近断层脉冲型地震动重要参数的识别方法
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摘要
在拟合或合成近断层脉冲型地震动的研究中,速度等效脉冲中的参数需要依据实际地震动确定,因此,如何从地震动中识别这些参数就成为一个需要解决的问题。详细分析了已有脉冲周期和脉冲速度峰值的识别方法,分析结果表明这些方法均具有局限性,尤其是对于不规则地震动。提出了基于平滑后的地震动识别脉冲周期和脉冲速度峰值的方法,并验证了这种识别方法的有效性。结果表明:提出的脉冲周期和脉冲速度峰值识别方法可以克服以往方法的局限性,可以实现脉冲周期和脉冲速度峰值识别的程序化。
During the process of fitting or synthesizing near-fault ground motion,parameters in the equivalent velocity pulse need to be decided based on seismic records.Thus,it is a key problem on how to identify these parameters from seismic records.Pulse period and pulse peak velocity are important parameters in the equivalent velocity pulse models.In this study,various methods on identifying the parameters are reviewed.It is shown that all the existing methods have limitations,especially for the irregular seismic records.And a new method is proposed to identify the pulse period and the peak pulse velocity from the smoothed seismic records,and its validity is also verified.It's shown that the new method can overcome the limitations of the previous methods and can be used to identify the pulse period and the peak pulse velocity by program.
During the process of fitting or synthesizing near-fault ground motion,parameters in the equivalent velocity pulse need to be decided based on seismic records.Thus,it is a key problem on how to identify these parameters from seismic records.Pulse period and pulse peak velocity are important parameters in the equivalent velocity pulse models.In this study,various methods on identifying the parameters are reviewed.It is shown that all the existing methods have limitations,especially for the irregular seismic records.And a new method is proposed to identify the pulse period and the peak pulse velocity from the smoothed seismic records,and its validity is also verified.It's shown that the new method can overcome the limitations of the previous methods and can be used to identify the pulse period and the peak pulse velocity by program.
引文
[1]李爽,谢礼立.近场问题的研究现状与发展方向[J].地震学报,2007,29(1):102-111.
[2]杨迪雄,李刚,程耿东.近断层地震动作用下隔震结构的优化设计[J].世界地震工程,2006,22(1):1-8.
[3]刘启方.近断层强地震动预测的一些基本问题讨论[J].世界地震工程,2008,24(3):94-99.
[4]Alavi B,Krawinkler H.Consideration of near-fault ground motion effects in seismic design[C]//Proc12th World Conference on Earthquake En-gineering.Auckland,New Zealand.The New Zealand Society for Earthquake Engineering,2000.
[5]李新乐,朱晞.近断层地震动等效速度脉冲研究[J].地震学报,2004,26(6):634-643.
[6]韦韬.近断层速度脉冲对钢筋混凝土框架结构影响的研究[D].北京:中国地震局物理研究所,2005.
[7]王京哲.近场地震速度脉冲下的反应谱加速度敏感区[D].北京:北京交通大学,2004.
[8]白文婷.地震动的脉冲特性与结构破坏之间的关系研究初探[D].哈尔滨:中国地震局工程力学研究所,2005.
[9]PEER Strong Motion Database.http://peer.berkeley.edu/smcat/search.html.
[10]George P M,Apostolos S P.A mathematical representation of near-fault ground motions[J].Bull Seism.Soc.Am.2003,93(3):1099-1131.
[11]Menun C,Fu Qiang.An analytical model for near-fault ground motions and the response of SDOF systems[C]//Seventh US National Conference on Earthquake Engineering.Boston.Massachusetts.Mira Digital Publishing,2002.
[12]Nicos M.Rigidity-plasticity-viscosity:can electroheological dampers protect base-isolated structures from near-source ground motions[J].Earth-quake Engineering and Structural Dynamics,1997,26(5):571-591.
[13]He WL,Agrawal AK.Aclosed-formapproximation of near-fault ground motion[C]//Proceedings of2002ASCE Engineering Mechanics Confer-ence,New York.Columbia University,2002.
[14]田玉基,杨庆山,卢明奇.近断层脉冲型地震动的模拟方法[J].地震学报,2007,29(1):78-84.
[15]大崎顺彦著,吕敏申,谢礼立,译.地震动的谱分析入门[M].北京:地震出版社,1980.
[16]Jonathan D B,Adrian R M.Characterization of forward-directivity ground motions in the near-fault region[J].Soil Dynamics and Earthquake En-gineering,2004,24(11):815-828.
[17]http://course.jingpinke.com/gongxue/gongchengceshijishujichu/97-ppt/index.html
[2]杨迪雄,李刚,程耿东.近断层地震动作用下隔震结构的优化设计[J].世界地震工程,2006,22(1):1-8.
[3]刘启方.近断层强地震动预测的一些基本问题讨论[J].世界地震工程,2008,24(3):94-99.
[4]Alavi B,Krawinkler H.Consideration of near-fault ground motion effects in seismic design[C]//Proc12th World Conference on Earthquake En-gineering.Auckland,New Zealand.The New Zealand Society for Earthquake Engineering,2000.
[5]李新乐,朱晞.近断层地震动等效速度脉冲研究[J].地震学报,2004,26(6):634-643.
[6]韦韬.近断层速度脉冲对钢筋混凝土框架结构影响的研究[D].北京:中国地震局物理研究所,2005.
[7]王京哲.近场地震速度脉冲下的反应谱加速度敏感区[D].北京:北京交通大学,2004.
[8]白文婷.地震动的脉冲特性与结构破坏之间的关系研究初探[D].哈尔滨:中国地震局工程力学研究所,2005.
[9]PEER Strong Motion Database.http://peer.berkeley.edu/smcat/search.html.
[10]George P M,Apostolos S P.A mathematical representation of near-fault ground motions[J].Bull Seism.Soc.Am.2003,93(3):1099-1131.
[11]Menun C,Fu Qiang.An analytical model for near-fault ground motions and the response of SDOF systems[C]//Seventh US National Conference on Earthquake Engineering.Boston.Massachusetts.Mira Digital Publishing,2002.
[12]Nicos M.Rigidity-plasticity-viscosity:can electroheological dampers protect base-isolated structures from near-source ground motions[J].Earth-quake Engineering and Structural Dynamics,1997,26(5):571-591.
[13]He WL,Agrawal AK.Aclosed-formapproximation of near-fault ground motion[C]//Proceedings of2002ASCE Engineering Mechanics Confer-ence,New York.Columbia University,2002.
[14]田玉基,杨庆山,卢明奇.近断层脉冲型地震动的模拟方法[J].地震学报,2007,29(1):78-84.
[15]大崎顺彦著,吕敏申,谢礼立,译.地震动的谱分析入门[M].北京:地震出版社,1980.
[16]Jonathan D B,Adrian R M.Characterization of forward-directivity ground motions in the near-fault region[J].Soil Dynamics and Earthquake En-gineering,2004,24(11):815-828.
[17]http://course.jingpinke.com/gongxue/gongchengceshijishujichu/97-ppt/index.html
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