基于抽柱法的盒式结构连续倒塌分析  

Progressive Collapse Analysis of Box Structure Based on the Method of Removing Column

作　　者：毕永辉[1] 马克俭[1] 才琪[1] 

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550003

出　　处：《贵州大学学报（自然科学版）》2017年第1期89-94,共6页Journal of Guizhou University:Natural Sciences

基　　金："十二五"国家科技支撑计划(2011BAJ09B01-01);贵州省科技创新人才团队建设([2014]4012);贵州大学研究生创新基金资助(研理工2017062)

摘　　要：为了研究盒式结构的抗连续倒塌能力,基于大型有限元软件ANSYS,采用抽柱法对盒式结构进行动力非线性分析。对柱失效时间的取值、柱失效位置的选取等问题进行研究,得到了剩余结构动力效应与柱失效时间的关系曲线和不同柱破坏位置下各失效柱顶点的位移时程曲线。分析结果表明:结构的动力效应随着柱失效时间的减小而减小。采用抽柱法对盒式结构进行连续倒塌分析时,建议失效时间选取剩余结构失效柱顶部楼板竖向振动周期的1/10。失效柱位置和层数对盒式结构抗连续倒塌能力影响较大。与长边中柱和角柱相比,短边中柱对结构抗连续倒塌能力影响最大。层数越多盒式结构的抗连续倒塌能力越强。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.

关 键 词：连续倒塌 盒式结构 失效时间 动力非线性分析 抽柱法 

分 类 号：TU391[建筑科学—结构工程]