do on a roof—a layer of activated oxygen forms at the surface, helping to reduce NOx pollution and breaking down organic contaminants. Since the TiO2 is a catalyst, it is not consumed in any of the reactions and remains available to provide the self-cleaning properties for the life of the membrane. Saint-Gobain has invested significant time, effort and money into applying the technology to our specific products.”

Lussier says that eliminating surface dirt on architectural structures is paramount, so when UV light hits the EverClean photocatalytic TiO2-based surface, hydroxy radicals (.OH) and superoxide radicals (O2-) oxidize(decompose) allorganicsubstances. Rain or water washes them away, keeping Saint-Gobain’s Sheerfill surfaces white. Maintenance cleaning is eliminated, as is the use of environmentally deleterious cleaning agents.

“The TiO2 layer is required for the PVC-coated fabric, which is used for the self-cleaning application,” Toyoda says. “It should be provided with a high photo-redox reaction ability to eliminate an oily plasticizer which migrates to the outermost surface.”

Canada Harbor Place in Vancouver, British Columbia, contains 10,000m2 of SHEERFILL® II with EverClean®. Photo: Saint-Gobain.

Saint-Gobain is one of the market leaders with respect to self-cleaning permanent architectural membranes. The company partnered with TOTO Ltd., Kitakyushu, Fukuoka Prefecture, Japan, in the development of the EverClean Photocatalytic Topcoat product; TOTO is a technical leader in the use of photocatalysts across a wide variety of products and materials.

As Lussier explains, the process of coating polytetrafluoroethylene (PTFE) onto fiberglass requires very high processing temperatures. “Finding the right TiO2 that is compatible with our materials and our processing was very challenging,” Lussier says. “It is not enough to simply add ‘TiO2’ to the coating—only the right TiO2, added in the optimum ratio, applied in the optimum manner, will provide the desired performance.”

It’s important to note that PTFE is unaffected by UV and virtually all chemicals and pollutants; the PTFE coating provides protection of the underlying fiberglass fabric, which is strong and unaffected by UV.

Adding catalytic, nano metal oxide particles to obtain self-detoxifying filter substrates is an area of focus at the Nonwovens and Advanced Materials Laboratory at Texas Tech University (TTU), Lubbock, Texas, according to Seshadri Ramkumar, Ph.D. Ramkumar is a professor at TTU’s Institute of Environment and Human Health.

“While conducting this study, we observed self-assembly phenomenon in PU nano fibers, which mimicked honeycomb structures,” Ramkumar says. “These provide more surface area and hence can be better filter substrates.”

HANDLING AND CARE

Compared to other materials that do not provide the same performance with regard to lifetime, fire safety and low maintenance needs, Sheerfill does require a different approach with fabrication and installation. Fabricators, architects, designers and owners need to understand the unique properties of the material and how to utilize it to its full potential.

The purpose of self-releasing properties of interior and exterior textiles is to minimize or completely eliminate the need for ongoing care and maintenance of these textiles and coatings. With the EverClean topcoat, cleaning will seldom be needed. When cleaning is necessary, Saint-Gobain provides simple guidelines that include using water, mild pure soap and a soft brush.

ON THE HORIZON

As Liu explains, if we look at the “real” self-cleaning aspect of textiles, from hydrophilic and photocatalytic perspectives, the current commercialization of these textiles is still on a small scale.

“We are doing some commercializing of projects for this, but it is still on a very small scale—compared to first direction hydrophobic products in the moment, but it has a big potential. After all, it will provide extra bio-pollutant control ability, which traditional self-cleaning— hydrophobic—can’t. It will allow real self-cleaning applications in hospitals, for example,” Liu says.

Continueddevelopmentsareexpanding. For instance, Saint-Gobain is developing new products to address the evolving needs of the market. These needs include the use of colors, materials with higher light transmission, mesh fabrics for shading and facades and the desire to be “green,” all while maintaining or improving the aesthetics of the final structure and providing comfort for the occupants and users.

“There is good scope for the field,” Ramkumar says. “However, one has to look into cost benefit analysis. If we are targeting consumer textiles, cost also plays an important role. End users get a value-added product. Fabricators develop new lines of value added and high performance products. But, that said, the industry has to be always cognizant of the cost factor.”

Liu predicts strong interest in further commercializing the application for building textiles, air purification and water treatment to remove harmful chemicals.

“There will be increased growth in self-cleaning textiles for use in hospitals to help control bacteria, super bugs, mutant viruses without using heavy metal,” Liu says. “There will also be further development in textiles for strong active smell control ability—to remove smoke, human body smell, sweat smell.”

Future focus will be on biomimicry, wearables and sustainable products, according to Ramkumar. He notes that the advanced fabrics industry needs “to look outside the box and borrow ideas happening in non-textile and allied fields.” For example, developing porous textiles using the supercritical fluid concept.

“While current products focus on the photocatalysis triggered by UV light, we are developing novel photocatalysis that can be triggered by visible and infrared light,” Toyoda says. “This may provide further benefits to the current technology in order to find new applications.”

The terms used within the self-cleaning textile industry are numerous. Some of the key terms to know include:

Bioactive textile: Contains an active substance with a permanently antimicrobial effect.
Photocatalysis: The acceleration of a photoreaction in the presence of a catalyst. In catalyzed photolysis, light is absorbed by an adsorbed substrate.
Nanotextiles: Textiles engineered with small particles that give ordinary materials advantageous properties.
ETFE coated: Ethylene tetrafluoroethylene (ETFE) is a fluorocarbon-based polymer designed to have high corrosion resistance and strength over a wide temperature range.
Lotus effect: Self-cleaning properties that are a result of ultra-hydrophobicity; dirt particles are picked up by water droplets due to the micro- and nanoscopic architecture on the surface, which minimizes the droplet’s adhesion to that surface.

// re-blogged from https://goo.gl/4FUVzH //

Can we generate electricity by under-water Kites?

2014-07-11T10:35:00.001+05:30

It has been around for quite some time - the fact that one can generate electricity using kites and balloons, but can we really generate it with underwater kites rather than the prevalent turbulent currents?

There are some fascinating proposals already for power generation using tethered kites and balloons... Why not indeed, because that is exactly what two independent teams of researchers are doing, one from Minesto, Sweden and the other from Worcester Polytechnic Institute, USA [Source: Discovery News].

A Massachusetts research program just got a nice big grant from the National Science Foundation to work on harnessing ocean currents and tidal flows using underwater kites. The potential: Power equal to about 10 nuclear power plants.

This kite-flying dream is being led by David Olinger, an associate professor of mechanical engineering at Worcester Polytechnic Institute specializing in wind and wave turbines. In the past, he and his students developed a very inexpensive kite-powered water pump for developing nations. Now he’s looking to create small tethered, undersea kites that can “fly” quickly in currents. The NSF recently awarded Olinger’s new research program $300,000.

Olinger cited the Gulf Stream, the massive underwater current flowing from the Gulf of Mexico into the Atlantic Ocean. That power potential is estimated at about 20 gigawatts, or about 10 nuclear power plants. ”Just as wind turbines can convert moving air into electricity, there is the potential to transform these virtually untapped liquid ‘breezes’ into vast amounts of power”.

Olinger’s system has similarities to the underwater kites designed by the Swedish company Minesto. However, Minesto plans to tether the kites to the ocean floor while Olinger’s group would attach them to a floating system. Each Minesto’s kite also has a wind turbine attached while Olinger will look at potentially removing the turbine and placing the electrical generator on the floating platform instead.

Just as traditional kites use air currents to generate lift, underwater kites use water currents to generate hydrodynamic lift. The tethered motion of the underwater kite generates electricity as water flows through an attached ducted turbine.

Water currents tend to be much more reliable and predictable than air currents so the expectation is that using water currents to generate electricity should be a more dependable power source. Also, given that water is approximately 800 times denser than air, the underwater kites can be much more compact for a similar power output compared to airborne kites. On the downside, water tends to be a hostile environment for machinery (especially metals). Also water is a relatively good conductor, so extra precautions are necessary for transmitting electricity...

The King's Cross - what a PPP project can be.

2014-02-04T15:48:00.002+05:30

While Mumbai's Chatrapati Shivaji Station and Mumbai Central remains the depressing mess it has always been for half a century, with the minimal eye-wash we call "development" such as the Hafez Contractor's attempt at grilling sweaty mumbai travellers on a spit under a leaky polycarbonate concept that doesn't follow the gothic nor Pompidou, Londoners now travel with comparative ease beneath the white-painted steel tubes rising in a half-dome at King’s Cross Station.

The new roof is a contemporary engineering spectacle, yet very much in the spirit of London’s great Victorian iron-and- glass rail extravaganzas. It just goes to show that the railway (though much of it already shed its mass by getting sold to the public) is still very much vibrant in its responses to travellers needs and comfort in transport is still a very big public issue. It is the inspired solution to expanding King’s Cross when a tangle of crisscrossing Tube lines seemed to leave no place to grow.

As mumbai keeps sinking hundreds of crores into middlemen and supposedly widening, refurbishment and improvement of some corridors and making new entrances -- it barely is a Band-Aid for an area mobbed by over million passengers every day. Monsoons make it worse, and the summers destroy the commuter's morale.

It’s worth having a look at how the elegant $880 million Western Concourse of the 1852 King’s Cross depot addresses so many challenges for just its 150,000 daily passengers. It is also worthy to look at the means employed, the elegance, the sincerity of addressal of all problems collectively and sustainably.

Architect John McAslan & Partners, working with the engineering firm Arup, faced two problems. To simplify connections between the train and six Tube lines, the new Western Concourse had to be built on the west side of the old station. That meant placing it above a new London Underground Ltd. ticketing concourse, which had been built without room to place supports for the latest addition.

Elegance

McAslan and Arup found an elegant solution for the support problem, placing 17 massive piers outside the box of the London Underground concourse. Atop them they set the semicircle of crisscrossing steel tubes that rises 66 feet in a tall funnel shape with a 230-foot radius.

The diagonal-grid construction looks lightweight and seems to settle gently upon the piers. It triples passenger accommodation, according to information provided by the project. Under the spreading roof, McAslan tucked a mezzanine where cafes offer nice views of the pulsing flow of passengers below.

The location of the new concourse, well away from the frontage on busy Euston Road, would strike us as odd until you understand that it puts passengers a short walk to connections at the adjacent St. Pancras station, rather than unload them all out into a mess.

