近场地震动对基础隔震结构的影响
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摘要
选用宽频远场地震Kanai-Tajimi模型与He-Agrawal近场脉冲地震速度脉冲模型,对现有的典型近场地震记录进行非线性数值拟合,调整其脉冲分量与宽频分量的比值,得到不同脉冲分量的地震波;文中以一幢8层基础隔震结构为研究对象,分析了合成近场地震波下基础隔震结构的水平及转动动力响应,结果表明含有脉冲分量的近场地震动比远场地震动破坏力更大;基础隔震体系能有效地减小上部结构在近场地震动中的响应。
In this paper,Kanai-Tajimi model and He-Agrawal velocity pulse model are selected to conduct the nonlinear numerical simula- tion of several typical near-filed records,and many near-field ground motions are obtained by adjusting the ratio of random broadband com- ponent and pulse component. In this study,a typical structure of eight floors is used as an object,then analyzing the dynamic responses of the isolated structure. Results show that the destructivity is more serious in near-field ground motion than that of far-field ground motion; and the base isolation system can reduce the seismic responses of the superstructure effectively.
In this paper,Kanai-Tajimi model and He-Agrawal velocity pulse model are selected to conduct the nonlinear numerical simula- tion of several typical near-filed records,and many near-field ground motions are obtained by adjusting the ratio of random broadband com- ponent and pulse component. In this study,a typical structure of eight floors is used as an object,then analyzing the dynamic responses of the isolated structure. Results show that the destructivity is more serious in near-field ground motion than that of far-field ground motion; and the base isolation system can reduce the seismic responses of the superstructure effectively.
引文
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[7]李新乐,朱晞.近断层地震动等效速度脉冲研究[J].地震学报,2004(6)
[8]周福霖.工程结构减震控制[M].北京:地震出版社,1997
[9]R.I.Skinner,W.H.Robinson,G.H.Mcverry.谢礼立译.工程隔震概论[M].北京:地震出版社,1996
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[11]J.M.Kelly.Base isolation in Japan[R].1988,Report No.UCB/EERC-88-20,EERC University of California,Berke-ley,December,1988
[12]Narasimhan,S.,Nagarajaiah,S.,Johnson,E.A.,and Gavin,H.P.Benchmark problem for control of base isolated buildings.CD-ROM Proc.3rd World Conf.on Struct.Contr.,Como,Italy
[13]P.TAN,A.K.AGRAWAL and Y.PAN.Near-filed effects on seismically excited highway bridge equipped with non-linear viscous dampers.Bridge structures.2005(1)
[2]Bray JD,Rodriguez Marek.Characterization of forward-directivity ground motions in the near-fault region[J].Soil Dynam Earthquake Eng,2004(24)
[3]Hall JF,Heaton TH,Halling MW,et al.Near-source ground motions and its effects on flexible buildings[J].Earthquake,Spectra,1995,11(4)
[4]刘启方,袁一凡,金星,丁海平.近断层地震动的基本特征[J].地震工程与工程振动,2006(2)
[5]倪永军,朱晞.近断层地震的加速度峰值比和反应谱分析[J].北方交通大学学报,2004
[6]冯启民,邵广彪.近断层地震动速度、位移峰值衰减规律的研究[J].地震工程与工程振动,2004(4)
[7]李新乐,朱晞.近断层地震动等效速度脉冲研究[J].地震学报,2004(6)
[8]周福霖.工程结构减震控制[M].北京:地震出版社,1997
[9]R.I.Skinner,W.H.Robinson,G.H.Mcverry.谢礼立译.工程隔震概论[M].北京:地震出版社,1996
[10]徐忠根,周福霖.我国首栋橡胶垫隔震住宅楼动力分析[J].世界地震工程,1996(1)
[11]J.M.Kelly.Base isolation in Japan[R].1988,Report No.UCB/EERC-88-20,EERC University of California,Berke-ley,December,1988
[12]Narasimhan,S.,Nagarajaiah,S.,Johnson,E.A.,and Gavin,H.P.Benchmark problem for control of base isolated buildings.CD-ROM Proc.3rd World Conf.on Struct.Contr.,Como,Italy
[13]P.TAN,A.K.AGRAWAL and Y.PAN.Near-filed effects on seismically excited highway bridge equipped with non-linear viscous dampers.Bridge structures.2005(1)
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