大底盘多塔高层隔震结构的地震响应
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摘要
采用弹性时程分析方法,结合某大底盘多塔隔震结构(建成后将成为目前大陆地区最高的隔震建筑),分析结构在多遇及罕遇地震作用下的响应。对比层间剪力,计算水平向折减系数,绘制结构层间位移的变化曲线,并探讨高层复杂结构应用隔震技术的相关要求。结果表明,隔震结构的地震作用显著降低,层间剪力远小于抗震结构的,罕遇地震作用下的水平向折减系数更小;层间位移主要集中在隔震层,上部结构的层间位移几乎为零,结构呈现出明显的整体平动趋势。
The earthquake response analysis of one multi-tower isolated structure with an enlarged base is carried out using elastic time history analysis method(It will be the tallest isolated building in the mainland after be built).Story shear force was compared and horizontal reduction coefficient was calculated.Variation of story displacement was plotted into curves and application of seismic isolation in high-rise buildings was also discussed.The results show that seismic response decreases obviously and story shear force is far less than that of aseismic structures.Horizontal reduction coefficient is lower under rare earthquake.Story displacement is centralized at isolation layer,while it approaches zero on superstructure.The isolated structure shows whole translational motion.
The earthquake response analysis of one multi-tower isolated structure with an enlarged base is carried out using elastic time history analysis method(It will be the tallest isolated building in the mainland after be built).Story shear force was compared and horizontal reduction coefficient was calculated.Variation of story displacement was plotted into curves and application of seismic isolation in high-rise buildings was also discussed.The results show that seismic response decreases obviously and story shear force is far less than that of aseismic structures.Horizontal reduction coefficient is lower under rare earthquake.Story displacement is centralized at isolation layer,while it approaches zero on superstructure.The isolated structure shows whole translational motion.
引文
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[2]金光辉,张凌云.隔震设计在高层建筑中的应用[J.]建筑科学,2004,20(4):19-21(Jin Guanghui,ZhangLingyun.Use of isolation design for high-rise buildings[J].BuildingScience,2004,20(4):19-21(in Chinese))
[3]Prayag J,Sayani A,Keri L,et al.Evaluation of approachesto characterize seismic isolation systems for design[J.]Journal of Earthquake Engineering,2009,13(6):835-851
[4]GB 50011—2008建筑抗震设计规范[S.]北京:中国建筑工业出版社,2008(GB 50011—2008 Code for seismicdesign ofbuildings[S.]Beijing:China Architecture&BuildingPress,2008(in Chinese))
[5]魏德敏.高层隔震建筑的三维地震响应[J.]世界地震工程,2002,18(1):116-118(Wei Demin.The 3-dimensionseismic response of base-isolated high rise building[J.]World Earthquake Engineering,2002,18(1):116-118(inChinese))
[6]苏键,温留汉.黑沙,周福霖.高层隔震建筑性能分析[J.]建筑结构,2009,39(11):40-42(Su Jian,Wenliuhan.Heisha,Zhou Fulin.Study on dynamic characteristics ofbase isolated high-rise building[J.]Building Structure,2009,39(11):40-42(in Chinese))
[7]KangBS,Li L,Ku TW.Dynamic response characteristics ofseismic isolation systems for building structures[J.]Journalof Mechanical Science and Technology,2009,123(8):2179-2192
[8]叶昆,李黎.大底盘多塔楼结构基础隔震设计分析[J.]工程抗震,2001(3):22-26(Ye Kun,Li li,Baseisolation design analysis for muti-tower in one podium[J.]Earthquake Resistant Engineering,2001(3):22-26(inChinese))
[9]周福霖.工程结构减震控制[M.]北京:地震出版社,1997
[10]徐忠根,胡敏茵,周福霖.房屋建筑中间层隔震研究[J.]工程抗震与加固改造,2004(5):23-28(Xu Zhonggen,Hu Minyin,Zhou Fulin.Discussion on mid-story isolationof building[J.]Earthquake Resistant Engineering andRetrofitting,2004(5):23-28(in Chinese))
[11]刘伟庆,王曙光,林勇.宿迁市人防指挥大楼隔震设计方法研究[J.]建筑结构学报,2005,26(2):81-86(LiuWeiqing,Wang shuguang,Lin Yong.Research on the designmethod of base-isolated structure of Suqian Renfang ZhihuiBuilding[J.]Journal of Building Structures,2005,26(2):81-86(in Chinese))
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