【摘要】 基于有限元理论,采用大型有限元分析软件SAP2000 Nonlinear建立了底部2层框架上部砌体非隔震结构和基础隔震结构的实体模型,并采用非线性时程分析法对此模型进行了3向(2个水平向和1个竖向)地震作用的地震反应分析．分析结果表明,底部2层框架上部砌体结构采用基础隔震技术后。结构的水平地震反应明显低于相应非隔震结构的水平地震反应．尤其是刚度突变的转换层,隔震后水平地震反应降低很多,但基础隔震结构的竖向地震反应有可能会增大,危及基础隔震建筑物的安全．更多还原

【Abstract】 Based on finite element theory, the base-isolated and fixed solid models of masonry structure with concrete frame at lower two stories were established by SAP2000 Nonlinear software. Then, seismic response analysis under the real prerecorded earthquake excitation in three directions (two horizontal and one vertical) was investigated by nonlinear time history analysis method. The results show that the horizontal seismic responses of the base-isolated masonry structure with concrete frames at lower two stories are remarkably less than those of the non-isolated structure, especially in the transition story with abrupt change of stiffness. However, the vertical seismic responses of the base-isolated structure may increase, which will endanger the security of the base-isolated structure.更多还原