基于两次推覆分析考虑损伤效应的结构抗震性能评估  

Seismic Performance Analysis of Structures Considering Damage Effect Based on Twice Pushover Analysis

作　　者：黄维[1] 钱江[1] 庄彬彬 

机构地区：[1]同济大学土木工程防灾国家重点实验室,结构工程与防灾研究所,上海200092 [2]深圳中广核工程设计有限公司,深圳518029

出　　处：《结构工程师》2011年第5期111-115,共5页Structural Engineers

基　　金：国家自然科学基金项目(980815029,5102114006);科技部国家重点实验室基金资助(SLDRCE10-B-07);973国家重点基础研究发展计划项目(2007CB714202)

摘　　要：结构的损伤状态通常用损伤指标表征,损伤指标的计算可以基于结构强度或基于结构的响应。基于两次POA计算结构损伤指数的方法,提出一种考虑损伤效应的结构抗震性能简化计算方法,以拟静力循环往复加载模拟结构损伤过程,与Pushover能力谱法相结合,评价不同损伤情况下结构的抗震性能。通过对一个单跨三层钢筋混凝土框架结构的有限元模型进行考虑损伤效应的抗震性能分析,结果表明该方法简单、合理、可靠。The damage index whose calculation is based on structural strength and response can be used to identify the structural damage status.Based on the method of structural damage index calculation with two-step pushover analysis procedure,a simplified method to analyze the seismic performance of buildings considering the damage effect was proposed in this paper.Response analysis of the structure under cyclic loading of certain intensity was first performed to produce designed damage in the structure,and then a static pushover analysis was carried out in consequence taking into account the residual strain.A single span three-story RC frame is constructed by using the fiber beam element,so as to evaluate the seismic performance considering the damage effect.Analysis Results illustrated that this method is a simple,reasonable and reliable one to evaluate the seismic performance of buildings considering the damage effect.

关 键 词：两次推覆分析 循环往复静力加载 静力弹塑性分析 损伤效应 

分 类 号：TU352.11[建筑科学—结构工程] TU312.3