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首页> 外文会议>International Symposium on Safety Science and Technology; 20061024-27; Changsha(CN) >Sensitivity Index on Load Carrying Capacity of Framed Structures to Member Disappearance
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Sensitivity Index on Load Carrying Capacity of Framed Structures to Member Disappearance

机译：框架结构承载力对构件消失的敏感性指标

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摘要

A sensitivity index of vertical load carrying capacity to member disappearance is proposed for a framed structure. The index is defined as the ratio of the load carrying capacity after a member or set of adjacent members disappears to the original load carrying capacity. The member or the set of members that has the highest index might be regarded as a key element or an Achilles heel of the frame. Countermeasures against accidental events or attacks might then be multiple protection of such an Achilles heel. This study uses an efficient linear-programming technique Compact Procedure to evaluate the load carrying capacities before and after the member disappearance. Planar and 3D frame models are used to evaluate the sensitivity index on vertical load carrying capacity to member disappearance. These studies reveal basic properties of structural sensitivity to member disappearance: (1) For a strong floor-beam system, corner columns are more important than central columns; (2) Violation of symmetric column layout usually results in high sensitivity.
机译：针对框架结构，提出了竖向承载力对构件消失的敏感性指标。该指数被定义为一个构件或一组相邻构件消失后的承载能力与原始承载能力之比。具有最高索引的成员或成员集可被视为框架的关键元素或致命弱点。因此，针对意外事件或攻击的对策可能是对这种跟腱的多重保护。这项研究使用有效的线性编程技术“紧凑程序”来评估构件消失前后的承载能力。平面和3D框架模型用于评估构件垂直消失能力对构件消失的敏感性指数。这些研究揭示了结构对构件消失的敏感性的基本特性：（1）对于强大的楼梁系统，角柱比中央柱更重要； （2）违反对称色谱柱布局通常会导致高灵敏度。

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