纽约世界贸易中心倒塌有限元仿真
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世界贸易中心飞机撞击后倒塌过程的仿真分析
Dynamic Finite Element Simulation for the Collapse of World Trade Center
土木工程学报,China Civil Engineering Journal,34(6), 2001,8~10
摘要：本文利用动力有限元程序LS-DYNA对纽约世界贸易中心受飞机撞击后的倒塌进行了力学分析和仿真，并根据计算结果进行了参数讨论。仿真计算的结果与真实倒塌过程非常接近，说明通过适当的选取计算参数和计算模型，可以对这种特殊的复杂破坏过程进行模拟分析和仿真。计算结果说明，世界贸易中心倒塌的直接原因是火灾导致的钢材软化和楼板塌落冲击荷载引起的连锁反应。如果能够提高结构的抗火能力或者提高结构的延性，将有可能避免结构倒塌，避免惨剧再次发生。
关键词：动力有限元，世界贸易中心，倒塌
Abstract:
Simulation for the Collapse of World Trade Center is processed in this
paper with the finite element software of LS-DYNA. The parameters used
in the simulation are discussed with the numerical results. The simulation
is very close to the real conditions, which means that using proper
numerical model can simulate such complex problems as the collapse of
large building. The numerical results also show that the softening of
steel under fire and impact load of top floors are the two main reasons
for the collapse. If improving the steel fire-resistant ability or enhancing
the ductility of the structure, the collapse can be avoided.
Keywords: dynamic
finite element, world trade center, collapse of tall building
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