Softening response under undrained compression following anisotropic consolidation  

作　　者：余闯 许强 尹振宇 

机构地区：[1]College of Architecture and Civil Engineering,Wenzhou University [2]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology [3]Department of Civil Engineering,Shanghai Jiao Tong University

出　　处：《Journal of Central South University》2013年第6期1703-1712,共10页中南大学学报（英文版）

基　　金：Project(SKLGP2011K013)supported by the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,China;Project(20110073120012)supported by the Research Fund for the Doctoral Program of Higher Education of China;Project(11PJ1405700)supported by the the Shanghai Pujiang Talent Plan,China;Project(41002091)supported by the National Natural Science Foundation of China

摘　　要：Experimental evidence has indicated that clay exhibits strain-softening response under undrained compression following anisotropic consolidation.The purpose of this work was to propose a modeling method under critical state theory of soil mechanics.Based on experimental data on different types of clay,a simple double-surface model was developed considering explicitly the location of critical state by incorporating the density state into constitutive equations.The model was then used to simulate undrained triaxial compression tests performed on isotropically and anisotropically consolidated samples with different stress ratios.The predictions were compared with experimental results.All simulations demonstrate that the proposed approach is capable of describing the drained and undrained compression behaviors following isotropic and anisotropic consolidations.Experimental evidence has indicated that clay exhibits strain-softening response under undrained compression following anisotropic consolidation. The purpose of this work was to propose a modeling method under critical state theory of soil mechanics. Based on experimental data on different types of clay, a simple double-surface model was developed considering explicitly the location of critical state by incorporating the density state into constitutive equations. The model was then used to simulate undrained triaxial compression tests performed on isotropically and anisotropically consolidated samples with different stress ratios. The predictions were compared with experimental results. All simulations demonstrate that the proposed approach is capable of describing the drained and undrained compression behaviors following isotropic and anisotropic consolidations,

关 键 词：STRAIN-SOFTENING CLAY constitutive relation PLASTICITY critical state CONSOLIDATION 

分 类 号：TU43[建筑科学—岩土工程]