邢银行，  李章政，  简  超
    （四川大学建筑与环境学院，成都 610065）

[摘要] 以一栋4层钢筋混凝土框架隔震结构为例，采用两种方法进行pushover分析。对上部结构进行推覆分析得到上部结构的能力谱，通过折减系数得到上部结构的需求谱，进而可以得到上部结构的性能参数。对隔震结构直接进行pushover分析，得到隔震结构在罕遇地震作用下的性能参数。两种方法得到的结果接近。pushover分析隔震结构的抗震性能，在工程实践中具有一定的参考价值。
[关键词] 隔震结构；静力弹塑性分析；罕遇地震
中图分类号：TU311.3  文献标识码：A  文章编号：1002-848X(2011) Sl-0191-04

Pushover analysis of isolated structures
Xing Yinhang, Li Zhangzheng, Jian Chao
( College of Architecture and Environment, Sichuan University, Chengdu 610065, China)

Abstract: Based on a four layers of reinforced concrete frame base-isolated structures, two kinds of pushover analysis methods were used. The ability spectrum of upper structure was got through pushover analysis of upper structure. Through the reduction factor, the demand spectrum of upper structure and the upper structure performance parameters could be got. The performance parameters of the base-isolated structures under severe earthquake were obtained directly by pushover analysis. Two methods get similar results. Pushover analysis of the seismic-isolation structure anti-earthquake
performance has certain reference value in engineering.
Keywords: isolated structure; pushover analysis; severe earthquake