Stability of the World Trade Center Twin Towers Structural Frame in Multiple Floor Fires
Stability of the World Trade Center Twin Towers Structural Frame in Multiple Floor Fires
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DOI：
10.1061/(asce)0733-9399(2005)131:6(654
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
A. Usmani
中科院分区：
文献类型：
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作者：
A. Usmani
本技术说明介绍了对遭受火灾的世贸中心双塔结构框架的非常简单的二维模型进行非线性有限元分析的结果。该分析是针对大范围的火灾场景进行的，并在最近发表的一篇论文中进行了详细报道。本文进一步研究了该分析的结果，以获得所发现的塌陷机制的详细信息。一系列有趣的事件逐渐导致整体崩溃被发现并被详细描述。发现失败的主要原因是复合钢桁架和混凝土板楼盖系统的膜抗压能力低。
This technical note presents the results from a nonlinear finite element analysis of a very simple two dimensional model of the World Trade Center Twin-Towers structural frame subjected to fire. The analysis was carried out for a large range of fire scenarios and was reported in detail in a recently published paper. The paper further investigates the results of this analysis to obtain the details of the collapse mechanism found. An interesting series of events leading progressively to overall collapse are discovered and described in detail. The main reason for the failure is found to be the low membrane capacity in compression of the composite steel truss and concrete deck slab floor system.