Modeling and behaviours of rockfill materials in three-dimensional stress space  

作　　者：XIAO Yang LIU HanLong ZHU JunGao SHI WeiCheng 

机构地区：[1]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China [2]Geotechnical Research Institute,Hohai University,Nanjing 210098,China [3]School of Civil Engineering and Architecture,Changzhou Institute of Technology,Changzhou 213002,China

出　　处：《Science China(Technological Sciences)》2012年第10期2877-2892,共16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);the Fundamental Research Funds for the Central Universities (Grant No. 2011B14514);Jiangsu Civil Engineering Graduate Center for Innovation and Academic Communication Foundation

摘　　要：A bounding surface model incorporating a unified nonlinear strength criterion is proposed.The proposed bounding surface model contains 9 model parameters,which can be determined from the conventional triaxial tests.The bounding surface model can reproduce such behaviours as the strain hardening,the post-peak strain softening,and the volumetric strain contraction and expansion.Based on the comparisons between the predictions and the test results,the proposed strength criterion and model can well reproduce the experimental results of the strength and stress-strain behaviours of rockfill material in three-dimensional stress space.The strength behaviour of rockfill material is summarized as:(a) the failure stress ratio decreases with the initial confining pressure on the meridian plane;(b) the failure deviatoric stress decreases with the Lode angle from 0o to 60o on the deviatoric plane.The stress ratio decreases with increasing one of such factors as the initial void ratio,the intermediate principal stress ratio and the minor principal stress at the same strain when the other factors are given.

关 键 词：bounding surface STRENGTH STRESS-STRAIN three-dimensional stress constitutive model rockfill materials 

分 类 号：TB30[一般工业技术—材料科学与工程]