岩土工程学报2011，Vol.33Issue(7)：1058-1065,8.
基于本构积分算法的岩体结构面三维弹塑性有限元模型
Three-dimensional elastoplastic model for rock joint elements based on integration algorithm
摘要
Abstract
The mechanical behaviours of rock mass of major civil engineering are dramatically affected by the presence of joints,and the major discontinues can cause a variety of problems in both surface and underground constructions.Realistic simulation of the mechanical behaviours of rock joints becomes an important part of modelling the rock mass.A three-dimensional joint element based on the framework of elastoplastic constitutive model is proposed to account for dilatancy,roughness and undulating surface of discontinuities.To simulate the behaviours of joints under complex loading condition,dilatancy and reduction zone are suggested.An integration algorithm of constitutive equations based on the Euler backward integral method is used,and the consistent tangential matrices are derived.An ABAQUS user-defined element subroutine using this model is programmed,three experiments of direct shear tests,cyclic shear tests and restricted normal stiffness shear tests are simulated by ABAQUS,and the calculated results are analyzed to verify this method.关键词
结构面单元/本构积分/ABAQUS/一致切线模量Key words
rock joint element/constitutive integration algorithm/ABAQUS/consistent tangent stiffness分类
建筑与水利引用本文复制引用
朱福巍,兑关锁,任青文..基于本构积分算法的岩体结构面三维弹塑性有限元模型[J].岩土工程学报,2011,33(7):1058-1065,8.基金项目
国家自然科学基金重点项目 （）
国家基础研究发展计划（973项目） （）
