弹性滑板支座不同摩擦系数对楼层反应谱的影响  

Effect of Different Friction Coefficients of Elastic Slide Bearings on Floor Response Spectra

作　　者：戴纳新 王东梅 谭平[2] 周福霖[2,3] 申梦岭 DAI Naxin;WANG Dongmei;TAN Ping;ZHOU Fulin;SHEN Mengling(School of Civil Engineering,University of South China,Hengyang 421001,China;Guangdong Key Laboratory of Earthquake Engineering&Applied Technique(Guangzhou University),Guangzhou 510405,China;College of Civil Engineering,Hunan University,Changsha 410082,China;Nuclear Industry Engineering Research&Design Co.,Ltd.,Beijing 101300,China)

机构地区：[1]南华大学土木工程学院,湖南衡阳421001 [2]广东省广州市地震工程与应用技术重点实验室(广州大学),广东广州510405 [3]湖南大学土木工程学院,湖南长沙410082 [4]核工业工程研究设计有限公司,北京101300

出　　处：《湖南大学学报（自然科学版）》2024年第7期137-147,共11页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51468010,52378293)。

摘　　要：采用课题组建立的楼层反应谱Benchmark模型,研究弹性滑板支座不同摩擦系数对楼层反应谱的影响.使用ETABS软件建立隔震结构有限元模型,在底层柱底和基础之间布置弹性滑板支座,为了使楼层反应谱具有实用性和代表性,输入FEMA P695中推荐的22条远场地震动,分别对4个摩擦系数的基础隔震结构进行非线性时程分析,研究弹性滑板支座摩擦系数对楼层反应谱的影响,且与铅芯橡胶支座隔震结构楼层反应谱进行比较.结果表明:摩擦系数影响楼层反应谱的谱值,但不改变楼层反应谱峰值出现的周期,不影响楼层反应谱的频谱特征;在周期0~6 s内,文中4种摩擦系数的弹性滑板支座结构的楼层反应谱谱值均小于铅芯橡胶支座的谱值,说明该结构弹性滑板支座的隔震性能优于铅芯橡胶支座.The Benchmark model of the floor response spectrum established by our study group was used to study the effect of different friction coefficients of the elastic slide bearing on the floor response spectrum.ETABS software was used to establish the finite element model of the seismic isolation structure,and the elastic slide bearing was arranged between the bottom of the ground floor column and the foundation.To make the floor response spectrum practical and representative,the 22 far-field vibrations recommended in ATC-63 were inputted to carry out the nonlinear time-distance analysis for the four friction coefficients of the base seismic isolation structure,respectively,and to study the effect of the friction coefficients of the elastic slide bearing on the floor response spectrum,which was compared with that of the friction coefficient of lead core rubber bearing seismic isolation.The results show that the friction coefficient affects the spectral value of the floor response spectrum but does not change the period of the peak value of the floor response spectrum and does not affect the spectral characteristics of the floor response spectrum;in the period of 0~6 s,the spectral value of the floor response spectrum of the four friction coefficients of elastic slide bearing structure in the paper is less than that of the lead core rubber bearing,which indicates that the seismic isolation performance of this structure of elastic slide bearing is better than that of the lead core rubber bearing.

关 键 词：摩擦系数 弹性滑板支座 地震动 楼层反应谱 有限元分析 

分 类 号：TU352.1[建筑科学—结构工程]