不同抗拉刚度支座隔震体系的地震响应分析

详细信息   下载全文 | 推荐本文 |

英文篇名：Seismic response analysis of isolation bearing system with different tensile stiffnesses 作者：叶烈伟 ; 韩淼 ; 曾德民 英文作者：YE Liewei ; HAN Miao ; ZENG Demin ; School of Civil Engineering & Traffic Engineering ; Beijing University of Civil Engineering & Architecture ; China Institute of Building Standard Design & Research 关键词：高层建筑 ; 动力时程 ; 隔震支座 ; 提离模型 英文关键词：highrise building ; dynamic time-history ; isolator bearing ; lift-off model 刊名：世界地震工程 英文刊名：World Earthquake Engineering 出版日期：2016-12-15 出版单位：世界地震工程 机构：北京建筑大学土木与交通工程学院;中国建筑标准设计研究院; 年：2016 期：04 基金：国家自然科学基金面上项目(51378047) ; 基金：十二五国家科技支撑项目(2011BAJ08B03) CN：23-1195/P ISSN：1007-6069 页：33-39 页数：7 分类号：TU352.12 语种：中文; 文件大小：2204K

摘要

采用大型通用软件Abaqus对某拟建高层建筑进行了隔震动力时程分析,隔震支座分别采用拉压等刚度(等刚度模型),拉压不等刚度(不等刚度模型)和释放抗拉刚度(提离模型)3种支座模型,对比了3种支座模型下隔震结构体系的弹性和弹塑性时程响应,包括层间位移角、基底剪力、隔震层位移、支座拉力和支座竖向位移。结果表明:(1)假定上部结构为弹性的隔震体系响应与相应弹塑性体系的响应存在一定的差异,建议罕遇地震分析采用弹塑性模型;(2)支座等刚度模型与不等刚度模型的支座拉力,弹性分析时明显大于规范限值,弹塑性分析时减小,但仍大于规范限值;(3)提离模型能避免支座受拉,而对上部结构弹塑性响应影响较小,对隔震层水平响应基本无影响。
        A large-scale general-purpose finite element analysis software ABAQUS was used to make isolation dynamic time-history analysis of a intended to be constnucted high-rise building with three different rubber-bearings model,including pulling stiffness equal to pushing stiffness( equal stiffness model),pulling stiffness different to pushing stiffness( varying stiffness model) and releasing pulling stiffness( lift-off model),then elastic and elasticplastic time-history analysis results of three rubber-bearings models,including story drift angle,base shear,displacement of isolation layer,bearing tension and bearing vertical displacement were compared. The results show that:( 1) Tere are certain differences of isolated system's response between elastic and elastoplastic superstructures,so it is suggested that elastoplastic model is adopted for seldom occured earthquake analysis;( 2) The bearing tension of equal stiffness model and vary stiffness model obviously exceed the limits of code in elastic time-history,and it decreases in elastic-plastic time-history,however still exceeds the limits of code;( 3) Lift-off model can effectively avoid bearing tension,less affect the elastic-plastic response of superstructure and have no effect on horizontal response of islation layer.

引文

[1]苏经宇,曾德民,田杰.隔震建筑概论[M].北京,冶金工业出版社,2012.SUN Jingyu,ZENG Demin,TIAN Jie.Introduction of isolated building[M].Beijing:Metallurgical Industry Press,2012.
    [2]吴任鹏,王曙光,杜东升,等.考虑橡胶支座拉压刚度不同取值时对隔震效果的影响研究[J].工程抗震与加固改造,2008,30(5):24-28.WU Renpeng,WANG Shuguang,DU Dongsheng,et al.Research on influence of different between pulling and pushing stiffness of RB&LRB upon the isolation effectiveness[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):24-28.
    [3]苏键,温留汉,黑沙,等.隔震层竖向刚度对高层基础隔震结构的影响[J].地震工程与工程振动,2010,30(3):166-170.SU Jian,WEN Liuhan,HEI Sha,et al.Effects of vertical stiffness of isolation layer on high-rise base isolated buildings[J].Earthquake Resistant Engineering and Retrofitting,2010,30(3):166-170.
    [4]程华群,刘伟庆,王曙光.高层隔震建筑设计中隔震支座受拉问题分析[J].地震工程与工程振动,2007,27(4):161-166.CHENG Huaquan,LIU Weiqing,WANG Shuguang.Analysis of the tension of rubber bearings in the design of isolated high-rise bulildings[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(4):161-166.
    [5]GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011-2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2010.