Bad vibrations

时间:2019-03-06 10:04:06166网络整理admin

By Ian Sample ENGINEERS who designed London’s wobbly Millennium Bridge admitted last week that the computer simulations they used to model its behaviour couldn’t cope with the effect of people walking across it. The blunder, say observers, resulted from an out-of-date standard for testing bridges and poor dissemination of information in the industry about previous incidents. The 320-metre footbridge over the Thames, which cost £18 million, was closed on its opening weekend last month, when it was found to wobble more than expected. Since then Arup, the engineering firm responsible for the bridge,