Dilatancy equation and generalized plastic constitutive model for coarse-grained soils

被引：0

作者：

Guo, Wan-Li ^{[1
]}

Zhu, Jun-Gao ^{[1
,2
]}

Peng, Wen-Ming ^{[3
]}

机构：

[1] Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing,210098, China

[2] Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-Rock Dam of the Ministry of Water Resources, Nanjing,210024, China

[3] China Power Construction Group Chengdu Survey and Design Institute Limited, Chengdu,610072, China

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2018年 / 40卷 / 06期

关键词：

Nonlinear equations - Soil testing - Stiffness matrix - Geotechnical engineering - Soils - Soil mechanics - Coarse-grained modeling;

D O I：

10.11779/CJGE201806016

中图分类号：

学科分类号：

摘要：

A new dilatancy equation is proposed by adding a factor to the dilatancy equation of Cambridge model, and this factor can adjust the shape of curve between the dilatancy ratio and the stress ratio for coarse-grained soils, and can reflect the nonlinear relationship. Thus a new constitutive model based on the generalized plastic theory is proposed. The main conclusions are as follows: (1) The method of determining the parameters of the proposed dilatancy equation is simple, and its capability to reflect the dilatancy properties of coarse-grained soils is verified by CD tests; (2) There are 9 parameters in this model and their definitions are clear, and the methods to determine parameters through the indoor tests are given; (3) According to the generalized plastic constitutive model, the stiffness matrix under the general stress state is deduced, and the triaxial constant p tests and two-stage constant-stress-ratio tests are carried out to verify its rationality. © 2018, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.

引用

页码：1103 / 1110