结构性Q_2,Q_3黄土的力学特性对比研究  

Comparative study on mechanical features of structural Q_2 and Q_3 loess

作　　者：谢星[1] 赵法锁[2] 王艳婷[2] 林斌[3] 王东红[4] 

机构地区：[1]长安大学地球科学与国土资源学院,陕西西安710054 [2]长安大学地质工程研究所,陕西西安710054 [3]安徽理工大学土木工程系,安徽淮南232001 [4]机械工业勘察设计研究院,陕西西安710043

出　　处：《西安科技大学学报》2006年第4期451-455,468,共6页Journal of Xi’an University of Science and Technology

基　　金：科技部项目(2002CCC00200)

摘　　要：通过对Q2和Q3黄土的单轴压缩和常规三轴试验研究,对两种黄土单轴压缩曲线和CU剪切的应力应变曲线特征进行分析比较,探讨了两种黄土应力应变本构模型。研究表明:强软化型Q2黄土应力应变关系,可采用强软化型模型进行描述,并对其模型参数进行了分析;弱软化-硬化型Q3黄土应力应变关系可用两参数的指数模型描述,也可用强软化性模型描述。On the basis of the uniaxial compressive test and routine triaxial test results of Q2 and Q3 loess, the features of strain - stress curves of Q2 and Q3 loess are compared. The stress-strain constitutive models of two types of loess are discussed, the results show that the strong softening strain-stress constitutive relationship of Q2 loess can be described by strong softening model, and the model parameters are analysed, strain - stress constitutive relationship Q3 loess with weak softening - harden can be described both by strong softening model and exponential model with two parameters.

关 键 词：Q2和Q3黄土 力学特性 应力-应变本构模型 

分 类 号：TU41[建筑科学—岩土工程]