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    趙  昕   李  杰
    （同濟(jì)大學(xué)建工系  上海 200092）

[提要]  與基底隔震相比，層間隔震結(jié)構(gòu)的隔震墊不直接和地基相連，而是置于層間，這就帶來了層間結(jié)構(gòu)有限元分析的困難。如何模擬單元之間的隔震墊是層間隔震結(jié)構(gòu)有限元分析的關(guān)鍵。提出了層間隔震結(jié)構(gòu)有限元分析中隔震墊的有限元模型，并從靜力、模態(tài)兩方面進(jìn)行了驗(yàn)證。由于層間結(jié)構(gòu)的隔震層阻尼比一般較高，在對(duì)結(jié)構(gòu)的模態(tài)分析中，使用了復(fù)模態(tài)方法。
[關(guān)鍵詞]  層間隔震結(jié)構(gòu)  隔震墊  有限元模型  復(fù)模態(tài)

Comparing with base isolated structure, the rubber bearing of storey isolated structure is not connected to foundation directly, but is placed between storeys, which brings many difficulties into the finite element analysis of isolated structure. This paper develops a type of finite element model of rubber bearing to analyze the simulator of rubber bearing in storey isolated structure. The static and modal properties of the finite element model validate the effectiveness of proposed model. Considering the large damping ratio of isolation storey, complex modal method to analyze storey isolated structure is used, and the influence of the damping ratio of isolation storey is discussed.
Keywords:  storey isolated strucutre; rubber bearing; finite element model; complex modal method