非饱和Q_2原状黄土应变硬化本构模型试验研究  

Experimental study on strain hardening constitutive model of unsaturated Q_2 undisturbed loess

作　　者：金艳丽 黄小华 Jin Yanli;Huang Xiaohua(Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University. Nanning 530004. China)

机构地区：[1]广西大学土木建筑工程学院工程防灾与结构安全教育部重点实验室,广西南宁530004

出　　处：《江苏科技信息》2019年第4期28-30,共3页Jiangsu Science and Technology Information

基　　金：国家自然科学基金项目;项目编号:51569004

摘　　要：文章对非饱和Q_2原状黄土开展常含水量三轴剪切(CW)试验进行研究,发现其应力应变关系呈应变硬化型。据试验结果及Duncan-Chang双曲线模型进行拟合,得到了原状非饱和黄土非线性弹性本构模型及切线模量的表达式,该模型考虑了基质吸力和围压二重因素的影响,具有较好的适用性。The constant water content triaxial shear(CW)test was carried out on the undisturbed Q2:unsaturated loess.The stress-strain behaviour takes on a strong strain-hardening type.Based on the experimental results and Duncan-Chang hyperbolic model,the nonlinear elastic constitutive model of undisturbed unsaturated loess is obtained.The model has good applicability which takes the influence of matrix suction and confining pressure into account.

关 键 词：非饱和原状黄土 应变硬化 非线性弹性 本构模型 

分 类 号：S1[农业科学—农业基础科学]