岩土工程学报2002，Vol.24Issue(2)：240-246,7.
黏土和砂土简单的三维本构模型
A simple 3-D constitutive model for both clay and sand
姚仰平 1罗汀 1孙德安 2松冈元2
作者信息
- 1. Department of Civil Engineering, Beijing University of Aeronautics and Astronaustics, Beijing 100083,China
- 2. Department of Civil Engineering,Nagoya Institute of Technology, Nagoya 466-8555, Japan
- 折叠
摘要
Abstract
A simple and unified constitutive model for both clay and sand under three-dimensional stress conditions is derived from the modified Cam-clay model,taking the following two points into consideration.First,a transformed stress tensor based on the SMP (Spatially Mobilized Plane) criterion is applied to the Cam-clay model.The proposed model realizes the consistency from the shear yield to the shear failure and the combination of the idea of the critical state theory with the SMP criterion for clay.Secondly,a new hardening parameter is derived in order to develop a simple and unified constitutive model for both clay and sand.It can not only describe the dilatancy from lightly to heavily dilatant sand,but also be reduced to the plastic volumetric strain for clay.The validity of the hardening parameter is confirmed by the test results of triaxial compression and extension tests on sand under the various stress paths.Only five conventional soil parameters are needed in the proposed model.关键词
黏土/砂土/弹塑性模型/硬化参数/三维化Key words
clays/sands/elasto-plastic model/hardening parameter/three-dimensional stresses分类
建筑与水利引用本文复制引用
姚仰平,罗汀,孙德安,松冈元..黏土和砂土简单的三维本构模型[J].岩土工程学报,2002,24(2):240-246,7.
