土层非线性地震反应分析方法及其检验  

Development and verification of a method for analyzing the nonlinear seismic response of soil layers

作　　者：齐文浩[1,2] 王振清[1] 薄景山[2,3] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080 [3]防灾科技学院地震科学系,河北三河065201

出　　处：《哈尔滨工程大学学报》2010年第4期444-450,共7页Journal of Harbin Engineering University

基　　金：中国地震局工程力学研究所基本科研业务费专项资助项目(2008B008);国家自然科学基金资助项目(50808164);地震行业科研专项(200708039)

摘　　要：针对现行土层地震反应方法在大震情况不适用的问题,基于所提出的指数形式土体动力本构模型(UE模型),结合时空交叠积分格式和多次透射边界条件,提出了一种新的一维土层非线性地震反应分析方法.利用共振柱试验的结果检验了UE模型的可靠性,并利用该方法对唐山响嘡三维强震台阵的资料进行了计算,通过对地表加速度时程和放大系数以及土层阻尼特性的计算结果进行分析,可知该方法较等效线性化方法更为合理可靠.检验结果表明该方法能够较好地反应土体在强震作用下的非线性特性,可用于土层地震反应分析计算.The current method used to analyze the seismic response of soil layers is inappropriate for forces in strong earthquakes.A one-dimensional method for seismic response analysis of nonlinear soil layers was proposed.It is a constitutive model of soil dynamics with an exponential form,combining a time-space overlapping integration scheme and the multi-transmitting artificial boundary condition.This emerged from a UE model,and its reliability was verified by the results of resonant column tests.The new method was used with the strong motions recorded by the Xiangtang three-dimensional strong motion array in Tangshan.By analyzing the results of time histories and amplification factors for ground acceleration and the results of damping characteristic of soil layers,the conclusion can be drawn that the new method is more reasonable and reliable than the equivalent linearization method.The test results indicated that the method can simulate the nonlinear characteristics of soil layers experiencing heavy thrusts,and it can be applied to the analysis of seismic response in soil layers.

关 键 词：土层 非线性地震反应 分析方法 土体动力本构模型 强震台阵 检验 

分 类 号：TU435[建筑科学—岩土工程]