非饱和土本构模型中考虑含水率的应力-应变曲线的构建方法  

Methods of stress-strain relationship curve considering water contents in unsaturated soil constitutive model

作　　者：陈茜[1] 郭鸿[1] 

机构地区：[1]陕西理工学院土木工程与建筑学院,陕西汉中723001

出　　处：《土木建筑与环境工程》2015年第4期97-104,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：中央高校基本科研业务费基础研究计划项目(310829151076)~~

摘　　要：非饱和土的变形除受应力影响外,还与土中含水率及其变化有关。在非饱和土计算模型中引入含水率,虽然建立的是经验公式,但非常直观,作为一种近似而实用的处理方法值得深入研究和进一步发展。分别从加工硬化曲线的试验参数与含水率的关系和加工硬化曲线的割线模量与含水率的关系两个不同的角度出发,提出了考虑含水率的应力-应变关系曲线的构建方法。结合具体试验展示了2种方法的实现过程,并对模型的合理性进行检验。检验的结果表明2种方法的计算值均能于试验值较好吻合。依据试验结果对2种模型进行了比较。结果表明方法1的计算值要比方法2的计算值稍小。Both water content and stress influence the deformation of unsaturated soils.Although the formula established by introducing water content to the unsaturated soil calculation model is empirical formula,it is extremely intuitive,and important to develop further.Based on the relation of test parameters of harden curve and water contents,and the relation of secant modulus of harden curve and water content,two approaches where water content is taken account of are established.Experiment is conducted to present the realizing processes of two methods,and the models are also verified.The results show that the results of the two methods both agree with test data very well.and the results of method one are smaller than those of method two.

关 键 词：应力 应变 含水率关系 曲线 方法 

分 类 号：TU435[建筑科学—岩土工程]