Simultaneously, Foster & Partners built an elegantly functional light- filled shed behind St. Pancras in 2007, to cover platforms extended to accommodate Eurotunnel trains, regional-rail lines and long-distance trains operated by Network Rail.

Method

The transformation of King’s Cross Station for Network Rail involves three very different styles of architecture: re-use, restoration and new build. The train shed and range buildings have been adapted and re-used, the station’s previously obscured Grade I listed façade was precisely restored, and a new, highly expressive Western Concourse has been designed as a centrepiece and the ‘beating heart’ of the project. When the station opened to the public on 19 March 2012, King’s Cross became a new, iconic architectural gateway to the city, ready for the 2012 London Olympics. The design re-orientates the station to the west, creating significant operational improvements and reveals the main south façade of Lewis Cubitt’s original 1852 station.

Although the Western Concourse is probably the most visually striking change to the station, JMP’s work on the project also involved a series of layered interventions and restorations including the restoration of the Eastern Range building and the revitalisation of the Main Train Shed, Suburban Train Shed and Western Range buildings.

WESTERN CONCOURSE

The centrepiece of the £500m redevelopment is the new vaulted, semi-circular concourse to the west of the existing station. The concourse rises some 20m and spans the full 150m-length of the existing Grade I Listed Western Range, creating a new entrance to the station through the south end of the structure and at mezzanine level to the northern end of the Western Concourse, thereby at 7,500sqm the concourse has become Europe’s largest single-span station structure, comprising of 16 steel tree form columns that radiate from an expressive, tapered central funnel. The graceful circularity of the concourse echoes the form of the neighbouring Great Northern Hotel, with the ground floor of the hotel providing access to the concourse.

The Western Concourse sits adjacent to the façade of the Western Range, clearly revealing the restored brickwork and masonry of the original station. From this dramatic interior space, passengers access the platforms either through the ground level gate-lines in the Ticket Hall via the Western Range building, or by using the mezzanine level gate-line, which leads onto the new cross–platform footbridge.

Located above the new London Underground northern ticketing hall, and with retail elements at mezzanine level, the concourse will transform passenger facilities, whilst also enhancing links to the London Underground, and bus, taxi and train connections at St Pancras.

The concourse is set to become an architectural gateway to the King’s Cross Central mixed-use developments, a key approach to the eastern entrance of St Pancras International. It will also act as an extension to King’s Cross Square, a new plaza that will be formed between the station’s southern façade and Euston Road.

MAIN TRAIN SHED

The station’s Main Train Shed is 250m long, 22m high and 65m wide, spanning eight platforms. The restoration includes revealing the bold architecture of the original south façade, re-glazing the north and south gables and refurbishing platforms The two barrel-vaulted roofs are refurbished and lined with energy-saving photo-voltaic arrays along the linear roof lanterns, while a new glass footbridge designed by JMP extends across the Main Train Shed, replacing the old mid-shed Handyside bridge and giving access to every platform as well as the mezzanine level of the concourse.

JMP’s design integrates the main and suburban train sheds for the first time, creating a completely coherent ground-plan for passenger movements into and through the station. Improvements to the Suburban Train Shed located to the north of the Western Concourse and Western Range buildings have enhanced the operation of its three platforms (the busiest in the station during peak-hours).

Read more about the plan and the vision in this document.

The Story of 99 Failures - Tokyo University Digital Fabrication Lab

2014-02-04T15:05:00.000+05:30

Blogging after a year is a shameful aspect for any blogger. But to tell you the truth, a 3 year old and new employees and teaching and office and travelling and a hell of a lot amount of laziness never leaves enough time to write and update a blog. Which more often than not has to do with laziness and a tad bit of too much Facebook.

Well this time's article has to do with a student - teacher - professional collaboration of the types we seldom see, and would be a treat to see it more often and in more ways. This was a extension and expansion of the 1st year master studio project of Obuchi Lab, the University of Tokyo, as collaborative research with Obayashi Corporation.

The objectives were to examine experimental design/ fabrication/ assembly/ construction processes which cannot be done solely by either a school or a professional practice and to explore possibilities related to the production of a new set of “problems” which could act as a catalyst for innovative architectural design research. Hence the name of the project - "99 failures"

“99 Failures” can be interpreted as “Ninety Nine Research Agenda Items”. One of the ultimate goals was to produce a pavilion that would introduce a new set of problems which students, researchers, and professional architects could share and pursue to expand the architectural discourse.

The global geometry of the pavilion was determined through a combination of digital simulations and a series of scale model tests. Digitally, roughly 50 variations of different possible geometries that would allow the structure to unfold into a flat plane were tested which would work as a stable structure when formed into the target shape.

A geometry which fulfilled this technical requirement and gave the opportunity to provide an interesting spatial quality both inside and outside the pavilion.

Working back and forth between digital and physical assembly simulations and finely calibrating the structural/unfolding performance of the final target geometry, they used very thin stainless steel sheets for the compressive components to achieve a super lightweight structure.

The components were fabricated like inflated metal “pillows”; each component was composed of three metal sheet layers. The middle sheet was the thickest of the sheets to give extra stiffness. All of the component edges were welded together and sealed, thus making the inflation process possible while also ensuring each component was watertight. The components were hydraulically inflated to act as a compressive structural element.

255 unique compressive components were all networked to work as a coherent, integrated structural system. Their shapes were drawn in a program which we custom-created solely for this project.

Amongst other factors, the following were considered when designing the shapes of components:

1) Geometrical constraints due to global composition

2) Coordination between components to avoid undesirable overlap/conflicts between components (both when completed and when hung)

3) Compatibility with welding jigs when fabricated with a robot arm

4) Secure capability to be inflated with hydraulic pressure (which directly influences structural performance of component)

5) Maximum porosity (as a pavilion) to allow light and minimize loading from wind pressure.

Polyhedral Meshes Improve CFD

2013-02-18T11:23:00.000+05:30

Polygon Surface Mesh vs Triangle Surface Mesh

Converting a tetrahedral mesh to a dual mesh will:

Reduce the number of volume elements
Increase the size of each volume element
Increase the number of faces (cell neighbors) per volume element

The increased element size and increased number of neighbors per element proves to be a significant benefit. If you compare the results from a tetrahedral mesh to the results from a dual mesh with the same number of cells, then the dual mesh will in general:

Converge faster with fewer iterations
Converge more reliably to lower residual values
Produce results with higher accuracy

The next release of the Caedium CFD software system will provide an option to automatically convert a RANS Flow volume mesh to a polyhedral mesh - also known as a dual mesh. Solving the RANS equations on the dual mesh compared to the equivalent tetrahedral mesh typically leads to higher accuracy results with both faster and more reliable convergence.

Polyhedral Volume Mesh Slice

Tetrahedral Volume Mesh Slice

(re-posted from the CAEDIUM blog)

Assembly One Pavilion / Yale School of Architecture Students

2012-12-20T16:56:00.000+05:30

The Yale ‘Assembly One’ pavilion is the younger, smaller, more carefree sister to Yale’s building project – a 40-year old tradition in which first-year students design and building a house. It is the product of a seminar and design studio in which students focused on alternative ways in which contemporary buildings can come together and the potential architectural effects computational and material techniques can offer. The ‘Assembly One’ pavilion is designed to act as an information center for New Haven’s summer International Festival of Arts and Ideas and therefore was developed with the following characteristics in mind: dynamism, visual transparency and visual density.

Dynamism: The structure is suited to a performance festival – solid and massive from one angle, lightweight and almost entirely porous from another, it alternately hides and reveals its contents.

Visual Transparency: Constructed from thin aluminum sheets, the pavilion opens up on two sides for ventilation and security, focusing views toward the festival’s main stage.

Visual Density: Over 1000 panels create shifting effects of reflection and color as visitors move around the pavilion, creating less of a timeless image of shelter than an unstable, engaging heart of the festival.

“We treated the tenets of digital fabrication as basic assumptions – our ability to efficiently produce variable and unique components and the cultural implications of moving beyond standardized manufacturing. But, we were less concerned with the uniqueness of the objects we created than on the novel types of tectonic expression they allowed.”The Festival Pavilion was designed and built by Yale School of Architecture students.

Project Founders: David Bench, Zac Heaps, Jacqueline Ho, Eric Zahn

Project Managers: Jacqueline Ho, Amy Mielke

Design & Fabrication: John Taylor Bachman, Nicholas Hunt, Seema Kairam, John Lacy, Veer Nanavatty

Design: Rob Bundy, Raven Hardison, Matt Hettler

Faculty advisor: Brennan Buck

Assistant: Teoman Ayas

Consultant: Matthew Clark of Arup, New York

Generous support was provided by Assa Abloy, the Yale Graduate and Professional Student Senate, and the Yale School of Architecture. The Pavilion is on view on the New Haven Green until the end of June.

Mach 3 bubble shock waves

2012-12-03T12:52:00.000+05:30

The best way to recover from a week of overeating, movie watching and napping? Is to sit back and watch some cool physics videos.

We have another featured video from last week's Division of Fluid Dynamics Meeting in San Diego, CA.

The video below shows what happens when a Mach 3 shockwave slams into a helium bubble. Researchers needed a supercomputer cluster to simulate the phenomenon, revealing how density and vorticity (more on that after the jump) evolve during the process.

Video Credit: Babak Hejazialhosseini, Diego Rossinelli and Petros Koumoutsakos from the Computational Science and Engineering Laboratory, ETH Zurich, Switzerland

Simulations in the video focus on two key physical qualities: density and vorticity. Density, as you're probably aware, is simply the amount of mass per unit of volume. In the video, the high density regions are orange whereas the low density areas are blue.

Vorticity, however, is not quite as simple. Vorticity represents how a fluid is rotating at a specific point, and it has similarities to angular momentum. Vorticity has both a magnitude (or length) and a direction.

In the video, the researchers show the strength (magnitude) of vorticity at the various points, but not its direction. If they showed the direction at each point, there'd be a ton of tiny arrows pointing in a variety of directions.

With the aid of these simulations, researchers can learn the complex dynamics behind the shockwave's propagation. But what's the point of looking at these shockwaves, aside from making awesome videos?

One technique cited in the video, shockwave lithotripsy, could benefit from this research. For this medical procedure, doctors direct shockwaves to shatter kidney or bladder stones into many smaller pieces. Now that's my kind of treatment.

Posted by Hyperspace

Catalan Free-form Vault design from ETH Zurich

2012-11-22T21:26:00.000+05:30

A stunning Catalan free-form vault has been designed and build by students during a one week workshop organised by Prof. Deplazes and Prof. Block from ETH Zurich. RhinoVAULT has been used for the design of the complex compression-only shape. For details, visit the homepage of the BLOCK Research Group.

