岩土工程学报2017，Vol.39Issue(6)：996-1003,8.DOI:10.11779/CJGE201706004
堆石料广义塑性模型研究
Generalized plasticity model for rockfill materials
摘要
Abstract
Based on the experimental results and previous studies,the stress ratio at the failure (Mf) under different confining pressures is modified,and the pressure dependency of plastic modulus is discussed.Considering the idea that the hardening rule of Lade-Duncan single yield surface model is defined by introducing plastic work to yield surface expression,the plastic modulus is modified using the plastic work within the framework of the generalized plasticity theory,and a modified P-Z model is proposed.To check the validity of the improved method,the modified approach is applied to the constitutive model by Liu et al.,and the modified P-Z model is employed to simulate the other two triaxial tests on rockfill materials.Satisfactory agreement between the numerical and experimental results under different confining pressures confirms the capability of the modified model in improving the prediction of stress-strain behaviour of rockfill materials.关键词
广义塑性模型/塑性功/塑性模量/三轴试验/模型验证Key words
generalized plasticity model/plastic work/plastic modulus/triaxial test/model validation分类
建筑与水利引用本文复制引用
卞士海,李国英,魏匡民,周健..堆石料广义塑性模型研究[J].岩土工程学报,2017,39(6):996-1003,8.基金项目
水利部公益性行业专项经费项目(201501035) （201501035）
国家自然科学基金青年科学基金项目(51509163) （51509163）
