下辽河地区典型土层地震反应时域和频域方法对比
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摘要
为了解决一维频域等效线性化方法在计算下辽河地区深覆盖场地地震反应时不够准确这一问题,本文采用一维时域非线性计算程序DEEPSOIL对该地区典型土层地震反应进行计算,并将结果进行对比分析。研究结果表明,在大震情况下,时域非线性方法有效地避免了等效线性化方法加速度峰值不合理和特征周期值偏高的现象。用时域非线性方法计算该类型场地大震情况,结果更加合理。
In order to solve the problem that one-dimensional frequency-domain equivalent linear method is not accurate enough for calculating the seismic responses of the deep sites in Liaohe River plain,we use one-dimensional time-domain nonlinear procedure DEEPSOIL to calculate the seismic responses of typical sites and compare the results.The results shows that the time-domain nonlinear method can get more accurate PGA and Tg values for deep sites when the input ground motions are strong.The results of the time-domain nonlinear method are more reasonable in this case.
In order to solve the problem that one-dimensional frequency-domain equivalent linear method is not accurate enough for calculating the seismic responses of the deep sites in Liaohe River plain,we use one-dimensional time-domain nonlinear procedure DEEPSOIL to calculate the seismic responses of typical sites and compare the results.The results shows that the time-domain nonlinear method can get more accurate PGA and Tg values for deep sites when the input ground motions are strong.The results of the time-domain nonlinear method are more reasonable in this case.
引文
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[5]陈学良,金星,陶夏新,等.土体动力一维非线性本构关系剖析与评价[J].地震工程与工程振动,2006,26(6):147-157.CHEN Xueliang,JIN Xing,TAO Xiaxin,et al.Analysis and evaluation of one dimensional dynamic nonlinear constitutive relation of soil[J].Jour-nal of Earthquake Engineering and Engineering Vibration,2006,26(6):147-157.(in Chinese)
[6]齐文浩,王振清,薄景山.土层非线性地震反应分析方法及其检验[J].哈尔滨工程大学学报,2010,31(4):444-450.QI Wenhao,WANG Zhenqing,BO Jingshan.Development and verification of a method for analyzing the nonlinear seismic response of soil layers[J].Journal of Harbin Engineering University,2010,31(4):444-450.(in Chinese)
[7]栾茂田,林皋.场地地震反应一维非线性计算模型[J].工程力学,1992,9(1):94-103.LUAN Maotian,LIN Gao.Site seismic response one-dimensional nonlinear calculation model[J].Engineering Mechanics,1992,9(1):94-103.(in Chinese)
[8]Hashash Y M A,Park D.Non-linear one-dimensional seismic ground motion propagation in the Mississippi embayment[J].Engineering Geology,2001,62(1-3):185-206.
[9]Park D,Hashash Y M A.Soil damping formulation in nonlinear time domain site response analysis[J].Journal of Earthquake Engineering,2004,8(2):249-274.
[2]廖振鹏,李小军.地震小区划—理论与实践[M].北京:地震出版社,1989:250-265.
[3]齐文浩,薄景山.土层地震反应等效线性化方法综述[J].世界地震工程,2007,23(4):221-226.QI Wenhao,BO Jingshan.Summarization on equivalent linear method of seismic responses for soil layers[J].World Earthquake Engineering,2007,23(4):221-226.(in Chinese)
[4]陈学良.土体动力特性、复杂场地非线性地震反应及其方法研究[D].哈尔滨:中国地震局工程力学研究所,2006.
[5]陈学良,金星,陶夏新,等.土体动力一维非线性本构关系剖析与评价[J].地震工程与工程振动,2006,26(6):147-157.CHEN Xueliang,JIN Xing,TAO Xiaxin,et al.Analysis and evaluation of one dimensional dynamic nonlinear constitutive relation of soil[J].Jour-nal of Earthquake Engineering and Engineering Vibration,2006,26(6):147-157.(in Chinese)
[6]齐文浩,王振清,薄景山.土层非线性地震反应分析方法及其检验[J].哈尔滨工程大学学报,2010,31(4):444-450.QI Wenhao,WANG Zhenqing,BO Jingshan.Development and verification of a method for analyzing the nonlinear seismic response of soil layers[J].Journal of Harbin Engineering University,2010,31(4):444-450.(in Chinese)
[7]栾茂田,林皋.场地地震反应一维非线性计算模型[J].工程力学,1992,9(1):94-103.LUAN Maotian,LIN Gao.Site seismic response one-dimensional nonlinear calculation model[J].Engineering Mechanics,1992,9(1):94-103.(in Chinese)
[8]Hashash Y M A,Park D.Non-linear one-dimensional seismic ground motion propagation in the Mississippi embayment[J].Engineering Geology,2001,62(1-3):185-206.
[9]Park D,Hashash Y M A.Soil damping formulation in nonlinear time domain site response analysis[J].Journal of Earthquake Engineering,2004,8(2):249-274.
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