Tutorial for flow over a doubly curved surface

2012-10-16T16:08:00.005+05:30

To simulate an incompressible, steady-state, turbulent flow over a double-sided membrane. View velocity vectors, velocity magnitude color maps, monitor lift and drag forces, and export results for ixForten 4000.

Caedium Membrane CFD Simulation

Goals

In this tutorial, you will learn how to:

Specify fluid conditions on a single volume for an incompressible, steady-state, turbulent flow simulation
Specify boundary conditions on faces
Specify meshing parameters
Generate a velocity magnitude color map
Generate velocity vectors
Create lift and drag force monitors
Monitor residuals to determine flow simulation convergence
Export results for ixForten 4000

Assumptions

You have activated the Caedium RANS Flow and Viz Export add-ons, or Caedium Professional.
You are familiar with Caedium essentials.
You have either:
- Launched Caedium with the project file (membrane.sym) containing the geometry for this tutorial
- Created the geometry by following the tutorial "Double-Sided Membrane"

The geometry within Caedium should appear as shown below.

Prepare the Volume

Right-click an edge of the volume, double-click the first volume (volume_2) in the Select dialog and then select Properties from the menu. In the Properties Panel, select the Volume tab and set theName to flow-volume.

Create Membrane Group

Create a group for the membrane and its shadow so that later on in this tutorial you can monitor the integrated drag and lift forces.

Right click on the membrane base edge. In the Select dialog selectface_6-shadow, press the Ctrl key and select face_6 in the Selectdialog, click OK, select Group, and then select Properties.

In the Properties Panel, select the Group tab and set Name tomembrane.

Specify the Substance Settings

Specify the Fluid Conditions

Select the Physics Tool Palette. Select Substances->Air. The Properties Panel will show the default properties for air. To enable incompressible turbulent (viscous) flow the State->Rotational and State->Viscousproperties should be set to Yes (their default values), and the State->Compressible, State->Heat Transfer and State->Transient properties should to be set to No (their default values).

Drag and drop the Substances->Air tool onto an edge of the volume. Select Done to set air as the fluid inside the volume.

Set the Reference Velocity for the Simulation

The reference velocity will be used to initialize the simulation and to specify the free stream velocity boundary condition. In this tutorial you will set a reference velocity of [8.66 5 0] m.s^-1, from 10 m.s^-1 @ theta = 30 degrees to give [10 * cos(30), 10 * sin(30), 0].

In the Properties Panel set Substance: Air->Properties->Phase: Single->Reference->U: Fixed Value->Value to be [8.66 5 0] and press Enter on the keyboard.

Set the Non-Orthogonal Corrections for the Simulation

In the Properties Panel, expand the Substance: Air->Solver: RANS Flow->Solution property, and then set Non-Orthogonal Corrections to be 0.

Specify the Boundary Conditions

Wall Conditions

Drag and drop the Conditions->Wall tool onto an edge of the volume. Double-click flow-volume->Faces in the Select dialog and select Doneto create walls on the outer surfaces of the volume.

A Wall condition is a solid surface through which fluid cannot flow.

Inlet-Outlet Conditions

Drag and drop the Conditions->Inlet-Outlet tool onto edge_8 (blue). In the Select dialog select face_1, press Ctrl and select face_5 in theSelect dialog, click OK, and select Select/Deselect. Select edge_7 (red) in the View Window, in the Select Dialog select face, press Ctrl and select face_4, click OK, select Group, and select Done.

In the Properties Panel, set Name to be circumference, and set Physics: Inlet-Outlet->Type to be Free Stream.

An Inlet-Outlet condition of type Free Stream allows the fluid to enter or leave the flow domain.

Slip Condition

Drag and drop the Conditions->Slip tool onto an edge of the face shown in green below, double-click face_3 in the Select dialog and select Done.

A Slip condition ensures the flow velocity remains tangential to a face.

Specify Meshing Parameters

You do not need to apply any volume or boundary condition prior to focusing on the meshing process - all that is required is an active Substance on your flow domain.

Face Mesh

First you will focus on the surface mesh to avoid the extra time required to create the volume mesh.

To see individual surface mesh elements during the meshing process, right-click on the View Window background, double-click sim->Faces, and select Properties from the menu. In the Properties Panel, set Style toFlat.

Select the Results Tool Palette. With all faces still selected from the previous operation select the Scalar Fields->A (area) tool, click Add A at the bottom of the Properties Panel and select Color Map.

The request for the A color map will cause all the faces to be meshed.

Zoom the view using the mouse wheel to focus on the membrane mesh.

Select the Physics Tool Palette and select the Conditions->Accuracytool. In the Properties Panel set Accuracy to Custom and set Resolutionto 100. Drag and drop the Conditions->Accuracy tool onto a membrane edge, double-click face_6 in the Select dialog, and select Done.

Applying the Accuracy tool will cause all the faces to be remeshed which will take a few seconds.

Volume Mesh

To see individual volume mesh elements during the meshing process, right-click on any edge in the View Window, double-click flow-volume, and select Properties from the menu. In the Properties Panel, turn off theTransparent property and set Style to Flat.

Select the Results Tool Palette. With the volume still selected from the previous operation double-click the Scalar Fields->Vol Ratio (volume ratio = actual volume/ideal volume) and select Color Map.

The request for the Vol Ratio color map will cause the entire volume to be meshed which will take a few seconds.

Drag the upper threshold slider to the left in the View Legend to examine the cells with the lowest quality (lowest value in the blue range).

If you were to see clusters of low quality cells attached to the geometry then that is a sign that you need to improve the mesh in that region using the Accuracy tool. Fortunately this mesh does not suffer from low quality element clusters and you can proceed on with the simulation.

Display Initial Velocity Color Map

Drag and drop the Vector Fields->U (velocity) tool onto the View Window (view) background, double-click sim->Faces, select Color Map to create contours of velocity magnitude on all faces.

In the Properties Panel, set Style to Smooth.

Check that the velocity magnitude value (shown in the View Legend color bar) matches the value you expect as confirmation that your reference velocity is correct.

Display Initial Velocity Vectors

Drag and drop the Vector Fields->U (velocity) tool onto an edge of the circumference faces, double-click the circumference group in the Selectdialog, and select Arrows to create arrows colored by velocity magnitude.

Check that the arrows are oriented in the direction you expect as confirmation that your reference velocity is correct.

Create New Drag Result

Given that the air direction for this simulation can vary, i.e., it is not aligned with the X-axis, you need to create a new result for the drag force = Sum(F:X.Cos(theta) + F:Y.Sin(theta)), where F is force per element and theta is the angle between the air direction and the X-axis in the XY-plane.

The steps to calculate the new drag result are:

Create a scalar constant theta
Create Cos(theta) and Sin(theta)
Create F:X.Cos(theta) and F:Y.Sin(theta)
Create F:X.Cos(theta) + F:Y.Sin(theta)
Create Sum(F:X.Cos(theta) + F:Y.Sin(theta))

Create Scalar Constant theta

In the Toolbar, click the New button and select Result.

In the Create Result dialog, select the Constant tab. For Units, selectAngle.

Click Create to create a scalar.

In the Results Tool Palette, select Scalar Variables->Scalar (the scalar variable you just created), click on it again to make its name editable, and change Scalar to theta.

In the Properties Panel, set the Value of theta to 30. Press Enter on the keyboard to apply the changes to the Properties Panel.

Create Sin(theta) and Cos(theta)

In the Create Result dialog, select the Unary tab. Select Sin from the list. Drag Scalar Variables->theta from the Results Tool Palette and drop it onto the target in the Create Result dialog and click Create to createSin(theta).

Perform the same procedure again but select Cos from the Unary operators list to create Cos(theta).

Create F:X.Cos(theta) and F:Y.Sin(theta)

In the Create Result dialog, select the Binary tab. Select Multiply from the list.

In the Results Tool Palette, select Vector Fields->F (force). In the Properties Panel set Scalar to X.

Drag and drop Vector Fields->F onto the left-hand target in the Create Result dialog. Select Scalar to specify the X-force-component as the left-hand variable for the equation.

Drag Scalar Variables->Cos(theta) from the Results Tool Palette and drop it onto the right-hand target in the Create Result dialog and clickCreate to create (F:X x Cos(theta)).

In the Results Tool Palette, select Vector Fields->F (force). In the Properties Panel set Scalar to Y.

Drag and drop Vector Fields->F onto the left-hand target in the Create Result dialog. Select Scalar to specify the Y-force-component as the left-hand variable for the equation.

Drag Scalar Variables->Sin(theta) from the Results Tool Palette and drop it onto the right-hand target in the Create Result dialog and clickCreate to create (F:Y x Sin(theta)).

Create F:X.Cos(theta) + F:Y.Sin(theta)

In the Create Result dialog, select the Binary tab. Select Add from the list.

Drag and drop Scalar Fields->(F:X x Cos(theta)) onto the left-hand target in the Create Result dialog. Drag and drop Scalar Fields->(F:Y x Sin(theta)) onto the right-hand target in the Create Result dialog and clickCreate to create ((F:X x Cos(theta)) + (F:Y x Sin(theta))).

Create Sum(F:X.Cos(theta) + F:Y.Sin(theta))

In the Create Result dialog, select the Unary tab. Select Sum from the list. Drag Scalar Fields->((F:X x Cos(theta)) + (F:Y x Sin(theta))) from the Results Tool Palette and drop it onto the target in the Create Resultdialog and click Create to create Sum(((F:X x Cos(theta)) + (F:Y x Sin(theta)))).

Close the Create Result dialog. In the Results Tool Palette, select Scalar Variables->Sum(((F:X x Cos(theta)) + (F:Y x Sin(theta)))) and rename itDrag.

Create Force Monitors

Drag Monitor

Drag and drop the Scalar Variables->Drag tool onto a membrane edge. Double-click the membrane group in the Select dialog and selectMonitor.

Drag and drop the Drag Monitor tab over to the right-hand edge of the Caedium application window to split the window into two parts as shown below.

Lift Monitor

In the Results Tool Palette, select Vector Variables->F (force). In the Properties Panel set Scalar to Z.

With the membrane group still selected from the previous Drag monitor creation, double-click the Vector Variables->F tool and select Monitor.

Drag and drop the F Monitor tab over to the right-hand edge of the Caedium application window to split the window into three parts as shown below.

