基于失效包络图的结构倒塌顺序研究

A Research on the Structure Collapsing Sequence Based on the Failure Envelope

给出安全评估理论知识及杆件重要性的评定方法,并利用这两种基本理论对一简单的三层框架进行倒塌顺序研究,仅讨论在水平荷载按比例渐增的情况下,结构从第一个杆件失效到最后结构完全倒塌的全部过程。给出每个阶段在失效包络图中的渐变状态及最终的杆件失效顺序,并与同案例的参考文献进行对比,分析两者的优缺点。

The safety assessment theory and the importance evaluation of the member bar have been presented, to make a research on the collapse sequence of a simple three-layer frame. The whole process has been discussed about from the failure of the first bar to the complete collapse of the structure on condition of a gradually increasing horizontal load proportion. The transition state in each stage and the final failure sequence of member bars in the failure envelope have been given and compared with the concerned studies, to show their advantages and disadvantages.