2008年汶川M_S8.0地震反应谱平台值衰减特性研究
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摘要
2008年汶川MS8.0地震获得了大量的强震动记录,为研究反应谱特征参数衰减特性提供了重要的基础资料.本文对已知场地条件的174个台站的记录进行研究,计算其加速度反应谱并按照最小二乘分段拟合方法进行标定,进而拟合了反应谱平台值的衰减关系;对比分析了水平方向与竖直方向反应谱平台值的衰减特性,提出用"平台值的场地衰减影响系数"来定量研究不同场地类型对反应谱平台值的影响,用"衰减曲线下降速率"来定量分析不同衰减曲线的衰减速率.通过计算得出水平向Ⅰ,Ⅱ,Ⅲ类场地的平台值场地衰减影响系数平均值分别为0.535 8,1和1.579,且Ⅲ类场地的加速度平台值衰减曲线的衰减速率最小.
After the 2008 Wenchuan MS8.0earthquake,a large volume of strong motion records were acquired,which provides important basic data for the study on attenuation characteristics of seismic response spectrum parameters.This paper calculates the acceleration response spectra of strong motion records from174 seismic stations with known site conditions.The spectra are calibrated via piecewise fitting with the least-squares method in order to fit the attenuation relationships of a response spectrum platform value.This paper also comparatively analyzes the attenuation characteristics of both vertical and horizontal response spectrum platform values so as to demonstrate how the quantitative study of site condition affects response spectrum platform values by means of the site attenuation influence coefficient of platform value.It also quantitatively analyzes the attenuation rates of different attenuation curves by means of their descending rates. The calculation results show that the site attenuation influence coefficients of horizontal platform value has an average value that is different for the three site types.The value for site typeⅠ is 0.535 8,typeⅡ is 1;and typeⅢ is 1.579,which is the minimum attenuation rate of the platform in all site types.
After the 2008 Wenchuan MS8.0earthquake,a large volume of strong motion records were acquired,which provides important basic data for the study on attenuation characteristics of seismic response spectrum parameters.This paper calculates the acceleration response spectra of strong motion records from174 seismic stations with known site conditions.The spectra are calibrated via piecewise fitting with the least-squares method in order to fit the attenuation relationships of a response spectrum platform value.This paper also comparatively analyzes the attenuation characteristics of both vertical and horizontal response spectrum platform values so as to demonstrate how the quantitative study of site condition affects response spectrum platform values by means of the site attenuation influence coefficient of platform value.It also quantitatively analyzes the attenuation rates of different attenuation curves by means of their descending rates. The calculation results show that the site attenuation influence coefficients of horizontal platform value has an average value that is different for the three site types.The value for site typeⅠ is 0.535 8,typeⅡ is 1;and typeⅢ is 1.579,which is the minimum attenuation rate of the platform in all site types.
引文
薄景山.1998.场地分类和设计反应谱调整方法研究[D].哈尔滨:中国地震局工程力学研究所博士后研究工作报告:5-14.
Bo J S.1998.Study on Methods of Site Classification and Seismic Design Response Spectra Adjusting[D].Harbin:Post-doctoral work record,Institute of Engineering Mechanics,China Earthquake Administration:5-14(in Chinese).
薄景山,李秀领,李山有.2003.场地条件对地震动影响研究的若干进展[J].世界地震工程,19(2):11-15.
Bo J S,Li X L,Li S Y.2003.Some progress of study on the effect of site conditions on ground motion[J].World Earthquake Engineering,19(2):11-15(in Chinese).
郭晓云.2011.汶川地震反应谱研究[D].哈尔滨:中国地震局工程力学研究所:1.
Guo X Y.2011.Study on Response Spectrum of Wenchuan Earthquake[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration:1(in Chinese).
郭晓云,薄景山,张宇东,孙有为,李平.2011.抗震设计反应谱的标定方法[J].世界地震工程,27(1):66-71.
Guo X Y,Bo J S,Zhang Y D,Sun Y W,Li P.2011.Methods of calibrating seismic design response spectrum[J].World Earthquake Engineering,27(1):66-71(in Chinese).
廖振鹏,李大华.1989.地震小区划:理论与实践[M].北京:地震出版社:44-74.
Liao Z P,Li D H.1989.Seismic Micro-Zoning:Theory and Practice[M].Beijing:Seismological Press:44-74(in Chinese).
廖振鹏,郑天愉.1997.工程地震学在中国的发展[J].地球物理学报,40(增刊):177-191.
Liao Z P,Zheng T Y.1997.Development of engineering seismology in China[J].Chinese Journal of Geophysics,40(Suppl.):177-191(in Chinese).
刘红帅.2009.基于小生境遗传算法的设计地震动反应谱标定方法[J].岩土工程学报,31(6):975-979.
Liu H S.2009.Calibrating method for seismic response spectra based on niche genetic algorithm[J].Chinese Journal of Geotechnical Engineering,31(6):975-979(in Chinese).
刘文锋,付兴潘,于振兴,陈学中,张辛.2009.反应谱特征周期的统计分析[J].青岛理工大学学报,30(5):1-7.
Liu W F,Fu X P,Yu Z X,Chen X Z,Zhang X.2009.Empirical statistical analysis of characteristic period of acceleration response spectrum[J].Journal of Qingdao Technological University,30(5):1-7(in Chinese).
卢寿德,李小军.2008.汶川8.0级地震未校正加速度记录[M].北京:地震出版社:7-15.
Lu S D,Li X J.2008.Original Acceleration Records of Wenchuan MS8.0 Earthquake[M].Beijing:SeismologicalPress:7-15(in Chinese).