Create Residuals Monitor

Left-click in the View Window to give it focus. Drag and drop the Special->Residuals tool onto a membrane edge. Double-click flow-volume in theSelect dialog and select Monitor to create the residuals monitor.

Drag and drop the Residuals Monitor tab over to the top-right-hand edge of the Caedium application window to add the monitor to the drag monitor tab row as shown below.

Run the Flow Solver

The number of flow (simulation) solver iterations is determined by multiplying the number of simulation time-steps (default = 5) by the number of iterations per simulation time-step (default = 100). The number of simulation time-steps is determined by dividing the simulation duration (default = 5 s) by the simulation time-step (default = 1 s). After each simulation time-step (equivalent to 100 iterations by default) the results will be refreshed. For this simulation the defaults are fine and will result in a total of 500 iterations.

To run the flow solver, click Play on the Toolbar.

If you wanted to interrupt the flow solver, you would re-click the Play button; the solver would then stop at the end of the current simulation time-step.

Let the solver complete its run. Note the updates of the velocity vectors, velocity color map, the forces monitors, and the residuals monitor as the simulation progresses.

Solver convergence is indicated by:

The Residuals Monitor shows the solver residuals decreased with increasing iterations smoothly and progressed below 0.001, i.e., over 3 orders of magnitude reduction
The Drag and F monitors both show convergence close to single values with increasing iterations

To make it easier to differentiate between the inner and outer membrane results, select the membrane base edge, in the Select dialog double-clickface_6 (inner results), and select Properties. In the Properties Panel, turn off the Transparent property.

If you change the reference velocity flow direction then you will also need to change theta used by the drag monitor. Select the View Window background, in the Select dialog double-click sim. In the Properties Panel select the Simulation tab and set Constants->theta accordingly.

Export Results to ixForten 4000

ixForten 4000 can import CFD results from Caedium as Alias/Wavefront (.obj) for the geometry and as Comma Separated Values (CSV) for the Pressure Coefficient (Cp) data.

Create New View

Click the New button on the toolbar and select View to create view_1.

Export the Membrane as .obj

Select the membrane base edge, in the Select dialog double-click face_6, and select Properties. In the Properties Panel turn off the Transparentproperty.

Right click on the View Window (view_1) background, in the Select dialog select sim->Edges, press the Ctrl key and select sim->Axes in theSelect dialog, and click OK. In the Properties Panel turn on theTransparent property.

This should leave only the membrane face visible ready for export.

In the Menu Bar, select File->Export.... In the Export dialog set Save as type to Alias/Wavefront (*.obj), set the File name to membrane-cp.obj, and click Save.

In addition to the membrane-cp.obj file the export operation will also save a membrane-cp.mtl file.

Export Cp Data as .csv

Drag and drop the Scalar Fields->Cp (pressure coefficient) tool onto the shaded membrane face in view_1. In the Select dialog double-click themembrane group, and select XY Plot to create a plot of the Cp values on the membrane faces.

Select File->Export.... In the Export dialog set Save as type to Plot Series (*.csv), set the File name to membrane-cp.csv, and click Save.

Flow Over a Double-Sided Membrane

2012-10-16T16:08:00.002+05:30

Submitted by symscape on September 17, 2012 - 14:04

Symscape, Computational Fluid Dynamics for All has been working with our team to find a optimum workflow for wind fluid flow on tensile surfaces. After months of work we have made available a connection between ixForten 4000 and Caedium Professional platform.

ixForten 4000 models can be easily exported to Caedium for wind flow analysis and after running the simulations, Cp values and P values are reimported into ixForten 4000 for non-linear structural analysis.

This connection between ixForten 4000 & Caedium opens a wide range of new possibilities in the design of membrane and tensile structures making the Platform ixForten 4000 Premium + Caedium the most valuable tool for workflow.

The Astrup Fearnley Museum of Modern Art - Oslo

2012-10-16T15:54:00.000+05:30

The Astrup Fearnley Museum of Modern Art is a privately owned Contemporary Art gallery in Oslo in Norway. It was founded and opened to the public in 1993.

The collection's main focus is the American appropriation artists from the 1980s, but it is currently developing towards the international contemporary art scene, with artists like Jeff Koons, Richard Prince, Cindy Sherman, Matthew Barney, Tom Sachs, Doug Aitken, Olafur Eliasson and Cai Guo-Qiang. The museum gives 6-7 temporary exhibitions each year. Astrup Fearnley Museum of Modern Art collaborates with international institutions, and produces exhibitions that travels worldwide.

The museum created a stir in the international art world in 2002 when it purchased the American artist Jeff Koons's monumental sculpture in gilt porcelain of the pop star Michael Jackson with Bubbles, his favorite chimpanzee, for USD 5.1m.

In Oslo natural light is precious, particularly in the winter months. Using the available light was therefore the driving concept for The Renzo Piano Building Workshop when designing the Tjuvholmen Icon Complex.

The three buildings are covered by the sweeping curved roof that comes right down to the park. Other materials are few and include timber cladding a reference perhaps to the traditional buildings of historic Norwegian fishing villages such as the beautifully preserved Hanseatic buildings of Bryggen in Bergen.

The roof is glazed and layered in such a way as to allow as much wintertime natural light into the museum and other buildings as possible. The light is filtered and defused to render the interiors, and exhibits naturally and with the welcome side effect of saving on electricity.

The project is composed of three discrete buildings, a gallery an office and a culture centre and is set out along a new axis that connects the city to the sea along new canals ending in a floating dock. Along this route is a new outdoor sculpture park.

Photos: Nic Luhoux

The Astrup Fearnley museum is now officially open. The entire centre will provide a valuable cultural space for Oslo.

Caedium v4 Sneak Peek: Tensile Membrane Structure Analysis

2012-09-25T12:50:00.000+05:30

Membrane Displacement Calculated by ixForten 4000

Model: courtesy of SobreSaliente Ltda,

Cp data source: Caedium Professional

By the time this is out, the next version of Caedium will be able to perform a CFD simulation of a tensile membrane structure and then export surface pressure coefficient (Cp) data for structural analysis in ixForten 4000. This exciting development will allow ixForten 4000 users to perform non-linear stress analysis to better determine membrane displacement with more precise wind pressure loads than previously available, leading to more cost efficient structures and supports.

As an example of the new capability, Gerry, first exported the original membrane, from ixForten 4000 using the Wavefront file format (.obj). Next Gerry imported the Wavefront geometry into Caedium, configured the flow volume and physics, and then ran the CFD simulation.

Caedium v4 Membrane CFD Simulation: Streamlines

Caedium v4 Membrane CFD Simulation: Surface Pressure Coefficient (Cp)

Next Gerry exported the Cp surface data and corresponding surface mesh from Caedium for import back into ixForten 4000.

Membrane Cp Displayed in ixForten 4000

As the final stage of the process, Gerry ran a non-linear structural analysis in ixForten 4000 using the Cp data as the boundary loads for the membrane. The results from the ixForten 4000 simulation are shown as displacement contours in the image at the top of this post.

The results have been quite encouraging and Now, the CFD module has slowly been integrated in the gold version of the software.

Adaptive Construction: A timber tensile roof that adapts to loads

2012-09-25T12:41:00.001+05:30

Structures have always been designed for an exact maximum stress; this type of stress, however, generally only occurs very rarely and then only for a short period. As a result a large part of the building materials used today therefore serves these extremely seldom peak loads and is effectively seldom used.

The aim of ultra lightweight structures developed at the University of Stuttgart is therefore to achieve a drastic saving of materials and a better reaction to dynamic loads through an active manipulation of the structure. In the case of the Stuttgart wooden shell this manipulation is achieved through hydraulic drives: these drives rest on the points of support of the shell and generate movements that compensate in a specific way for deformations and material stresses caused by wind, snow and other loads.

Institute for Lightweight Structures and Conceptual Design (ILEK) and Institute for System Dynamics (ISYS) of the University of Stuttgart in cooperation with Bosch Rexroth have realised an adaptive structure on a large scale for the first time. The shell made of wood is supported at four points. Three of these points can be moved individually by hydraulic cylinders and freely positioned in space. Sensors record the load status at numerous points on the structure. Targeted movements of the points of support counteract variable loads (for example through snow or wind) and thus reduce deformations and material stresses. Compared to conventional, passive structures this considerably reduces the use of materials for the shell. The load balancing takes place through a Rexroth control system which was especially developed for hydraulic drives. The core task of the control system is to implement the complex hydraulic control tasks of the shell structure. In this way the supporting structure can react to a change in the load status within milliseconds.

An active vibration dampening and the adaptation to changing loads can be applied in many areas of construction, for example in stadium roofs, in high-rise buildings, in wide-spanning façade constructions or in bridges. The results of the research project at the University of Stuttgart thus enable a completely new construction method which not only saves resources but at the same time also considerably increases the performance of supporting structures. The active dampening of dynamic loads (for example from the effects of wind, earthquake or explosions) namely enables not only a drastic reduction in weight but furthermore also reduces material fatigue and damage to the structure.

In order to be able to actively compensate loads and vibrations, these influencing factors initially have to be precisely recorded resp. predicted; a second step would be to calculate the necessary counter-movements in real time (and likewise promptly to implement them). Researchers from the University of Stuttgart developed simulation models for this purpose, enabling an exact prediction of the behaviour of the structure. The material stress as well as the vibration behaviour under static and dynamic exposure is thereby taken into account. These simulation models serve as a basis for the development of control concepts which calculate the necessary counter movements on load and vibration compensation depending on the recorded measured values. These movements are then precisely implemented through the hydraulics.

Read more about it Here and Here

Project participants:
Institute for Lightweight Structures and Conceptual Design (ILEK), University of Stuttgart
Prof. Werner Sobek, Stefan Neuhäuser, Christoph Witte, Dr. Walter Haase

Institute for System Dynamics (ISYS), University of Stuttgart
Prof. Oliver Sawodny, Martin Weickgenannt, Dr. Eckhard Arnold
Bosch Rexroth AG, Lohr a. Main
Dr. Johannes Grobe, André Fella

Contacts:
Stefan Neuhäuser: Tel.: 0711 685-63705,
Martin Weickgenannt: Tel.: 0711 685-66960,
André Fella: Tel.: 09352 18-1010,

Bamboo: From Green Design to Sustainable Design

2012-09-14T14:28:00.001+05:30

The book “Bamboo: From Green Design to Sustainable Design” by Rebecca Reubens is now on the market and available on Amazon, Flipkart and at stores in India and overseas.

The introduction for her book was written by Prof. Ranjan, which i am including below.

