带预应力厚层橡胶支座隔震结构竖向地震反应谱分析

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英文篇名：Analysis on vertically seismic response spectrum about seismically isolated structure with PRB 作者：刘旭宏 ; 黄凯 英文作者：Liu Xuhong;Huang Kai;The College of Civil Engineering, Fuzhou University; 关键词：PRB ; 反应谱 ; 拉索 ; 竖向隔震 英文关键词：PRB;;response spectrum;;flexible cable;;vertically seismic isolated 中文刊名：JCJG 英文刊名：Building Structure 机构：福州大学土木工程学院; 出版日期：2019-04-15 出版单位：建筑结构 年：2019 期：v.49 语种：中文; 页：JCJG2019S1098 页数：5 CN：S1 ISSN：11-2833/TU 分类号：484-488

摘要

根据预应力厚层橡胶支座(PRB)的工作机理,建立了带PRB隔震结构的竖向隔震分析模型并推导相应的运动微分方程,研究了带PRB隔震结构竖向地震反应谱的特点,并通过算例分析了PRB竖向隔震、限位效果。研究表明:PRB对结构有竖向隔震功能,拉索可以防止支座出现受拉现象。同时,确定了PRB设计中的最优刚度比β=1.46,使得PRB的竖向隔震限位效果达到最佳。
        According to the prestressed thick rubber bearing's working principle, analytical model of vertically seismic isolation and the corresponding motion equationes were established. Furthermore, the characteristic of the vertically seismic response spectrum about seismically isolated structure with PRB was studied. Then, the effect of PRB's vertically seismic isolation and its limiting about displacement was analysed. The results show that PRB has the capacity of vertically seismic isolation and flexible cable can effectly prevent the bearing from tension. Furthermore, when the PRB's stiffness ratio is 1.46, it has the best capacity of vertically seismic isolation and limiting about displacement.

引文

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