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

被引:0
作者
XIAO Yang [1 ,2 ,3 ]
LIU HanLong [1 ,2 ]
YANG Gui [2 ,3 ]
CHEN YuMin [2 ,3 ]
JIANG JingShan [2 ,4 ]
机构
[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
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TV41 [水工材料试验];
学科分类号
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.
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页码:1636 / 1646
页数:11
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