基于杆件灵敏度的结构易损性分析

Vulnerability analysis of structures based on member sensitivity

结构易损性和连续倒塌分析成为近年来国内外结构研究的焦点。从结构体系的应变能入手,提出了一种基于杆件灵敏度的结构易损性分析方法。根据杆件灵敏度与构件重要性之间的关系,通过逐次删除具有最大灵敏度系数的构件,可以获得结构的失效模式,由此找出结构中的薄弱构件。分别以平面桁架和空间星型网穹结构为算例,对提出的方法进行了分析验证,并分别与相关文献及ANSYS软件计算的结果进行比较,表明将该方法用于结构易损性分析是有效可行的。

In recent years, it is a focus to study the structural vulnerability and progressive collapse. Starting from the view of structural strain energy, we propose a new structural vulnerability analysis method based on the sensitivity of members. We can obtain the failure mode by gradually moving out those members with maximal sensitivity according to the relationship between the member sensitivity and component importance, thus the weak members in the structures are determined. Two practical examples, a plane trusses and a special star reticulated dome, are given to illustrate and verify the presented method by comparing the results with other results obtained by ANYSY and related papers.