The book focuses on the links between design, craft and sustainability, expanding the scope of design and opportunities for designers. It inspires designers to move beyond ‘green’ or eco-design, into the realm of holistically sustainable design by focusing on bamboo - an ancient, renewable material - which has recently seen a resurgence in popularity, in both design and sustainability. The book highlights bamboo’s versatile applications and their impact on ecological, economic, social and cultural sustainability. The Sustainability Checklist included here will empower designers to guide and evaluate their designs - and move from green design towards sustainable design. The Princ e Claus Fund supports this publication for its treatment of sustainability’s many facets, unlike others that only recognize the ecological meaning. The Fund believes that culture is a basic need and the motor of development, and so actively seeks cultural collaborations founded on equality and trust, with partners of excellence, in spaces where resources and opportunities for cultural expression, creative production and research are limited and cultural heritage is threatened.

About the Author

Rebecca Reubens trained formally as an industrial designer. She now works at the intersection of design, craft and sustainability. A large part of her work has been for the development sector, with international bodies such as INBAR and UNIDO, in Europe, Asia and Africa.

She also has her independent practice, through her design firm Rhizome, which believes that renewable materials crafted into contemporary designs are the route to holistically sustainable products. Rebecca is currently pursuing her PhD at the Design for Sustainability subprogram at the Delft University of Technology on the links between sustainability, design and development, through the medium of bamboo.

"Preamble

Rebecca Reubens has asked me to write an Introduction for her new book that attempts to bridge three fields that I am deeply interested in and in which I too have been working for a very long time now. The three fields are Design, Bamboo and Sustainability, all of which are extremely complex in their own right and there is little real understanding of the issues and approaches within each of them in the modern world due to a paucity of published research here. Modern design has been around for some time having evolved from its roots in the industrial revolution but it has unfortunately become a form of consumerist expression by industry and the profession and the real human development angle is all but forgotten and we need to rediscover this aspect as a fresh approach. Bamboo is still quite unknown tomodern industry and the design profession although it is a grand old material of traditional societies across Asia and Latin America. Finally, Sustainability has arrived with a bang at the policy level since we are faced with the excesses of industry and governence that has caused both global warming and climate change as well as social unrest which is a product of our selfish ways, all needing a serious rethink and I am happy to see these three issues being addressed here in this book.

In the world of traditional societies in Asia, Africa and Latin America there exists a demonstrated deep understanding of all three subjects since these have been used in an evolutionary manner by local communities for many centuries. These continue to exist as a living culture in their rural communities and lifestyles even today but I must say that modern communication and changing aspirations is affecting these towards rapid extinction. Just as our plant and animal species are being depleted by massive modern exploitation of resources these pearls of traditional wisdom are being lost just as rapidly by human neglect. Here I must draw particular attention to the Apa Tani tribes of Arunachal Pradesh who have over many centuries of development in their niche valley in the Eastern Himalayas demonstrated a sustainable lifestyle that is based on the careful cultivation and utilisation of bamboo, timber and an integrated water management system for agriculture that is as yet an unknown value in modern life around the world.

Design, on the other hand, is a natural human activity that evolved with man over the ages but it has now has been relegated to the precincts of a professional marketing priesthood that manages the activity in the marketplace of our global economy. Design as it was deeply understood by traditional societies as a broad based human imaginative activity has been relegated to the back burner since we have chosen to follow the specialized path of science and the trained manager since they provide rational answers for everything and modern man and their society can only decide based on explicit knowledge while design in most cases is felt or tacit knowledge and is based on instincts that are better judged by sensitive interpretation rather than by the application of cold logic. This is why I felt compelled to set up my blog titled “Design for India” where I could debate the other dmensions of design that are much needed in India today.

Bamboo, has been nurtured by traditional societies across Asia and Latin America and its varied species provide a natural material that had wide spread use in thousands of traditional applications in many parts of Asia, Africa and Latin America where it was abundantly grown but with the arrival of industrial revolution and the spread of Western know-how the dominant materials of our economies started depending on minerals like stone, limestone and cement, metals like steel and copper, synthetics such as plastics and petrochemicals and some economic agricultural commodities such as cotton and jute. Bamboo was therefore neglected by the colonial leaders as the spread of technology and formalized knowledge also meant the reduction of local knowledge in materials that were already in wide and sophisticated use in Asia and Latin America, particularly bamboo which was considered the ‘poor mans timber’ while the emphasis and official attention of the Government in India shifted to timber and wood during the heydays of the British Raj.

Sustainability is the hallmark of most settled societies that evolved slowly over thousands of years and gradually built up their lessons of stable and predictable agriculture and lifestyles that were quite in sync with the beat of natures’ processes. However with the arrival of power assisted technologies and communication man could do a lot more and much faster and the race for the dominance of nature commenced in real earnest and each nation tried to outdo the other in their race for global dominance in economy, power and social well being, all measured by growth and growth alone. However, the destruction of pristine rain forests in search for minerals and material wealth and the release of toxic gasses into the atmosphere has had its natural consequences and we are on the threshold of rediscovering the concept of sustainability in the face of the threat of human extinction, a threat that is imminent, if corrective strategies are not adopted by the worlds citizens and their political leaders on a most urgent basis. Sustainability is then a call for a return to a steady-state economy that echoes nature in all its involved and intertwined processes.

This impending crisis places this particular manuscript at the centre of the debate where all three subjects can play a meaningful role and in trying to address and bridge these three difficult but critical fields that promise to bring long term benefits that can counter the problems of our uncontrolled developments of the past few hundred years. Design strategies will need to be explored and design itself will need to be understood and applied by political leadership across the world along with the subjects of science, technology and management and design at a deep level will play a huge role in the reversal of global warming and the move towards sustainability in the days ahead. Bamboo is the fastest growing plant material known to man and we will need to learn to use it in new and improved ways to supplement our vast needs for materials across many areas of application and much research would be needed to fill the gaps in our knowledge along with an urgent attempt to codify and garner the traditional wisdom that still exists across the bamboo culture zones of the world, particularly in Asia and Latin America. Sustainability too is a subject of current scientific and political interest and there is much that we need to understand about the symbiotic processes that live and work in nature and then be able to use this understanding back into our own ways of living and doing things in the future.

This manuscript, “Bamboo: From Green Design to Sustainable Design” by Rebecca Reubens stands as a brave attempt to bridge the huge gap and I am sure it will encourage others to follow in the much needed integrative research and design actions that is needed in the days ahead. Rebecca studied design at National Institute of Fashion Technology (NIFT) and then joined National Institute of Design (NID) in the Furniture Design discipline where I used to trach teach till I retired in 2010. She started her own journey into bamboo when she took on the subject as her Diploma Project as a student of Furniture Design at NID. We had a challenging project handy as part of the Bamboo & Cane Development Institute (BCDI)project that I was heading in 2001 and she has stayed with the subject and journeyed far as a member of the International Network of Bamboo & Rattan (INBAR) field team and now she has taken it on as her subject for her PhD Thesis at TU Delft in Design and Sustainability through the medium of Bamboo. She also went on to set up her own enterprise to work with local communities in Gujarat and from this to learn the significance of human effort at the grassroots using Design, Bamboo and Sustainability as her driving principles and to learn from this experience that which is not yet stated in any book so far, lessons from real life experiences from the field. All three much needed today and I wish her success."

from MP Ranjan's Blog...

‘Honey Scape’ Landscape Pavilion

2012-08-26T17:10:00.000+05:30

Architects: Gonçalo Castro Henriques, X-REF Architectural Research & Development
Location: Ponte de Lima, Portugal
Client: Municipality of Ponte de Lima
Partners: X-REF, BÖ01 project management, Dagol Lda
Collaboration: Paulo Teodósio, Pedro Torres e Pedro Negrão (MergeLab), Helder Carvalho
Project Area: 280 sqm
Project Completion: 2012

Honey Scape is a dreamy temporary pavilion made of interlocking hexagonal sheets (or combs) of alveolar polycarbonate that create a dazzling display of light and shadow. “The combs act in part as the voussoirs of a parabolic arc supporting each other,” the designers explained. This allows them to “adopt a configuration of a double curvature surface… and adjust its size to their relative position in the structure.”

The components were digitally fabricated and constructed on site using metal connectors and a cable system. The resulting low-tech, 280 square meter pavilion commissioned by the municipality of Ponte de Lima and completed earlier this year heralds a new type of bio-tech art. Its main purpose, in addition to introducing a new aesthetic into the public realm, is to establish ultimate synergy between people and the built and natural environment.

Golden Honey Scape Pavilion Mimics a Giant Honeycomb in Portugal Inhabitat - Sustainable Design Innovation, Eco Architecture, Green Building A low-tech construction system was developed to build this complex structure. The system was complemented with metal connectors and a cable system on site. As it happens in the hives, this system required cooperative work to be assembled and became a reality. Networking and self-organization, which have inspired artificial intelligence, also inspired this solution. It offers bio-tech-art for a symbiosis between human and nature.

The installation avoids mimicking or confronting the landscape, rather seeking a man, nature and technology synergy. The structure recreates the honeycomb rules adapting to a lightweight double-curved surface in alveolar polycarbonate. The hexagonal geometry of the honeycomb is set according to three references – the parabolic arch, the double curved surfaces and the process of material adaptation. So the combs act in part as the voussoirs of a parabolic arc supporting each other, adopting a configuration of a double curvature surface (hyperbolic paraboloid), and adjusting its size to their relative position in the structure. The combs are larger at the base, decreasing in size and height towards the top of the structure. The generation and manufacture of the components relied on the use of scripting and digital fabrication.

Built after winning an international landscape competition at Ponte Lima, Portugal, Honey Scape is temporary landscape pavilion by Gonçalo Castro Henriques of X-REF. This installation intends to shelter the visitor, captivating him by a dream-like atmosphere with aromatic plants. This atmosphere is defined by a light and transparent structure, based on a honeycomb, creating a dynamic of light and color throughout the day. More images and architects’ description after the break.

DSSH Bridge Powered by the Sun, Purifying the Air

2012-08-18T13:22:00.000+05:30

This shape-shifting helix bridge is a flexible tensile structure, by applying more tension to different points, a technological dynamic deformation can be achieved in response to the people crossing the bridge. It becomes a living element that responds to its use. Not surprisingly, this design won the first prize at the Building to Building Pedestrian Bridge International Challenge.

