龙头山集镇局部场地地震动效应分析  

Analysis of the local site effect in Longtoushan town

作　　者：陈珍 周游 郝冰 李远东 周正华 沈欣茹 魏鑫 Chen Zhen;Zhou You;Hao Bing;Li Yuandong;Zhou Zhenghua;Shen Xinru;Wei Xin(Collage of Transportation Engineering,Nanjing Tech University,Jiangsu Nanjing 210009,China;Cores and Samples Center of Natural Resources,China Geological Survey,Hebei Sanhe 065201,China;First Affiliated Hospital,Heilongjiang University of Chinese Medicine,Heilongjiang Harbin 150040,China)

机构地区：[1]南京工业大学交通运输工程学院,江苏南京210009 [2]中国地质调查局国土资源实物地质资料中心,河北三河065201 [3]黑龙江中医药大学附属第一医院,黑龙江哈尔滨150040

出　　处：《地震科学进展》2022年第12期566-573,共8页Progress in Earthquake Sciences

基　　金：国家自然科学基金项目(U2039208,U1839202)资助。

摘　　要：依据龙头山集镇6个典型场地上的钻探资料及土体的动力非线性特性试验数据,分别建立了相应场地的地震反应分析模型。以幅值折半的龙头山镇强震动台站(053LLT)东西向主震加速度记录作为入射地震动,采用一维土层地震反应分析等效线性化方法计算了场地地震反应,讨论了近地表覆盖土层结构对地震动加速度峰值及反应谱的影响,并对场地效应与震害的关系进行了分析。Based on the drilling data of six typical sites in Longtoushan town and the test data of dynamic nonlinear characteristics of soil,the seismic response analysis models of the corresponding sites were established respectively.Under the action of ground motion acceleration in east-west direction obtained by Longtoushan town strong observation station(053LLT)during Ludian earthquake with half-amplitude,the equivalent linearization method of one-dimensional soil layer seismic response analysis was used to calculate the seismic response of each site and the effect of near-surface overburden soil layer on peak acceleration.Response spectrum of ground motion was also discussed,and the relationship between site effect and earthquake damage was analyzed.

关 键 词：土层地震反应 场地效应 等效线性化 震害 地震动 

分 类 号：P315.63[天文地球—地震学]