中文摘要：

根据我国现行抗震规范对7度0.15g区的钢筋混凝土框架进行结构设计,采用有限元软件PERFORM-3D建立四个框架模型,采用IDA分析方法对结构进行多条地震记录下的弹塑性动力时程计算,以层间位移角对加强边柱之后框架进行易损性分析,给出结构的失效概率和抗储备倒塌系数。在结构质量不变的情况下,结果表明：框架边柱截面大于中柱的结构,超越概率显著降低,抗倒塌能力显著增大,在大震下的倒塌概率明显降低,可采取加强边柱的方法提高结构安全性;边柱大于中柱时,加强边柱,抗倒塌能力明显增加,超越概率明显降低,在大震下倒塌概率降低幅度更大;然而,中柱大于边柱时,增强效果并不明显。

英文摘要：

The RC frames are designed based on the Code for seismic design of buildings in China in seismic zone of fortification intensity 7 with 0. 15 g earthquake acceleration. Four RC frame modals are built using finite element analysis software PERFORM-3D. Then inelastic dynamic analysis is performed under several ground motions with the incremental dynamic analysis method. And seismic vulnerability analysis is conducted with the parameter of story drift angle. The failure probability and CMR of four structures are calculated. In the case of constant structural mass,the conclusions show that： the exceeding probability would be reduced and collapse resistance would be increased remarkably for the structure which side column section is greater than the inner column,and the probability of collapse under rare earthquake significantly reduced,so the ways of strengthen the side column can be taken to improve structural safety; when the side column is greater than inner column,the exceeding probability would be reduced and collapse resistance would be increased significantly by strengthening side column,and the probability of collapse has a greater reduction under rare earthquake; however,when the inner column is greater than the side column,the improvement effect is not obvious.