辽西风积土动剪切模量与阻尼比特性试验研究  

EXPERIMENTAL STUDY ON DYNAMIC SHEAR MODULUS AND DAMPING RATIO OF AEOLIAN SOIL IN WEST LIAONING PROVINCE

作　　者：张向东[1] 冯胜洋[1] 张建俊[1] 

机构地区：[1]辽宁工程技术大学土木与交通学院,阜新123000

出　　处：《力学与实践》2011年第1期48-52,共5页Mechanics in Engineering

基　　金：国家自然科学基金(5097813);辽宁省高等学校优秀人才支持计划(2008RC23)资助项目

摘　　要：研究辽西风积土的动力特性离不开其动剪切模量与阻尼比这两个最基本的参数.通过一系列动三轴试验,分析了围压、固结比、振动频率对原状风积上的动剪切模量与阻尼比的影响情况,并探讨了其产生的机理.通过试验数据分析表明,风积土的动剪切模量随围压的增大而增大,但阻尼比随围压的增大而减小;动剪切模量随固结比的增大而增大,阻尼比随固结比的增大而减小;动剪切模量和阻尼比均随振动频率的增大而增大,但影响较小,不如前两个因素明显.Dynamic shear modulus and damping ratio are two main parameters when dynamic performance of aeolian soil in west Liaoning province is researched.This paper analyses the influence of confining pressure, consolidation ratio and frequency of vibration on dynamic shear modulus and damping ratio of aeolian soil though a series of dynamic triaxial tests.Experimental results show that the dynamic shear modulus of aeolian soil increases with the confining pressure and the consolidation ratio up,just the opposite,the damping ratio decreases;the dynamic shear modulus and the consolidation ratio decreases with the frequency of vibration up, but unlike the two factors above,the influence is small.

关 键 词：动剪切模量 阻尼比 风积土 围压 固结比 振动频率 

分 类 号：TU435[建筑科学—岩土工程]