不同层隔震结构在近断层地震作用下动力响应分析

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英文篇名：Dynamic response analysis for multi-story structures with different isolation stories under near-fault ground motions 作者：韩淼 ; 张文会 ; 朱爱东 ; 孙一林 ; 李进波 英文作者：HAN Miao ; ZHANG Wen-hui ; ZHU Ai-dong ; SUN Yi-lin ; LI Jin-bo ; School of Civil and Transportation Engineering ; Beijing University of Civil Engineering and Architecture 关键词：近断层地震动 ; 隔震结构 ; 橡胶支座 ; 动力响应 英文关键词：near-fault ground motion ; isolation structure ; rubber bearing ; dynamic response 刊名：振动与冲击 英文刊名：Journal of Vibration and Shock 出版日期：2016-03-15 出版单位：振动与冲击 机构：北京建筑大学土木与交通工程学院; 年：2016 期：05 基金：国家自然科学基金面上项目(51378047) CN：31-1316/TU ISSN：1000-3835 页：134-138 页数：5 分类号：TU352.12 语种：中文; 文件大小：345K

摘要

选用天然橡胶支座(LNR)与铅芯橡胶支座(LRB)作为两栋8层钢筋混凝土结构的隔震装置,对其分别输入172条近断层地震波,计算隔震层设置在基础或以上每一层时隔震结构的动力响应,分析近断层地震动对不同层隔震结构动力响应的影响。分析结果表明:隔震结构输入能量小于非隔震结构输入能量,LRB隔震结构的输入能量小于LNR隔震结构的输入能量;随着隔震层的上移,隔震支座位移减小,顶层最大加速度增大。近断层地震动特征参数与不同层隔震结构动力响应参数均存在相关性,但相关程度不同。隔震结构设计要根据建筑结构动力响应的需求,同时考虑隔震层位置与地震动特征参数的影响。
        The dynamic responses of two 8-story RC frame structures with isolators under near-fault ground motions were studied when the isolation layer was set on the base or each story. The natural rubber bearings( NRB) or lead-rubber bearings( LRB) were taken as isolators. 172 near-fault seismic wave records were input in structures,respectively. The effects of near-fault ground motions on multi-story structures with different isolation stories were analyzed. The results showed that the input energy of an isolation structure is less than that of a non-isolation structure; the input energy of a LRB isolation structure is less than that of a NRB isolation structure; the displacement of isolation bearing decreases and the maximum acceleration of the top-story increases with lifting the isolation layer; the characteristic parameters of near-fault ground motions are all correlated with the dynamic response parameters of isolation structures,but the levels of correlation are different; the isolated structures need to be designed in terms of the requirements for structure dynamic responses,meanwhile the position of isolation layer and the influence of seismic characteristic parameters should be considered.

引文

[1]刘启方,袁一凡,金星,等.近断层地震动的基本特征[J].地震工程与工程振动,2006,26(1):1-10.LIU Qi-fang,YUAN Yi-fan,JIN Xing,et al.Basic characteristics of near-fault ground motion[J].Earthquake Engineering and Engineering Vibration,2006,26(1):1-10.
    [2]王海云,谢礼立.近断层强地震动的特点[J].哈尔滨工业大学学报,2006,38(12):2070-2076.WANG Hai-yun,XIE Li-li.Characteristics of near-fault strong ground motions[J].Journal of Harbin Institute Technology,2006,38(12):2070-2076.
    [3]火明譞,赵亚敏,陆鸣.近断层地震作用隔震结构研究现状综述[J].世界地震工程,2012,28(3):161-170.HUO Ming-xuan,ZHAO Ya-min,LU Ming.Research progress in base-isolated structures subjected to near-fault ground motions[J].World Earthquake Engineering,2012,28(3):161-170.
    [4]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.
    [5]Yang J N,Agrawal A K.Serniactive hybrid control systems for nonlinear buildings against near-field earthquakes[J].Engineering Structures,2002,24(3):271-280.
    [6]Mazza F,Vulcano A.Effects of near fault ground motions on the nonlinear dynamic response of base isolated RC framed buildings[J].Earthquake Engineering and Structural Dynamics,2012,41(1):211-232.
    [7]周云,乐登,邓雪松.设计用地震动总输入能量谱研究[J].工程抗震与加固改造,2008,30(5):1-7.ZHOU Yun,YUE Deng,DENG Xue-song.Research on input energy spectra for design of earthquake strong motion[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):1-7.
    [8]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
    [9]王璐.SPSS统计分析基础、应用与实践[M].北京:化学工业出版社,2009.