The tensile skin incorporates Foldable Photovoltaic Solar Panels capturing energy from the sun to generate and supply electricity from a clean and sustainable energy. This makes the bridge self-sustainable. To go beyond green, the design includes Plants that clean and purify the air, transforming the pollution of the city in pure oxygen. Plants and the Breathable Membrane make a greener environment and a clean pedestrian tunnel.

via Sanzpont Arquitectura

Urban Redevelopment Project at Tainan Main Station Area

2012-08-12T17:47:00.002+05:30

Architects: Maxthreads
Location: Tainan, Taiwan
Project Team: Max Yang, David Millar, Samya Kako
Competition Organizers: Bureau of Development Tainan City Government, Taiwan (R.O.C.) & INTA (International Urban Development Association)
Prize: Second Prize

The second prize winning vision for the Urban Redevelopment Project at Tainan Main Station Area responds to the extending aim of positioning Taiwan in general, and Tainan city in particular, as a major historical based tourism destination. Designed by Maxthreads, their strategy attempts to contribute to Taiwan’s economic diversification from its current infrastructure lead planning system. More images and architects’ description after the break.

Tainan main station master plan is imagined as a cultural based community and nature intervention, with sustainable residential development and the potential for natural habitat areas. It aims to be a cultural and vibrant edutainment intervention as well as a secluded haven of peace and tranquility. Tainan main station is conceived as a new gateway of Taiwan’s history.

The proposal aims to reconcile community and biodiversity. It will act as an eco-transitional urban device, transferring and linking the diversity of the surrounding urban districts and programs. The concept behind the master plan proposal derives from the area’s original function as transportation node. The proposal will maintain the areas historical identity, whilst providing a boundary free and a self-sufficient urban planning, incorporating a number of sustainability systems.

Grand Theater Qingdao

2012-08-12T17:37:00.004+05:30

Architects: gmp architekten

Location: Qingdao, Shandong, China

Design Team: Meinhard von Gerkan, Stephan Schütz, Nicolas Pomränke

Project Year: 2010

Project Area: 60,000 sqm

Photographs: Christian GahlArchitects: gmp architekten

Location: Qingdao, Shandong, China

Design Team: Meinhard von Gerkan, Stephan Schütz, Nicolas Pomränke

Project Year: 2010

Project Area: 60,000 sqm

Photographs: Christian Gahl

The Grand Theater is situated on the eastern side of the city of Qingdao between a bay in the Yellow Sea and Mount Laoshan (1,130m above sea level). Because of the unique situation of the massif directly by the sea, the Laoshan ridge is often wreathed in clouds, which gives the landscape a unique, often mystical, setting.

The style of the building relates to the mentioned natural spectacle, with the massif and the lightness of the clouds reflected in the appearance of the Grand Theater. It rises from the landscape like a mountain — a cloud-like roof seems to wreathe the four buildings. The raised terraces in the surrounding park are reminiscent of a mountain plateau, and take their bearings both from the sea and the mountains.

In addition to the opera house a concert and a multifunction hall as well as a media center and a hotel are integrated into the complex.

The foyer of the opera house offers direct views of the sea. Audiences can enter the auditorium on two levels, either via the lower level, giving access to the large cloakrooms and the lower circle, or via the main foyer.

Stadion Miejski Wrocław

2012-08-12T17:26:00.000+05:30

Architects: JSK Architekci

Location: Wrocław, Poland

Architect In Charge: JSK Architekci

Design Team: Zbigniew Pszczulny, Mariusz Rutz, Piotr Bury (project manager)

Project Year: 2011

Photographs: JSK Architekci

Project Area: 248,401 sqm

Landscape Architect: RS Architektura Krajobrazu

Structure: Schlaich Bergermann und Partner (steel structure), Matejko i Partnerzy Biuro Konstrukcyjne (RC structure)

Background

UEFA’s decision to select Poland and Ukraine as the hosts of EURO 2012 encouraged the city of Warsaw to organize an architectural competition for the new stadium which would hold 40 thousand seats and be prepared to host group matches of EURO 2012. 21 renowned architectural practices were invited to compete. Polish practice JSK Architekci was awarded with the first prize and in October 2007 the office was granted the commission to deliver the project.

Development site is 7km outside of Wroclaw city centre. Existing infrastructure surrounding the new stadium was improved by the new motorway bypass and the new tram line providing additional access to the site from west and north. Stadium development had a positive impact on the economical growth of the surrounding neighbourhood with plans of further development i.e. a new office park and the first in Poland shopping mall strictly adjacent to the stadium.

Concept design
The stadium building and its surrounding were designed to present both interesting architectural form and fulfil requirements of economical exploitation yet providing maximum functionality and flexibility. The design of the site plan emphasizes the main building of the stadium making it a dominant feature in the surrounding space. Platform surrounding the stadium on the entrance level (6m above the ground) descends gently (4% fall) to the ground level under the street overpass allowing a comfortable and collision free pedestrian connection to the railway and tram station to the south, also covering level 0 of the stadium plot with VIP entrance, driveway and parking places. Separating main stream of pedestrians from the remaining vehicular circulation routes created a friendly and welcoming entrance zone to the building.

This plateau provides the pedestrians with an extensive space and a roof for the parking lot and the service road. The plateau from the north western side is woven by with the rising plateau of the car park. This rising roof level of the car park hides the one for a shopping centre tied area. Conceived as a single tiered stadium with a uniform stand bowl, makes it possible for the spectators to be aware of a sporting event in a more exciting way. Despite the great building scale it has been successful to keep an intimate atmosphere on the whole stand. So we can experience a unique atmosphere. This stadium in its scale is one of the few with a single tier.

A clear and apparent scheme of the functional design makes a fluent admission into the stadium building possible. The bowl of the semicircular stand is attainable from 2 promenades on 2 levels. Numerous turnstiles which allows us to run onto the lower promenade are placed in a complete radius of the building. The upper promenade is easily attainable with the help of open stairwells. Both promenades form a kind and comfortable space with all possible welfare facilities (catering trade, toilets, first help, police). For a luxury the promenades were wrapped by a transparent membrane. On the one hand it offers protection of bad weather conditions, on the other hand it is closing the building form visually. The number of pillars was reduced considerably so that spacious and open promenades could be created.

Building rentable area organizing system is quite unique. Conventional designs usually locate rentable areas underneath tribune structures, Wroclaw’s stadium separates them from the structure by creating a promenade and a massive void allowing visitors admiring tribunes from underneath. Along promenades toilets and retail units ready to service 40 thousand visitors were located. Open staircases leading spectators up to the top level strengthen the feeling of openness and allow for the exposed reinforced concrete structure to be admired. Standing out mesh membrane is characteristic for the new Wroclaw stadium. It consists of a polytetrafluoroethylene covered fibreglass and is pushed on 5 ring beams of steel. The 5 ring beams refer by the horizontal geometry to the well-known Wroclaw’s modern architecture.

Stadium design was based on UEFA and FIFA guidelines supplemented with the experience of EURO 2006. All the tribune seats are roofed and provide unobstructed view of the pitch. Both promenade levels are duly serviced. On its western side business club and VIP hall were located. Zone for footballers and media has been envisaged as well. Level +3 holds lodges with the conference rooms featuring rows of seats facing the stadium arena. Stadium will also be home to sport bar, offices, physiotherapy centre, fitness club, discotheque, casino etc. Diversification of available services allows the building to be used all day long.

Structure
The main bulk of the stadium building consists of three main elements:
- Tribunes construction of reinforced concrete.
- Steel construction of the roofing structure, with its oval shape repeated in the form of three rings at varying angles surrounding the building.
- PTFE covered fibreglass mesh membrane stretched on the above mentioned steel rings.

Roof design is formed with the light cantilevered steel structure consisting of 38 radially spread trusses sitting on a pair of columns each (one is pressured the other tensioned). The stadium roof generally appears as membrane roof with a glass ring part designed to bring maximum amount of sunlight to the pitch.

Facade
Facade belting the stadium starts at the height of 3.5m above esplanade level. Its structure consists of 5 steel beams – rings and it is covered with partially transparent mesh membrane. Façade’s form results from the shape and arrangement of the steel rings formed with curved steel pipes. The lowest and the highest rings are placed horizontally keeping distance of 30m between them. This dimension determines the height of the mesh membrane façade. Additional dynamic factor to the facade was achieved by setting inwards and sloping the middle rings and by shifting northwards the upper fourth ring. Due to the strength of local winds affecting the elevation mesh membrane proper simulation tests in the aero dynamical tunnel were conducted during the designing process. Another simulation of smoke extraction was performed helping to properly design mesh grid and its factor of open area.

Summary
Thanks to façade treatment stadium appears to be light and transparent despite its massive size. The façade mesh protects the usable yet open space of the promenades from weather conditions such as rain and wind. Internal LED lighting system was introduced allowing the building to project light through the façade’s mesh from inside. Overall impression of the “glowing” building is similar to that of the Chinese lantern. Thanks to the LED technology colour and pattern of the lighting can be easily changed thus the building’s character can be visually adjusted to the planned event (such as EURO 2012, league and national tournaments, music shows or other mass events) and can generate particular feel to it following the current need.

Coca Cola Beatbox Pavillion

2012-07-26T09:16:00.001+05:30

Architects: Pernilla & Asif

Location: London, UK

Design Team: Asif Khan, Pernilla Ohrstedt

Project Year: 2012

Photographs: Hufton, Crow

The Coca-Cola Beatbox, designed by Asif Khan and Pernilla Ohrstedt is an experimental fusion  of architecture, sport, music and technology that creates a stunning sensory experience. The visionary structure acts as a musical instrument, allowing visitors to remix Mark Ronson and Katy B’s ‘Move to the Beat’ Coca-Cola anthem ‘Anywhere in the World’ – as they pass through the building.

The Coca-Cola Beatbox forms part of Coca-Cola’s Future Flames campaign which aims to shine a spotlight on Britain’s brightest stars and inspire other young people to pursue their passions.

Coca-Cola has spent two years working with partners including The Architecture Foundation, the Royal College of Art and experimental theatre company London Quest. Together, these organisations have helped Coca-Cola bring together the best in emerging talent across design, performance and technology as part of its commitment to using its sponsorship to shine a light on inspirational young people – its Future Flames. The result is a pavilion that is created by, embodies and celebrates the passions of thousands of Coca-Cola Future Flames who make a positive contribution to their local communities every day.

Emerging London-based architecture collaborators Asif Khan, 32, and Pernilla Ohrstedt, 31, were given creative control by Coca-Cola following a formal commissioning process administered by The Architecture Foundation. The dynamic pair have designed a pavilion that aims to connect young people to the Games by bringing together their passions for music and sport. Inspired by Coca-Cola’s global platform for London 2012 – Move to the Beat – the pavilion has been designed to function just like a musical instrument.

