【摘要】 建筑物遭受火灾作用后,不同部位构件的损伤将导致结构整体性能会有不同程度的下降,对结构的抗震性能也有显著的影响。目前,关于火灾后建筑物的受损研究,主要集中在对梁、柱等单个构件上,对于结构的整体抗震性能研究比较少。文章以常见的三维空间杆系模型为基础,利用等效截面法估算结构构件受火后剩余承载力;采用SAP2000有限元分析软件进行建模计算,对比分析区域火灾作用后框架结构整体抗震性能的变化,总结不同区域楼层梁、柱构件分别受火对结构整体抗震性能的影响,为结构加固设计提供依据。更多还原

【Abstract】 After being exposed to fire,the different level damage of structural members at different locations would suffer different deteriarations of structural performance,as a result,the seismic performance of the structure is influenced.So far,the research work about evaluating the after-fire performance of structures focus only on structural members such as beams and columns,little work has been done to evaluate the seismic performance of whole structure.With the common three-dimensional truss structural mode.This paper estimated the after-fire capacity of structures though equivalent section method.Then,with the object of summarizing the effect of fire suffered by structural members at different locations on the seismic performance of whole structure,the finite element analysis software sap2000 was used to compare and analyze the change of the seismic performance when the structure suffered local fire.更多还原