中文摘要：

为了探究大跨隔震结构多维地震作用下的水平隔震效果及竖向结构响应,选取54 m跨度的长方形周边支承网架为研究对象。利用有限元软件SAP2000对结构原型进行时程分析,通过对比数值计算结果与振动台试验结果全面评价结构抗震性能。结果表明：采用隔震技术后,水平地震反应远小于非隔震结构;三向地震作用时,隔震结构网架节点最大竖向加速度分布不同于非隔震结构。因此,隔震结构可通过降低水平地震引起的竖向振动,达到减小网架竖向地震响应效果。

英文摘要：

In order to investigate the horizontal isolation effect and vertical response of long-span isolated structure under multi dimensional seismic excitation,a rectangular four-sides supported space truss model with span of 54 m was selected. Seismic time-history analysis was conducted by usingfinite element software SAP2000. The numerical results were compared with the shaking table test results. The results showed that the horizontal dynamic response of isolated structures decreased. The maximum vertical acceleration distribution of the isolated structure was different from that of the non-isolated structure.After using isolation technology,the vertical response of gird was weakened with the decrease of the vertical vibration that caused by of horizontal earthquake.