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设计北京地区某五层钢框架层间隔震结构,以及1∶8缩尺层间隔震振动台试验模型,建立有限元分析模型对隔震层在不同层位置和不同近断层地震动输入下的动力响应进行分析。结果表明:随着隔震层位置上移,原型结构和缩尺模型第一自振周期减小,隔震层位移减小,最大层间剪力和顶层加速度增大,输入能量减小但顶层隔震时有所增大,原型结构和缩尺模型动力响应符合相似关系;隔震层在不同层位置时,不同近断层地震动对隔震结构的动力响应影响不同。
A five-story steel frame inter-story seismic isolation structure in Beijing area and a 1: 8 scale inter-seismic isolation shaking table test model are designed. The finite element model is established to simulate the dynamic response of the isolation layer at different layer positions and different near-fault ground motions Response to analyze. The results show that as the location of the isolation layer moves upwards, the first natural period and the displacement of the isolation layer decrease, the maximum interlaminar shear force and the top acceleration increase, but the input energy decreases but the top layer The dynamic response of prototype structure and scale model accord with the similar relationship. When the isolation layer is in different layers, the dynamic response of different near-fault ground motions to isolation structure is different.