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    邢銀行，  李章政，  簡  超
    （四川大學(xué)建筑與環(huán)境學(xué)院，成都 610065）

[摘要] 以一棟4層鋼筋混凝土框架隔震結(jié)構(gòu)為例，采用兩種方法進(jìn)行pushover分析。對(duì)上部結(jié)構(gòu)進(jìn)行推覆分析得到上部結(jié)構(gòu)的能力譜，通過折減系數(shù)得到上部結(jié)構(gòu)的需求譜，進(jìn)而可以得到上部結(jié)構(gòu)的性能參數(shù)。對(duì)隔震結(jié)構(gòu)直接進(jìn)行pushover分析，得到隔震結(jié)構(gòu)在罕遇地震作用下的性能參數(shù)。兩種方法得到的結(jié)果接近。pushover分析隔震結(jié)構(gòu)的抗震性能，在工程實(shí)踐中具有一定的參考價(jià)值。
[關(guān)鍵詞] 隔震結(jié)構(gòu)；靜力彈塑性分析；罕遇地震
中圖分類號(hào)：TU311.3  文獻(xiàn)標(biāo)識(shí)碼：A  文章編號(hào)：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