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为考察一种新型三维多级复合摩擦摆的隔震性能,采用Abaqus有限元软件对结构进行时程动力分析,计算罕遇地震下结构的加速度、层间位移等.对比结构隔震前后的地震响应,该复合摩擦摆既有多级摩擦摆可根据抗震设防目标适时调整结构自振周期的特性,又有碟簧的竖向变刚度、隔震耗能能力.研究结果表明:隔震结构基本自振周期被延长,变形主要集中在隔震层;可在水平和竖向同时达到上部结构“整体平动”的良好隔震效果;经分析可忽略水平和竖向隔震的耦合作用,各自分开计算.
In order to investigate the seismic isolation performance of a novel three-dimensional multi-stage composite friction pendulum, Abaqus finite element software is used to analyze the structure’s time-history dynamics and to calculate the acceleration and displacement of the structure under rare earthquakes. In response, the multi-stage friction pendulum can adjust the natural period of the structure according to the seismic fortification objectives, as well as the vertical stiffness of the disc spring and the energy dissipation of the isolation.The results show that the basic structure of the isolation structure The period of natural vibration is prolonged and the deformation is mainly concentrated in the seismic isolation layer; the good isolation effect of superstructure and “overall translational motion” can be achieved both horizontally and vertically; the coupled effect of horizontal and vertical isolation can be neglected , Separately calculated.