A constitutive model for the state-dependent behaviors of rockfill material considering particle breakage  

作　　者：XIAO Yang LIU HanLong YANG Gui CHEN YuMin JIANG JingShan 

机构地区：[1]College of Civil Engineering,Chongqing University [2]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University [3]College of Civil and Transportation Engineering,Hohai University [4]School of Civil Engineering,Nanjing Institute of Technology

出　　处：《Science China(Technological Sciences)》2014年第8期1636-1646,共11页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation for Distinguished Young Scholar(Grant No.50825901);the 111 Project(Grant No.B13024);the Program for Changjiang Scholars and Innovative Research Team in University(Grant No.IRT1125);the Project supported by the National Natural Science Foundation of China(Grant No.51379067);the Fundamental Research Funds for the Central Universities(Grant No.2011B14514)

摘　　要：The particle breakage during specimen compaction had more significant influence on the position of the breakage critical-state line(BCSL)of Tacheng rockfill material(TRM)in the e-lnp’plane than the particle breakage during shearing,based on the large-scale triaxial compression tests on TRM in a wide range of densities and pressures.The state-dependent dilatancy and the plastic modulus were correlated to the breakage index,based on the formulations of the BCSL of TRM in the e-lnp’plane.The state-dependent model considering particle breakage was proposed for TRM within the framework of the generalized plasticity theory.The proposed model contained fourteen material constants.The test data of TRM from Group A were adopted to determine these material constants,while the test data from Group B were used independently to validate the model predictive capacity.The comparisons between model simulations and test data illustrated that the model with consideration of particle breakage could well represent the stress-strain behaviors of TRM,e.g.,the strain hardening and volumetric contraction behaviors at a loose state and the strain softening and volumetric expansion behaviors at a dense state,and also the particle breakage behaviors of TRM.

关 键 词：rockfill material particle breakage critical state STRENGTH DILATANCY MODEL 

分 类 号：TV41[水利工程—水工结构工程]