水利水电技术2017，Vol.48Issue(6)：54-59,140,7.DOI:10.13928/j.cnki.wrahe.2017.06.011
一种新型结构性土三维本构模型
A new type of 3-D constitutive model for structured soil
摘要
Abstract
On the basis of the 3-D constitutive model,which can describe the principle stress effect and is suitable for describing both the strength and the deformation law of the normal consolidated soil,established by NAKAI etc.in accordance with the stress tensor tij and the modified Cam-clay model,a new type of structured 3-D constitutive model suitable for describing the strength and deformation law of structured soil is proposed herein through introducing in the state variable ρ which can describe soil compactness and the state variable ω which can describe bond effect of soil.This model has the following performances:based on the 3-D constitutive model for the normal consolidated soil,the 3-D constitutive model for structured soil can better describe the characteristics of soil sample under 3-D stress state,such as the drained and un-drained shear characteristics,the consolidation performance,the effect from surrounding pressure on stress path and stress-strain curve as well as the reversibility of stress path occurred when the increases of mean stress and deviator stress,etc.under the condition of only adding one material parameter.The type of 3-D constitutive model for structured soil is applied to the simulative calculations for the consolidation test and triaxial shear test made on silty clay,and then the application feasibility of the model in the aspect of simulating the characteristics of structured soil is verified as well.关键词
应力张量tij/修正剑桥模型/正常固结土/结构性土/三维本构模型Key words
stress tensor tij/modified Cam-clay model/normal consolidated soil/structured soil/3-D constitutive model分类
土木建筑引用本文复制引用
邢国起,肖洪天,李大勇..一种新型结构性土三维本构模型[J].水利水电技术,2017,48(6):54-59,140,7.基金项目
山东省住房和城乡建设厅资助项目(KY018) （KY018）
