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本文应用子结构法 ,分析了土 结构相互作用对线性基础隔震体系基频和结构反应的影响。分析模型中 ,上部结构取为具有埋置刚性基础的均质剪切梁式模型 ,地基取为均质、各向同性的粘弹性半空间。上部结构和刚性基础之间设置隔震层。通过对隔震体系反应的传递函数及基于FFT的地震时程反应的分析 ,讨论了地基土柔性、基础埋深和隔震层刚度对于基础隔震体系基频和结构反应的影响。
In this paper, the substructure method is applied to analyze the influence of soil-structure interaction on the fundamental frequency and structure response of the linear base isolation system. In the analysis model, the superstructure is taken as a homogeneous shear beam model with embedded rigid foundation, and the foundation is taken as a homogeneous and isotropic viscoelastic half-space. Isolation between the superstructure and the rigid foundation. Based on the analysis of the transfer function of the response of the isolation system and the analysis of the time-history response based on the FFT, the effects of the flexibility of the foundation soil, the base depth and the stiffness of the isolation layer on the fundamental frequency and structure response of the base isolation system are discussed.