Its giant crystalline facade structure is made up of over 200 red and white inflated ETFE cushions, each gravity-defying panel connected like a house of cards. Integrated within these panels is proprietary audio, illumination and interactive sensor technology, enabling the architecture to be embedded with rhythmical sport sounds from GRAMMY award winning Mark Ronson and Mercury Prize nominee Katy B’s Coca-Cola anthem ‘Anywhere in the world’ for London 2012. His recordings from Olympic athletes’ heartbeats, shoes squeaking, arrows hitting a target, amongst many others, are triggered, played and musically remixed by an estimated 200,000 visitors’ gestures and proximity as they ascend the external spiral ramp on a 200m journey to the pavilion’s rooftop where they will enjoy spectacular views of the Olympic Park. The ramp then plunges down into the heart of the pavilion which will feature an interactive light installation created by Jason Bruges Studio.

Jason Bruge Studio’s Aerial Dynamics installation is a living, breathing light show that has been designed to emulate the effervescent energy released when a bottle of Coca-Cola is served and shared. 180 bespoke mechatronic ‘bubbles’ glow rhythmically in time with Mark Ronson’s track. Controlled with individual code, each bubble has eight polypropylene blades that fold intricately in on themselves. Special sensors embedded in the three ‘cheers in celebration’ kiosks at the base of the Beatbox detect when Coca-Cola bottles are clinked together, triggering the blades and bubbles to glow with red and white LED lighting. These light patterns become increasingly intricate as the number of participants grow.

Now that is a music box we'd like to have :D

KK100 / TFP Farrells

2012-07-06T13:46:00.004+05:30

Architects: TFP Farrells
Location: Shenzhen, China
Client: Kingkey Group
Structural Engineer: Ove Arup & Partners
Tower height: 441.8 m
GFA: 210,000 sqm
Completed: September 2011
Photographs: Carsten Schael, Fu Xing, Jonathan Leijonhufvud
---------------------------------------------------------------

KK100, the tallest building in the world completed in 2011, is an inn.ovative high density project that takes an entirely new approach to city making. It is situated on the edge of Shenzhen’s CBD and sets a new precedent for the successful 21st century transformation of commercial districts into vibrant and enriching environments. The 3.6-hectare site was previously occupied by a dense but low-rise residential quarter, Caiwuwei Village. The developer had the creative vision to form a company with the villagers, initiating an entirely new approach to the art of place-making in Shenzhen.

Existing buildings were run down and living conditions were poor. As part of initiating this transformation, a Joint Development Initiative was formed in which villagers became stakeholders. Each owner was offered a new property as well as a second home which serves as an income generating asset. This meant the preservation of community links that are built over generations. In order to offset the cost of re-provisioning residences for the villagers, the tower had to be exceptionally tall so that the project could be financially viable.

The 100-storey, 441.8-metre tower comprising over 210,000m2 of accommodation is part of the master plan for a 417,000m2 mixed-use development. The development includes five residential buildings and two commercial buildings. The floors of the tower are divided into three major functions. The floors from level 4 to 72 will house 173,000m2 of Grade-A office space while the uppermost levels from 75 to 100 will be occupied by a 35,000m2 6-star St. Regis hotel complete with a cathedral-like glazed sky-garden animated by various activities. One of the design features is the curving building profile. This form alludes to a spring or fountain and is intended to connote the wealth and prosperity of Shenzhen.

The perimeter column arrangement provides each level with an unobstructed working environment and stunning views towards Lizhi and Renmin Park as well as over all Shenzhen and beyond. It does not use the typical square foot print; the East / West façades being more slender and flared slightly so office floor plates are slightly bigger and the South / North façades that face Hong Kong and the Maipo marshes are wider. The slenderness brings certain challenges, most notably the swing or drift ratio and the robustness of the tower and performance of key elements. Instead of putting generators on top of the building, the roof is constituted by a curved smooth glazed curtain wall and steel structure.

As well as providing social and cultural continuity, KK100 is integrated with the metropolitan transport network, which is crucial for a high density project such as this. The connectivity between the various components of the master plan on various levels was critical; the tower is integrated with the podium on various levels while retail and public uses at lower levels are integrated with the Metro system; the residential blocks are linked at the higher levels to create easier neighbourhood accessibility while direct office and hotel connections are also provided for easier movement of people. The Tower serves as a ‘’Mini-city” which provides an amenity-rich focal point back to the community, offering a 24-hour city-life to be better for the environment and human interaction.

The Stuttgart Station Saga

2012-06-22T17:40:00.000+05:30

"A panel of know-alls"

Stuttgart - Excerpts from various newspapers...

As a responsible planner of the statics the Stuttgart engineer Werner Sobek knows the construction project of the deep station to the smallest detail. In an interview Sobek increasingly objects to the reasons to which the project must be stopped because of safety concerns.

Mr. Sobek, your colleague Frei Otto calls the freeze of Stuttgart21 as threatened due to the construction site "danger to life and limb." If the warning justified?

The warning is not justified in any way. I am shocked that Mr. Otto now expressed in this form - after many, many years has been involved in the project as an active planner and Stuttgart21 has known this for a long time so also the advice on the nature of the subsoil. These opinions do not say, that the project threatens or endangers life.

Mr. Otto warns of new underground station could be flooded by ground water or by the pressure of groundwater squeezed out of the ground uncontrollably. If you build in the groundwater, creating lift. It is known since Archimedes. The new Stuttgart main train station is between six and eight meters in groundwater. This is technically not a problem and the conditions of the city, if you go to the many parking garages, think light rail or commuter train tunnel, sensational in any way. On the contrary: The tubes of the S-and U-Bahn are for nearly 35 years in peace some six feet lower than the new station in the groundwater. And nothing has happened.

As a layman I would say that the subway station developed because of its size, a much higher lift than a narrow tube train. Is that correct?

Yes. But even the weight of the main station construction is sufficient to compensate for the buoyancy almost. It includes hundreds of stakes that anchor the station ten to 16 meters deep underground. This is an additional security. Overall, to the problem which Mr. Otto fears.

Mr. Otto said that he spoke his warning also of "moral obligation" of. Can you do with this concept in this context something?

I will not comment on that.

Try it.

At the Stuttgart 21 project some of the best and most prestigious Ingenierbüros are actually involved. This fellow can not just assume this way - even indirectly - that they would act irresponsibly or immorally. This is simply an absurdity.

================================================================

Stuttgart 21

co-creator of the station questioned

Michael Schmidt, 08/19/2010 17:28 clock

The 85-year-old Frei Otto does not currently mainly technical incalculable risks sufficiently into account.

Photo: Zweygarth

"If a design takes long to realize, then, the plan has become obsolete. "

Frei Otto on one of the problems of the low station

One of two designers of the deep station for Stuttgart 21 suggests a new beginning of the planning. The 85-year-old Frei Otto, who for more than 13 years has together with the Düsseldorf architect Christoph Ingenhoven designed the characteristic "light eyes" and the shape of the new Stuttgart station, does not currently particularly unpredictable technical risks sufficiently into account. Above all, the Safety concerns the architect and engineer and complains that the current criticism is based primarily on the costs: "If we had had in designing the current level of information, I would be dominated by the idea of a low station moved away." For a compelling reason why one would put the Stuttgart main station underground. Instead Otto is tinkering with the the idea of a high station in order to cross the Nesenbachtal. "A new plan could be mad to go fast, since there are now so much more information there than in the architectural competition in 1997." The current hard-fought were on the side wings of the other option and this has ever been an issue for the architectural competition.

Geological factors affecting work

"The purpose of the wings, which are for a station with steam locomotives because of the soot and smoke make it an absolutely necessity. Bonatz 'grand gesture to the east has seen hardly anyone," said Otto. . What made him much more strongly for a rethink, are the sum of the geological adversities and also insights and new and terrible experience of the behavior of crowds in the tunnel , "The main problem still remains: we sit down with the underground station in the groundwater, and it rises up. How is the 400-meter long and 100 meter wide concrete trough in which sits the underground station, to be held then, so that it floats not.

But can they be securely anchored? "asks the emeritus of the University of Stuttgart and founder of the Institute for Lightweight Structures in the face of the clay subsoil at Castle Garden. Also on another level, there are other problems with his creation: "Each design has its time has when it is not realized for long, then the plan becomes outdated and is flogged to death. Big projects who have no completion date, there is no psychological support" says Otto, who attained World fame for the design for the Munich Olympic roofs in collaboration with his colleagues in Stuttgart Gunter Behnisch 1972 .

Olympic Shooting Range - Temporary

2012-06-19T17:20:00.000+05:30

With the London Summer Olympic Games rapidly approaching, there has been much talk about either the games are in fact economically good for a city. At its best, hosting an Olympics can help revitalize a city, and at its worst, playing host can leave the host-country drowning in debt.

There are a lot of reasons for this, but one is simply the cost of building new venues, all with a price tag to match their state-of-the-art design. When the athletes and fans pack up and go, the new stadiums and event-specific venues–for example, the Athens Olympics had a venue just for taekwondo– are often left empty, and unused far before the bill is settled.

In London, there has been a little of everything, from big name high-priced venues to littler, temporary structures. But how do you make a temporary building that still has an architectural impact? Perhaps in an effort to answer this question, London and Berlin-based Magma architecture came up with a design for the Olympic Shooting Gallery that could be dismantled, but that you won’t soon forget.

The shooting galleries for the London 2012 Olympic games are covered in spots that look the suckers of an octopus’ tentacles.

Designed by Magma Architecture of London and Berlin, the Olympic Shooting Venue comprises three PVC tents that have been erected at London’s historic Royal Artillery Barracks in Woolwich.

The extruded red, blue and pink circles draw ventilation inside each of the venues and also create tension nodes for the steel structure beneath the white skin.

Some natural light permeates this PVC membrane, while entrances are contained inside all the spots that meet the ground.

As the structures are only temporary, they will be dismantled immediately after the Olympics and reassembled in Glasgow for the 2014 Commonwealth Games.

See all the permanent Olympic buildings in our recent slideshow feature, including the aquatics centre by Zaha Hadid and the velodrome by Hopkins Architects.

See more stories about London 2012 »

Photography is by J.L. Diehl unless otherwise stated.

