预应力厚层橡胶支座隔震性能研究  

Research on isolating property of prestressed thick rubber bearings

作　　者：邹立华[1] 饶宇[1] 黄凯[1] 郭润[1] 许志旭[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《建筑结构学报》2013年第2期76-82,共7页Journal of Building Structures

基　　金：国家自然科学基金项目(51108091)

摘　　要：针对现有隔震支座的不足,在普通叠层橡胶隔震支座(RB)的基础上,适当增大橡胶层厚度,结合预应力原理,提出一种新型的预应力厚层橡胶隔震支座(PRB)。在模型试验的基础上,建立其隔震结构非线性分析模型,推导了其水平刚度计算解析公式,编制相应的分析程序,分析和研究其工作原理及力学性能;通过时程反应分析,研究了其隔震性能。研究结果表明:PRB是水平变刚度支座,刚度大小与支座的水平位移等有关;它除具有RB的水平隔震性能外,还具有良好的水平限位等性能,地震强度越大,水平限位性能越好。To overcome the shortage of existing rubber bearings（RB）,a new type of isolator,prestressed rubber bearing（PRB）,is presented in this paper,which was invented by amplifying appropriately the thickness of rubber layers in conventional laminated rubber isolator combining the prestressing principle.Based on the test results,the nonlinear analytical model of isolated structures was established.The analytical formula of PRB＇s horizontal stiffness was derived and the corresponding computational program was developed,the operating principle and mechanical properties of PRB was then studied.Through the time history analysis of isolated structures,the isolation capacity of PRBs was investigated.The results show that PRB is bearing with variable horizontal stiffness.It not only has horizontal isolation capacity as conventional RBs but also has favorable functions of horizontal displacement limitation（HDL）,and the higher the seismic intensity is,the better the HDL property is.

关 键 词：隔震支座 预应力 厚层橡胶 水平限位 隔震性能 

分 类 号：TU352.12[建筑科学—结构工程]