西安地区典型土动剪切模量比和阻尼比的统计研究  

Statistical study on dynamic shear modulus ratio and damping ratio of typical soils in Xi'an area

作　　者：陈党民[1] 田伟新[1] 段蕊[1] 

机构地区：[1]陕西省地震局,陕西西安710068

出　　处：《世界地震工程》2012年第3期136-142,共7页World Earthquake Engineering

基　　金：陕西省防震减灾"十一五"重点项目(SCZC2008-450)资助

摘　　要：利用西安市地震小区划项目中的大量典型土样动三轴试验结果,采用双曲线模型拟合得到了西安地区粉质粘土、粉土、砂土和卵砾土的动剪切模量比和阻尼比随剪应变的变化关系,给出了西安地区上述4种主要土壤类型在8个典型应变下的动参数值。所提结果对研究西安地区地基振动反应和场地地震安全性评价等工作具有参考和借鉴作用。By use of a large number of typical dynamic triaxial test results of soil samples in the Project of Xi＇ at, Seismic Microzoning, the changes of dynamic shear modulus ratio and damping ratio of silty clay, silt, sand and gravel soil with shear train,were obtained by the hyperbolic model fitting and the dynamic parameters of above 4 main types of soil in Xi＇an area under 8 typical strains were given. The results of this study are of referential values to the research on ground vibration response and seismic safety evaluation for engineering sites in Xi＇an area.

关 键 词：动剪切模量比 阻尼比 典型土 西安地区 

分 类 号：P315.9[天文地球—地震学]