2001-09-13 Why Did the World Trade Center Collapse

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<hide> <let name=data index=Date>2001-09-13</let> <let name=data index=Authors>\Zdenek P. Bazant\Yong Zhou</let> <let name=data index=Source>Journal of Engineering Mechanics ASCE</let> <let name=data index=Topics>\9-11/official/papers\9-11</let> <let name=data index=URL>http://web.archive.org/web/20011031095744/http://www.tam.uiuc.edu/news/200109wtc/</let> <let name=data index=Title>Why Did the World Trade Center Collapse? – Simple Analysis</let> <let name=data index=TitlePlain>Why Did the World Trade Center Collapse?</let> <let name=data index=Text>

This paper presents a simplified approximate analysis of the overall collapse of the towers of World Trade Center in New York on September 11, 2001. The analysis shows that if prolonged heating caused the majority of columns of a single floor to lose their load carrying capacity, the whole tower was doomed. The structural resistance is found to be an order of magnitude less than necessary for survival, even though the most optimistic simplifying assumptions are introduced.

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<let name=data index=TextShort>“The analysis shows that if prolonged heating caused the majority of columns of a single floor to lose their load carrying capacity, the whole tower was doomed. The structural resistance is found to be an order of magnitude less than necessary for survival, even though the most optimistic simplifying assumptions are introduced.” </let> </hide><if not flag=$including><let name=docat val=1 /><call ShowLinkData /></if>