最大剪切模量对土动力参数及地震反应的影响  

Influence of maximum shear modulus on dynamic parameters and seismic response of soil layer

作　　者：冯志仁[1] 郭德存[2] 刘红帅[3] 陈学良[3] 

机构地区：[1]吉林大学综合信息矿产预测所,吉林长春130026 [2]中国水电工程顾问集团公司,北京100011 [3]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《自然灾害学报》2007年第3期90-95,共6页Journal of Natural Disasters

基　　金：国家科技支撑计划资助项目(2006BA13801)

摘　　要：最大剪切模量是影响土的动剪切模量比、阻尼比和土层地震反应的最重要参数之一。通常采用室内应变法来确定最大剪切模量,给出土的动剪切模量比和阻尼比,而采用现场剪切波速法求得的结果则很少见。研究了剪切波速法和应变法所确定的最大剪切模量对土动剪切模量比、阻尼比和土层地震反应的影响,推导了两种方法所确定的动剪切模量比和阻尼比之间的关系式。结果表明:最大动剪切模量对土的动剪切模量比、阻尼比和土层地震反应的影响很显著。Maximum shear modulus is one of the most ratio and seismic response of soil. Usually, maximum important parameters effecting shear modulus ratio, damping shear modulus is determined by strain method in laboratory, rather than by shear velocity method in-situ, and based on it, shear modulus ratio and damping ratio of soil can be provided. The effect of maximum shear modulu by shear velocity method and shear strain method on shear modulus ratio, damping ratio and seismic response of soil are studied. And, the relationship of shear modulus ratio and damping ratio for two methods is established. The results show that the effects of maximum shear modulus on shear modulus ratio, damping ratio and seismic response of soil are obvious and can not be neglected.

关 键 词：最大剪切模量 动剪切模量比 阻尼比 土层地震反应 

分 类 号：TU435[建筑科学—岩土工程]