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层间隔震结构是基础隔震结构的发展与延伸,作为一种复杂结构体系,基础隔震结构的工作机理不一定完全适合,延长结构的周期可能无法同时降低上、下部结构的地震响应。此类体系以往的理论及试验研究,隔震层的阻尼多由铅芯橡胶支座提供,采用天然橡胶支座及黏滞阻尼器作为隔震层,进行了层间隔震结构振动台试验研究。设计了一个4层的钢框架模型,依次进行了基础固接、基础隔震、1层顶隔震、2层顶隔震及3层顶隔震的振动台试验研究,测定结构的加速度、层间位移及层剪力系数。试验结果表明:黏滞阻尼器层间隔震结构具有良好的减震效果。建立了层间隔震结构的有限元模型,将有限元分析结果与试验结果进行了对比。
As a kind of complex structural system, the working mechanism of the base isolation structure may not be completely suitable. It may not be possible to reduce the seismic response of the upper and lower structures simultaneously by extending the period of the structure. In this kind of system, theoretical and experimental researches have shown that the damping of the isolation layer is mostly provided by the lead rubber bearing, and the natural rubber bearing and the viscous damper are used as the isolation layer. A four-story steel frame model was designed and the shaking table tests of foundation fixing, foundation isolation, 1-storey top isolation, 2-storey top isolation and 3-storey top isolation were carried out in turn. The acceleration of the structure, Between the displacement and shear coefficient. The experimental results show that the viscous damper interlayer isolation structure has a good damping effect. The finite element model of the layered seismic isolation structure is established, and the finite element analysis results are compared with the experimental results.