Modified Cam-Clay model incorporating unified nonlinear strength criterion  

作　　者：XIAO Yang LIU HanLong LIANG Robert Y 

机构地区：[1]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University, Nanjing 210098,China [2]2 Geotechnical Research Institute,Hohai University,Nanjing 210098,China [3]Department of Civil Engineering,University of Akron,Akron 44325,USA

出　　处：《Science China(Technological Sciences)》2011年第4期805-810,共6页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China for Distinguished Young Scholar (Grant No. 50825901);the Public Service Sector R&D Project of Ministry of Water Resource of China (Grant No. 200801014);Scientific Innovation Research Scheme for Jiangsu University Graduate (Grant No. CX10B_207Z);Jiangsu Civil Engineering Graduate Center for Innovation and Academic Communication Foundation

摘　　要：A unified nonlinear strength criterion(i.e UNS criterion) is proposed,for the sake of versatility,to capture the complex strength behaviors of frictional materials in geotechnical field.It covers wide ranges on the meridian and octahedral planes to describe nonlinear strength behaviors of soils.The Modified Cam-Clay model,incorporating the unified nonlinear strength criterion,is employed as an example to derive working mathematical equations and to illustrate yielding surfaces in three-dimensional stress space for improving the model's predictive capability.The unified nonlinear strength criterion,demonstrated here,is capable of capturing the experimental results of different types of soils on the meridian and octahedral planes.In addition,the revised model,based on this unified nonlinear strength criterion,though very simple,is versatile to predict the true triaxial test results from literature when considering the influences of the intermediate principal stress on strength and deformation under complex stress conditions.

关 键 词：nonlinear strength CRITERION FAILURE constitutive model complex stress condition 

分 类 号：TU41[建筑科学—岩土工程] TU452[建筑科学—土工工程]