钢结构加层混凝土框架结构Pushover分析侧向力分布研究  

Research on lateral load distribution method for RC frame structures with steel adding storey in pushover analysis

作　　者：宗钟凌[1] 吕凤伟 

机构地区：[1]淮海工学院土木工程学院,江苏连云港222005 [2]连云区政府工程预决算中心,江苏连云港222005

出　　处：《世界地震工程》2010年第3期204-208,共5页World Earthquake Engineering

摘　　要：针对钢结构加层混凝土框架结构,考虑地震作用下其层间刚度变化的影响,提出了一种计算侧向力分布的方法——层间刚度侧向力分布法。通过对一钢结构加层混凝土框架结构进行推覆分析,得到各楼层侧移、层间位移角和塑性铰分布情况,并与时程分析结果进行了比较分析。结果表明,文中方法推覆分析得到的楼层侧移和层间位移角与时程分析结果吻合较好,塑性铰分布情况也较一致,并且本方法得到的推覆曲线是推覆计算结果的下限,用于结构的抗震评估更安全。Considering the inter-story stiffness changes caused by the earthquake load,a calculated method of the lateral load distribution for RC frame structures with steel adding storey is presented.Through pushover analysis and nonlinear time-history（NTH） analysis,the method is validated by comparing response quantities such as story displacement,inter-story drift ratio,and distribution of plastic hinges.It is shown that the distribution of plastic hinges obtained from pushover analysis is accorded with that of NTH analysis under practical earthquake load;story displacement and inter-story drift ratio are also in accord with the result of NTH analysis.

关 键 词：侧向力分布 钢结构加层 推覆分析 层间刚度 

分 类 号：TU375[建筑科学—结构工程] P315.95[天文地球—地震学]