mmm… guess somebody miscalculated the snow loads here…
On Sunday 12th December 2010 the inflatable roof of the Metrodome – the Minnesota Vikings’ stadium – collapsed under extreme snow load. The extent of the damage is huge, but fortunately nobody was hurt. According to media report, more than 40cm of fresh snow came down in the heavy snow storms that heat the city’s area. This is not the first incident; the roof had already collapsed under similar circumstances in 1981, 1982 and 1983. The Vikings are therefore planning to build a new stadium and say goodbye in the next season to the Metrodome.
Here’s a video explaining the construction method of the steal masts and cables that will support the BC place’s new roof.
This is a link to a very interesting video broadcasted on the Discovery Channel, showing the 1:1 experimental model of two segments of the retractable roof, that was set-up in Sunnyside, United States. The model is meant to test the behavior under various weather conditions of what will be the world’s largest retractable roof.
Worth watching! For the interesting part skip to 09:50. link.
The Iconic inflatable roof of the BC Place Stadium in Vancouver, Canada – aka the “giant marshmallow” – was finally deflated last may.
(Credit: John Bollwitt via Flickr)
(Credit: maplemusketeer via Flickr)
The existing pneumatic dome is to be dismantled and replaced with a partially fixed, partially retractable fabric roof as well as a transparent membrane façade.
When completed, this roof will be the largest cable-supported retractable roof in the world. The projected area of the retractable portion of the roof is approximately 6,700m², requiring a total of approximately 13,400m² of membrane material.
The project’s estimated budget is $458 million, and it is scheduled for completion by summer 2011.
The new roof would cut energy costs at the stadium by one quarter, or about $350,000 per year.
The contract will involve the fabrication and installation of the complete retractable portion of the membrane roof system in Tenara membrane, a woven, high translucency PTFE fabric, as well as the façade system to be fabricated from a transparent membrane with a light-controlling frit pattern. The design work will commence immediately, with completion planned to take place in mid 2011.
The new roof substructure consists of radial cable net and outer steel columns. The fabric roof is divided up into 36 fixed outer panels and 36 inner retractable segments. The outer fixed roof, to be the subject of a separate contract, has an area of about 34,000m². The inner roof will consist of a double layer Tenara membrane with an inflated inter-space to form “cushion” elements.
The cushions will be pre-stressed using hydraulic tensioning units and inflation via fan units. The retractable roof will be connected to the 36 radial cables by specially designed sliding and driving carriages. The deflated cushion will be stored at the centre of the roof in a membrane garage. To close the roof, the driving carriages will pull the membrane outwards radially towards the perimeter. The retractable roof is made of a highly translucent fabric which will allow the fabric to be folded without damage.
The new façade comprises some 6,000m² of transparent membrane panels using ETFE. The facade panels are pre-stressed using metal arches and are attached directly to the primary steel structure.
I will be presenting in the event, together with Eng. Iago González Quelle, the lecture “Tensile Structures. Interdisciplinary Teamwork as win-win Situation “.
We will be sharing our professional experience together and highlight the importance and benefits of a cross-disciplinary collaboration between architects and engineers in the design of tensile structures. In effect, one of the most distinctive aspects of tensile architecture is that architectural design and structural engineering are intrinsically engaged from the earliest phase of the planning process. This alliance affects significantly the aesthetic qualities of the project.
We will also addresses the potential of parametric design in the field of membrane architecture.
The conference will focus on the recent developments in the construction field and intends to stimulate and promote interdisciplinary teamwork between Architects and Structural Engineers.
Japan Pavilion is a 24 meters high construction of double-layer ETFE cushions mounted on a lightweight steel frams. With its approximately 6,000m² plot It will be among the largest of all foreign pavilions at Expo 2010 Shanghai China.
More after the break.
Continue Reading “The Japanese Pavilion for Expo 2010″
HOT AIR is an iconic head-shaped inflatable and inhabitable monument, Designed by Anca Trandafirescu, an architect and assistant professor in architecture at the University of Michigan, to commemorate the 20th anniversary of the fall of communism in Romania.
The idea behind Trandafirescu’s design of an anonimous head of an overthrown statute is that “the contradictions of optimism AND instability inherent in Romania’s political change are reflected in the mass, material, and construction of a symbolic image filled with HOT AIR.”
The project was mounted on Noveber 3-7 2009 in Piata Victoriei, Timisoara, Romania where the first large demonstrations in the country took place and eventually led to the fall of the dictatorship.
The designer herself with the assistance of Le Nguyen built this impressive inflatbale structure manualy. The patterning and cutting of the polyethylene plastic sheets was done exclusively by hand, using physical models, and the welding was done with a simple household iron.
South African architect Michael Elion designs a 560sq helium filled Halo structure that floats above the National Archives in Paris, as part of the French capital’s Nuit Blanche, the annual all-night arts festival.
The pink fluorescent-lit structure is made of Dtex high tenacity nylon fabric with a polyurethane coating and is stabilized by 12 control cables attached to 100kg concrete weights and a pulley system attached to two trucks, a car and two tonnes of sand which act as ballast.
Made of Dtex high tenacity nylon fabric with a polyurethane coating, the structure is lit with 24 fluorescent lights and controlled by a remote control winch and pulley system attached to a forklift truck, another truck, a car and two tonnes of sand which act as ballast.