A 3D bounding surface model for rockfill materials  

作　　者：XIAO Yang LIU HanLong ZHU JunGao SHI WeiCheng LIU MengCheng 

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 [4]College of Architecture and Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China

出　　处：《Science China(Technological Sciences)》2011年第11期2904-2915,共12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 Key Project of National Natural Science Foundation of China and Yalongjiang Hydro-electric Development Joint Research Fund (Grant No. 50639050);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. 2010B15014);Scientific Innovation Research Scheme for Jiangsu University Graduate (Grant No. CX10B_207Z)

摘　　要：A 3D bounding surface model is established for rockfill materials,which can be applied to appropriately predict the deformation and the stabilization of rockfill dams.Firstly,an associated plastic flow rule for rockfill materials is investigated based on the elaborate data from the large-style triaxial compression tests and the true triaxial tests.Secondly,the constitutive equations of the 3D bounding surface model are established by several steps.These steps include the bounding surface incorporating the general nonlinear strength criterion,stress-dilatancy equations,the evolution of the bounding surface and the bounding surface plasticity.Finally,the 3D bounding surface model is used to predict the mechanical behaviors of rockfill materials from the large-style triaxial compression tests and the true triaxial tests.Consequently,the proposed 3D bounding surface model can well capture such behaviors of rockfill materials as the strain hardening,the post-peak strain softening,and the volumetric strain contraction and expansion in both two-and three-dimensional stress spaces.

关 键 词：rockf＇di material STRENGTH DILATANCY 3D bounding surface constitutive model 

分 类 号：TU411.7[建筑科学—岩土工程] TP391.41[建筑科学—土工工程]