The text below is from Magma Architecture:

London Shooting Venue

The London Shooting Venue will accommodate the events in 10, 25 and 50 m Sport Shooting at the 2012 Olympic and Paralympic Games in the southeast London district of Woolwich.

The first Gold Medal of the London Olympic Games will be awarded at the venue for Women’s 10 m Air Pistol on the 28th July 2012. After the event the three temporary and mobile buildings will be dismantled and rebuilt in Glasgow for the 2014 Commonwealth Games.

Shooting is a sport in which the results and progress of the competition are hardly visible to the eye of the spectator.

The design of the shooting venue was driven by the desire to evoke an experience of flow and precision inherent in the shooting sport through the dynamically curving space.

All three ranges were configured in a crisp, white double curved membrane façade studded with vibrantly colored openings.

As well as animating the façade these dots operate as tensioning nodes.

The 18.000 m2 of phthalate-free pvc membrane functions best in this stretched format as it prevents the façade from flapping in the windt.

Photograph by Steve Bates

The openings also act as ventilation intake and doorways at ground level.

Photograph by Steve Bates

The fresh and light appearance of the buildings enhances the festive and celebrative character of the Olympic event.

With the buildings being dismantled after the event an additional aim was to create a remarkable design which will be remembered by visitors and the local community thereby leaving a mental imprint the Olympic of shooting sport competition in Woolwich.

The shooting venue is not situated in the Olympic Park, but has its own location in Woolwich on the grounds of the historic Royal Artillery Barracks.

Photograph by Steve Bates

It is estimated that more than 104.000 spectators will watch the competitions.

Photograph by Steve Bates

The three buildings comprise 3.800 seats divided between two partially enclosed ranges for the 25 and 10/50 m qualifying rounds and a fully enclosed finals range. Together they form a campus on the green field.

Photograph by Steve Bates

Their up to 107 m long facades refer to the structured length of the Royal Artillery Barracks building, but have their own contemporary architectural expression.

Guided by the high requirements from the client, the Olympic Delivery Authority, sustainability was a key factor in shaping the design. All materials will be reused or recycled.

All three of the venues are fully mobile, every joint has been designed so it can be reassembled; and no composite materials or adhesives were used. In addition, the semitransparent facades on two of the three ranges reduce the need for artificial lighting and the ventilation is fully natural.

The tensioning detail was achieved through an efficient configuration of modular steel components commonly used in temporary buildings market. The double-curvature geometry is a result of the optimal use of the membrane material, which magma architecture has been experimenting with for a number of years, amongst others in the award winning head in I im kopf exhibition at the Berlinische Galerie in Germany.

Magma archtitecture was founded in 2003 by the architect Martin Ostermann and the exhibition designer Lena Kleinheinz. Central to our work is the use of complex geometric modeling as a way of creating a more spatially dynamic vocabulary. This is essential to better articulate and reflect the heterogenieity of our cities and global culture.

We seek to be part of a new paradigm within architecture – one that is expressionistic, rooted in non-linear form-making and facilitated by new materiality and cutting edge technologies.

Xhina: and why economies should slow down...

2012-06-18T14:43:00.000+05:30

China’s economy is slowing down. It’s projected growth rate is set to dip down to as low as a modest 6% versus the jaw-dropping double-digit rates of the past decade or more. In March, the government set its growth target for 2012 at 7.5%. It must be remembered that this is no accident. It is a calculated move. In the most recent five-year plan this general cooling-down is part of China’s strategy to avoid the sort of economic meltdown that hit the U.S. in 2008. They read the tea leaves and decided to take measures, as they can in a centrally-controlled economy, to ensure steady, modest growth rather than bubble-producing frenetic growth. Political stability is a huge factor in this. The communist party maintains its mandate as long as the engines of the economy continue to hum relatively smoothly.

Why the slow down? According to a recent special report in The Economist, nearly 48% of China’s GDP in 2011 was dominated by internal investment in infrastructure and city building. This should come as no surprise to foreign architects who have been riding this wave for the last twenty years or so. The scary part of this number is that most of this investment is being done by state owned enterprises (SOES) operating under artificially favorable conditions. On top of this, according to the ratings agency, Fitch, lending has jumped from 122% of GDP in 2008 to 171% in 2011. This “surge in credit” is strikingly familiar because it looks like the beginnings of America’s financial crisis. As The Economist notes, “When Fitch plugged China’s figures into its disaster warning system (the “macroprudential risk indicator”), the model suggested a 60% chance of a banking crisis by the middle of next year.”

What ramifications does a China slow-down have for foreign firms? Obviously, it means projects slow down or disappear. But this does not mean China is going away. While it will continue to be a vital market over the long term, what foreign firms should prepare for is a gradual shift in the architecture market toward social infrastructure projects.

So why have some economists been signaling the alarm that China is on it’s way to a resounding POP? Well, they have also been qualifying that prediction with data about how different the Chinese situation is from that of, say, the Eurozone, or the U.S. So, yes, there are all those reports about empty buildings and vacant mega-developments blowing with dust, but not to worry. Most of those were fronted with surplus cash, money to burn—something difficult to imagine when you come from a slow western economy. In the case of China, empty buildings do not necessarily indicate a bubble. What they might indicate is that they have to start thinking about how to allocate investments differently.

Additionally, according to the report, China’s financial sector will be able to absorb any bad investments in the development sector.

China’s banking system provides a vast ocean of cash reserves to weather any financial storm that may come its way. China has set it up so that there are basically no options for locals as to where to put their money. For the most part, it all goes into low-yield savings accounts that pay a criminally-low interest rate. China is flooding in cash and, in a sense, holding the Yuan hostage. What this means is that they have a greater margin for error when and if the shit hits the fan.

The new five-year plan begins to steer the country away from this potentiality by emphasizing social infrastructure as an area to concentrate development investments. Hospitals, housing, schools, senior amenities are all up for some state-sponsored infusions and incentives.

According to a recent article by Bloomberg News, China’s central government does not intend to roll out another hefty stimulus like it did three years ago. What they are proposing instead is a shift away from reliance on state investment to a model of private investment in infrastructure, schools, and health care sectors. Basically trying to get more private money out of the banks and into the economic stream to promote growth. Of course “private” and “state” can mean one and the same in China. More specifically, the idea is that this will gradually wean the state off its dependence on SOES and create an investment climate that is more aligned with actual market forces. Many economists, within and without China, have thought SOES have been granted too much power since the nineties and that they are skewing the economy into the red-hot danger zone.

There will, however, be modest stimulus measures taken by different state agencies, such as the State Council, and the finance ministry. Bloomberg notes that these measures could impact growth by August or September. China is also set to implement policies that would speed up the approval process for major projects.

While mixed-use has dominated in recent years, both state and private investments are going to start shifting toward markets like health care, education, and housing. According to Rosealea Yao of GK Dragonomics, China needs roughly 85 million more urban households to match housing demand.

The state recognizes the need to put some sort of social safety net in place now that the old “iron rice bowl”, which thrived under the communist industrial model, has been dead for many years. Thus, the consumption of social services is becoming more and more vital in “post-communist” China. This is one reason state and private investors are gradually turning their attention to health care and education. What the new economic order in China is producing is a new demand for such social infrastructure projects. Does this mean the mall is dead in China? Not exactly. But mall developments currently attract the wealthiest 10% of the population while the state is starting to turn the energy of the economy toward the other 90% a little more.

Retail will still be there but it is not yet China’s primary mode of consumption. This is true in part because of social inequality. However, if investments in social infrastructure increase, this will help drive social inequality down. By extension, this could give consumer society a shot in the arm. So, for those architects solely doing mixed-use retail, there is still room for growth, but this is tied to the long-term potential of the emerging social sector. This will become an important growth area in the next few years.

As The Economist report notes, China still needs more of everything. What will be important for foreign architects is to adapt and remain agile. Firms may have to run a race that is less based solely on running at full-speed and more a type of combined relay comprised of running, walking, resting, running again, and so on. To expand in China, foreign firms will need to think beyond just working with commercial investment clients doing icon towers and be ready to work with social infrastructure clients. Put another way, in the next few years, foreign architects may very well be doing fewer towers and more hospitals and schools.

Warsaw’s National Stadium wins World Stadium Award 2012

2012-06-18T14:23:00.004+05:30

Designed by gmp Architekten, Warsaw’s National Stadium prevailed against international competition and won the World Stadium Award in the best multi-functional stadium design and most innovative use of technology categories in stadium design. On the occasion of the 2012 UEFA European Football Championship, the stadium was reconstructed on top of the existing – but since 1988 no longer used and dilapidated – earth wall stadium (Stadion Dziesieciolecia), and re-opened in January of this year.

The stadium’s construction consists of two succinct parts – the grandstand built of pre-fabricated concrete components and the steel wire net roof with a textile membrane suspended from freestanding steel supports with inclined tie rods above this. The interior roof consists of a retractable membrane sail which folds together above the center of the pitch. This is also where the four-screen “video cube” is installed so as to provide an optimum view from all seats. The top tier is accessed via 12 arch-shaped, single-flight staircases.

The exterior façade consists of anodized expanded metal that provides another envelope for the actual thermal shell of the interior areas and access steps. The panels with their red and bright silver color scheme appear either closed or transparent, depending on the light angle, and from a distance evoke the image of an artistic composition in white and red, the country’s national colors.

The stadium has been designed as a multifunctional events center and, with its approx. 20,000 sqm of office and conference facilities, comprises a comparatively high proportion of floor space which can be used independently of the stadium operation. These spaces are available for all types of events and include the necessary support facilities.

Architects: gmp Architekten

Location: Doha, Quatar

Design: Volkwin Marg and Hubert Nienhoff with Markus Pfisterer

Project Management: Markus Pfisterer, Martin Hakiel

Project Management (roof): Martin Glass

In cooperation With: J.S.K. Architekci Sp. z o.o. and schlaich bergermann und partner

Structural Design of Roof: schlaich bergermann and partners, Knut Göppert with Knut Stockhusen and Lorenz Haspel, M&E Engineering HTW, Hetzel, Tor-Westen + Partner, Biuro Projektów “DOMAR”

Landscape Design: RAK, Architectura Krajobrazu, Warsaw

General Contractor: Konsorcjum ALPINE BAU DEUTSCHLAND AG, ALPINE BAU GmbH, ALPINE Construction Polska Sp. z o.o., HYDROBUDOWA POLSKA S.A. i PBG S.A.

Client: Narodowe Centrum Sportu Sp. z o.o.

Seats: 55,000

Competition: 2007 – 1st prize

Construction Period: 2008-2011