近场地震动下偏心结构的减震控制研究
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摘要
本文选用远场宽频地震Kanai-Tajimi模型与近场地震He-Agrawal速度脉冲模型,对现有的典型近场地震记录进行了非线性数值拟合。通过调整脉冲分量与宽频分量的比值,得到了不同脉冲分量的地震波,分析了在合成近场地震波作用下,设置粘滞阻尼器时偏心结构的动力反应,并与未设置阻尼器时结构的地震响应进行了对比,同时也对能反映结构偏心特性的参数进行了分析研究。通过数值模拟与仿真分析,得到了一些对实际工程设计有意义的结论。
In this paper,Kanai-Tajimi far-field broad-band model and He-Agrawal near-filed velocity pulse model are selected to conduct nonlinear numerical simulation of typical near-filed records,in which near-filed ground motions are obtained by adjusting the ratio of random broadband component and pulse component.Viscous dampers are considered to reduce the near-field effects,and the dynamic responses of eccentric structures with and without viscous dampers effects of near-filed ground motions are investigated systematically.The factors reflecting the characteristics of structural eccentricity are calculated too.Some significant conclusions can be obtained,which are helpful for designing eccentric building structures.
In this paper,Kanai-Tajimi far-field broad-band model and He-Agrawal near-filed velocity pulse model are selected to conduct nonlinear numerical simulation of typical near-filed records,in which near-filed ground motions are obtained by adjusting the ratio of random broadband component and pulse component.Viscous dampers are considered to reduce the near-field effects,and the dynamic responses of eccentric structures with and without viscous dampers effects of near-filed ground motions are investigated systematically.The factors reflecting the characteristics of structural eccentricity are calculated too.Some significant conclusions can be obtained,which are helpful for designing eccentric building structures.
引文
冯启民,邵广彪,2004.近断层地震动速度、位移峰值衰减规律的研究.地震工程与工程振动,24(4):13—19,24.
刘启方,袁一凡,金星,丁海平,2006.近断层地震动的基本特征.地震工程与工程振动,26(1):1—10.
李宏男,尹之潜,1988.偏心结构在多维地面运动作用下扭转耦联反映分析.地震工程与工程震动,8(4):45—53.
李新乐,朱晞,2004.近断层地震动等效速度脉冲研究.地震学报,26(6):634—643.
倪永军,朱晞,2004.近断层地震的加速度峰值比和反应谱分析.北方交通大学学报,28(4):1—5.
王耀伟,黄宗明,2004.影响单层偏心结构地震反应的参数分析.工程建设与设计,2(9):7—10.
魏琏,朱锦心,蒋自立,1980.多层建筑扭转弹塑性地震反应分析.土木工程学报,5(1):52—65.
徐培福,黄吉锋,韦承基,2000.高层建筑结构在地震作用下的扭转振动效应.建筑科学,(1):4—9.
周晓松,裴星洙,廖述清,2005.单层偏心结构平扭耦合地震反应分析.工程建设与设计,(3):56—60.
周云,2006.粘滞阻尼减震结构设计.武汉:武汉理工大学出版社.
Akik P.G.,Richards,1980.Quantitative Seismology.See:Theory and Methods,W.H.Freeman and Company.San Francisco,CA.
Bray J.D.,Rodriguez Marek,2004.Characterization of forward-directivity ground motions in the near-fault region.Soil Dynam Earthquake Eng.,24:815—828.
Hall J.F.,Heaton T.H.,Halling M.W.et al.,1995.Near-source ground motions and its effects on flexible buildings.Earthquake,Spectra,11(4):569—605.
Tan P.,Agrawal A.K.and Pan Y.,2005.Near-filed effects on seismically excited highway bridge equipped with nonlinear viscous dampers.Bridge Structures,1(3):307—318.
Yoshida O.,Dyke S.J.,Giacosa L.M.,Truman K.Z.,2003.Experimental Verification of Torsional Response Control of Asymmetric Buildings Using MR Dampers.Earthquake Engineering&Structural Dynamics,32:2085—2105.
刘启方,袁一凡,金星,丁海平,2006.近断层地震动的基本特征.地震工程与工程振动,26(1):1—10.
李宏男,尹之潜,1988.偏心结构在多维地面运动作用下扭转耦联反映分析.地震工程与工程震动,8(4):45—53.
李新乐,朱晞,2004.近断层地震动等效速度脉冲研究.地震学报,26(6):634—643.
倪永军,朱晞,2004.近断层地震的加速度峰值比和反应谱分析.北方交通大学学报,28(4):1—5.
王耀伟,黄宗明,2004.影响单层偏心结构地震反应的参数分析.工程建设与设计,2(9):7—10.
魏琏,朱锦心,蒋自立,1980.多层建筑扭转弹塑性地震反应分析.土木工程学报,5(1):52—65.
徐培福,黄吉锋,韦承基,2000.高层建筑结构在地震作用下的扭转振动效应.建筑科学,(1):4—9.
周晓松,裴星洙,廖述清,2005.单层偏心结构平扭耦合地震反应分析.工程建设与设计,(3):56—60.
周云,2006.粘滞阻尼减震结构设计.武汉:武汉理工大学出版社.
Akik P.G.,Richards,1980.Quantitative Seismology.See:Theory and Methods,W.H.Freeman and Company.San Francisco,CA.
Bray J.D.,Rodriguez Marek,2004.Characterization of forward-directivity ground motions in the near-fault region.Soil Dynam Earthquake Eng.,24:815—828.
Hall J.F.,Heaton T.H.,Halling M.W.et al.,1995.Near-source ground motions and its effects on flexible buildings.Earthquake,Spectra,11(4):569—605.
Tan P.,Agrawal A.K.and Pan Y.,2005.Near-filed effects on seismically excited highway bridge equipped with nonlinear viscous dampers.Bridge Structures,1(3):307—318.
Yoshida O.,Dyke S.J.,Giacosa L.M.,Truman K.Z.,2003.Experimental Verification of Torsional Response Control of Asymmetric Buildings Using MR Dampers.Earthquake Engineering&Structural Dynamics,32:2085—2105.
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