万卫.2013.汶川地震反应谱衰减关系研究[D].哈尔滨:中国地震局工程力学研究所:19.
Wan W.2013.Study on Relationship of Response Spectrum Attenuation of Wenchuan Earthquake[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration:19(in Chinese).
夏江,陈清军.2006.基于遗传算法的设计地震反应谱标定方法[J].力学季刊,27(2):317-323.
Xia J,Chen Q J.2006.Calibrating method of seismic response spectrum based on genetic algorithm[J].Chinese Quarterly of Mechanics,27(2):317-323(in Chinese).
喻烟.2012.汶川地震区地震动估计经验模型[D].哈尔滨:中国地震局工程力学研究所:5.
Yu Y.2012.Empirical Estimate Model for Ground Motion of Wenchuan Earthquake Zone[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration:5(in Chinese).
袁一凡,田启文.2012.工程地震学[M].北京:地震出版社:91-92.
Yuan Y F,Tian Q W.2012.EngineeringSeismology[M].Beijing:Seismological Press:91-92(in Chinese).
Li X J,Zhou Z H,Yu H Y,Wen R Z,Lu D W,Huang M,Zhou Y N,Cu J W.2008.Strong motion observations andrecordings from the great Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,7(3):235-246.
Li X J,Liu L,Wang Y S,Yu T.2010.Analysis of horizontal strong-motion attenuation in the great 2008 Wenchuanearthquake[J].Bull Seismol Soc Am,100(5B):2440-2449.
Bo J S.1998.Study on Methods of Site Classification and Seismic Design Response Spectra Adjusting[D].Harbin:Post-doctoral work record,Institute of Engineering Mechanics,China Earthquake Administration:5-14(in Chinese).
薄景山,李秀领,李山有.2003.场地条件对地震动影响研究的若干进展[J].世界地震工程,19(2):11-15.
Bo J S,Li X L,Li S Y.2003.Some progress of study on the effect of site conditions on ground motion[J].World Earthquake Engineering,19(2):11-15(in Chinese).
郭晓云.2011.汶川地震反应谱研究[D].哈尔滨:中国地震局工程力学研究所:1.
Guo X Y.2011.Study on Response Spectrum of Wenchuan Earthquake[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration:1(in Chinese).
郭晓云,薄景山,张宇东,孙有为,李平.2011.抗震设计反应谱的标定方法[J].世界地震工程,27(1):66-71.
Guo X Y,Bo J S,Zhang Y D,Sun Y W,Li P.2011.Methods of calibrating seismic design response spectrum[J].World Earthquake Engineering,27(1):66-71(in Chinese).
廖振鹏,李大华.1989.地震小区划:理论与实践[M].北京:地震出版社:44-74.
Liao Z P,Li D H.1989.Seismic Micro-Zoning:Theory and Practice[M].Beijing:Seismological Press:44-74(in Chinese).
廖振鹏,郑天愉.1997.工程地震学在中国的发展[J].地球物理学报,40(增刊):177-191.
Liao Z P,Zheng T Y.1997.Development of engineering seismology in China[J].Chinese Journal of Geophysics,40(Suppl.):177-191(in Chinese).
刘红帅.2009.基于小生境遗传算法的设计地震动反应谱标定方法[J].岩土工程学报,31(6):975-979.
Liu H S.2009.Calibrating method for seismic response spectra based on niche genetic algorithm[J].Chinese Journal of Geotechnical Engineering,31(6):975-979(in Chinese).
刘文锋,付兴潘,于振兴,陈学中,张辛.2009.反应谱特征周期的统计分析[J].青岛理工大学学报,30(5):1-7.
Liu W F,Fu X P,Yu Z X,Chen X Z,Zhang X.2009.Empirical statistical analysis of characteristic period of acceleration response spectrum[J].Journal of Qingdao Technological University,30(5):1-7(in Chinese).
卢寿德,李小军.2008.汶川8.0级地震未校正加速度记录[M].北京:地震出版社:7-15.
Lu S D,Li X J.2008.Original Acceleration Records of Wenchuan MS8.0 Earthquake[M].Beijing:SeismologicalPress:7-15(in Chinese).
万卫.2013.汶川地震反应谱衰减关系研究[D].哈尔滨:中国地震局工程力学研究所:19.
Wan W.2013.Study on Relationship of Response Spectrum Attenuation of Wenchuan Earthquake[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration:19(in Chinese).
夏江,陈清军.2006.基于遗传算法的设计地震反应谱标定方法[J].力学季刊,27(2):317-323.
Xia J,Chen Q J.2006.Calibrating method of seismic response spectrum based on genetic algorithm[J].Chinese Quarterly of Mechanics,27(2):317-323(in Chinese).
喻烟.2012.汶川地震区地震动估计经验模型[D].哈尔滨:中国地震局工程力学研究所:5.
Yu Y.2012.Empirical Estimate Model for Ground Motion of Wenchuan Earthquake Zone[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration:5(in Chinese).
袁一凡,田启文.2012.工程地震学[M].北京:地震出版社:91-92.
Yuan Y F,Tian Q W.2012.EngineeringSeismology[M].Beijing:Seismological Press:91-92(in Chinese).
Li X J,Zhou Z H,Yu H Y,Wen R Z,Lu D W,Huang M,Zhou Y N,Cu J W.2008.Strong motion observations andrecordings from the great Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,7(3):235-246.
Li X J,Liu L,Wang Y S,Yu T.2010.Analysis of horizontal strong-motion attenuation in the great 2008 Wenchuanearthquake[J].Bull Seismol Soc Am,100(5B):2440-2449.
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