岩土工程学报2017，Vol.39Issue(3)：554-561,8.DOI:10.11779/CJGE201703021
基于扰动状态概念硬化参量的结构性黏土边界面模型
Bounding surface plasticity model for structured clays using disturbed state concept-based hardening variables
摘要
Abstract
Under the framework of bounding surface plasticity and critical state concept, by introducing the disturbed state concept for hardening variables of elastic behavior, structured yield surface, structured bonding adhesive stress and surface anisotropy, an elastoplastic model for structured clays is proposed. First, three structural disturbance degrees are defined to describe the disturbances of soils due to plastic strains to the size of yield surface, the adhesive stress and the yield surface anisotropy. The elastic law is also enhanced by considering anisotropy and disturbance. The model is then used to simulate the oedometer tests and undrained triaxial compression tests on two typical structured clays, Shanghai clay and Vallericca stiff clay. Finally, implementing the proposed model into a finite difference code as a user defined model, a biaxial shearing test is carried out to show the model ability in describing the development of structural disturbance degrees and its distributions in soils caused by plastic straining.关键词
黏土/结构性/边界面模型/扰动状态/弹塑性Key words
clays/soil structure/bounding surface model/disturbance state/elastoplasticity分类
建筑与水利引用本文复制引用
杨杰,尹振宇,黄宏伟,金银富,张冬梅..基于扰动状态概念硬化参量的结构性黏土边界面模型[J].岩土工程学报,2017,39(3):554-561,8.基金项目
国家自然科学基金项目(41372285,51579179) （41372285,51579179）
国家重点基础研究发展计划("973"计划)项目(2011CB013800) （"973"计划）
