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Progressive Collapse Analysis of Box Structure Based on the Method of Removing Column
BI Yonghui， MA Kejian*， CAI Qi
（Space Structure Research Center， Guizhou University， Guiyang 550003， China）
Abstract：
The finite element software ANSYS and the method of pumping column are used to analyze the dynamic nonlinear reaction of the box structure in order to study the anti progressive collapse capacity of box structure. The value of column failure time and the location of the failure column in the box structure were researched to get the relationship between dynamic effect of residual structure and the column failure time and the displacement time history curves of failure columns under different column failure positions. The analysis results show that： the dynamic effect of structure decreases with the decrease of the time of column failure， The failure time should be chosen 1/10 of the vertical vibration period of the top floor of the remaining structure in the progressive collapse analysis of the box structure. The effects of the failure column position and the number of layers have a great influence to the progressive collapse resistance of the box structure. Compared with the columns at the large side and the corner of the box structure， the columns at the short side have a greater impact in the capacity to resist progressive collapse. The more number of layers in the box structure， the stronger ability of resistance to progressive collapse.
Key words：
progressive collapse； the box structure； failure time； nonlinear dynamic analysis； pumping column method
推荐访问： 倒塌 连续 结构 分析 抽柱法
