赵  昕   李  杰
    （同济大学建工系  上海 200092）

[提要]  与基底隔震相比，层间隔震结构的隔震垫不直接和地基相连，而是置于层间，这就带来了层间结构有限元分析的困难。如何模拟单元之间的隔震垫是层间隔震结构有限元分析的关键。提出了层间隔震结构有限元分析中隔震垫的有限元模型，并从静力、模态两方面进行了验证。由于层间结构的隔震层阻尼比一般较高，在对结构的模态分析中，使用了复模态方法。
[关键词]  层间隔震结构  隔震垫  有限元模型  复模态

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