区域火灾作用后RC结构弹塑性抗震分析

Elastic-plastic Seismic Performance of RC Structure after Local Fire

目前,火灾后混凝土结构的抗震性能研究大部分主要集中在梁、柱等单个构件上,对于结构的整体抗震性能研究比较少。选取规则的5层钢筋混凝土框架结构为计算模型,基于静力弹塑性分析方法,运用SAP2000有限元软件分析区域火灾作用后框架结构整体弹塑性抗震性能的变化,所提出的结论主要针对以剪切变形为主的规则框架结构,在火灾作用后建筑物结构性能的检测和损伤评定中具有参考意义,为工程实际中钢筋混凝土框架结构火灾后的损伤评估与鉴定工作提供一定的参考依据。

So far,the research work about evaluating the after-fire performance of structure focuses only on single members such as beams and columns,little work has been done to evaluate the whole seismic performance of structure.Based on the static elastic-plastic analysis method,finite element analysis software SAP2000 is used to analysis the whole change of the elastic-plastic seismic performance of a frame structure suffered local fire.The main conclusions,proposed for the rule frame structure according to shear deformation,provide some references for practical reinforced concrete frame structure in judging the performance of damaged structure and assessing and appraising the structure after fire