这是有关加拿大天空穹顶,这也是世界著名的开合结构:SkyDome is the first and only stadium to have a fully retractable roof. When the weather is good,usually from April 1-October 1,we are able to roll back the roof ,uncovering the complete field area and over 91% of the seats. The roof consists of four panels. One panel is fixed, and the other three are moveable. Panel One rotates around 180 degrees while Panels Two and Three telescope straight forward. The roof runs on a system of steel tracks and bogies. There are 76 bogies altogether, with 10 horsepower motors inside for a total of 760 horsepower. It takes 20 minutes for the roof to open or close as it moves at a rate of 71 feet(21 metres ) per minute.The roof is made up of steel trusses covered by corrugated steel cladding. Covering the cladding(acting as a weather-proofing) is a PVC single ply menbrane. It weighs 11000 tons, the same weight as 3734 automobiles.The roof spans eight acres and rises 282 feet (from field level )at its highest point. There are 250000 bolts in the roof作者:
jgwyd 时间: 2002-11-27 16:33 标题: 回复: 关于开合结构的想法