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标题: 世界上“最大的”充气膜结构刚刚塌了 [打印本页]

作者: cheops    时间: 2007-1-6 06:46     标题: 世界上“最大的”充气膜结构刚刚塌了

位于加拿大温哥华。
  
已经活了20多年了,个人猜想应该是养护问题引起的。
  
The roof at B.C. Place stadium collapses
Exclusive: Viewer submitted cellphone photo of a tear in the fabric of B.C. Place's roof early Friday.
  
Vancouver Sun
Published: Friday, January 05, 2007
  
The roof at B.C. Place stadium has collapsed.
  
The fabric roof fell into the empty stadium shortly after noon today.
  
The cause was not immediately determined, Vancouver has suffered all morning from a combination of bitter cold, strong winds and heavy sleet.
  
The roof is held up by air pressure, so even a tiny tear in the fabric could cause the roof to collapse. The stadium is home to the B.C. Lions football club, and its construction was completed in 1983.
  
B.C. Place Stadium, the world’s largest air-supported domed stadium, holds more than 60,000 seats and is covered by Teflon-coated fibreglass fabric that is 1/30 inch thick but stronger than steel.
  
Until today, B.C. Place was the world’s largest air-supported domed  stadium covering 10 acres in all, with a circumference of 760 metres (2,500 feet), according to the stadium's website.
  
There are two layers of fabric with a four-foot space between them.
  
When it snows, like today, hot air is supposed to be pumped between these layers to melt 12 centimetres of snow per hour.
The total thickness of each layer  of roofing material  is only 1/30 inch (0.85 millimetres).
  
Electric-powered fans keep the air pressure inside the stadium at a higher level than the air outside. There are no beams in the roof -- extra air pressure is the only thing that supported the roof.
  
If the fans were turned off and the doors shut, it would take four to six hours to deflate the roof -- but spectators today said the roof collapsed within minutes.
  
As well as being home field to the B.C. Lions football team, the stadium has used for concerts, trade shows and concerts.
  
It has hosted Queen Elizabeth, Pope John Paul II, Prince Charles and Lady Diana and Bill Clinton.
  
The Rolling Stones, U2, The Three Tenors, Pink Floyd and the Beach Boys have played there.
  
The stadium was slated to play a prime role in the 2010 Olympic Winter Games as the venue of the opening and closing ceremonies.
  
The Vancouver Sun is following this story. If you have any information, please e-mail sunnewstips@png.canwest.com.
  
More details to come.
[$#169] Vancouver Sun 2007
作者: azh0402    时间: 2007-4-6 13:29     标题: 回复: 世界上“最大的”充气膜结构刚刚塌了

看着象是膜与肋间断裂造成的吧.是不是因为时间太长强度退化的缘故.
作者: xzxrd    时间: 2007-5-6 16:06     标题: 回复: 世界上“最大的”充气膜结构刚刚塌了

是不是膜材料本身的问题呢?总之和养护应该有很大关系!
作者: arcok    时间: 2007-5-13 11:41     标题: 回复: 世界上“最大的”充气膜结构刚刚塌了

疲劳致其塌, 疲劳效应对膜结构是很强的!
作者: hi2006    时间: 2007-5-16 18:47     标题: 回复: 世界上“最大的”充气膜结构刚刚塌了

20多年了,也不错了.不知是什么膜材,是PTFE吗?
作者: lake    时间: 2007-5-17 22:57     标题: 回复: 世界上“最大的”充气膜结构刚刚塌了

若有此次事故的鉴定结果就好了。
作者: ilutao    时间: 2007-5-30 17:49     标题: 回复: 世界上“最大的”充气膜结构刚刚塌了

世界上最大的室内体育馆应该是美国的"Silver Dome   Pontiac, Michigan, USA"
有座位80,000!
钢索安装,每方向9根,共18根钢索.用直升飞机吊装的,很节省时间,首次充气时间85分钟.
这种充气的屋顶容易维修,如果其它的膜没有问题的话,把那块破的膜换了就可以了.整个屋顶质量轻得很,每平米约20KG,不会有大的安全问题!
  
膜结构,盖格公司应该很有权威性!  
  
现在,巨盖式的膜结构比充气式的有一个好处就体现出来了,那就是巨盖式的不会因为一个膜坏了而垮塌!




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