摘要
提出了一个简单的混凝土三维本构模型,基于塑性流动理论,混凝土的非线性受压特性通过屈服条件、流动和硬化规则描述.编制了钢筋混凝土结构非线性分析8节点和20节点的三维等参单元程序.程序中钢筋分别采用分离与分布模式模拟.通过三个经典的算例对比分析,表明了提出的混凝土本构模型能够有效地模拟结构的破坏荷载和破坏全过程.
A simple three - dimensional constitutive relation for concrete is presented. Based on the flow theory of plasticity, the nonlinear compressive behaviour of concrete is characterized by the yield condition, the flow and hardening rules. A program which can analyze nonlinear properties of reinforced concrete structures under three - dimension stress conditions is written and the elements are the 8 - node and 20 - node isoparametrie ones. Two models of reninforcing bar, being seperated and distributive, are considered in the program. Compared with three classical examples of concrete structures, the numerical examples show that the eollapse loads and the failure performance of structure can be effectually simulated by the present constitutive relation for concrete.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2005年第4期114-120,共7页
Natural Science Journal of Xiangtan University
基金
深圳大学科研基金资助(200110)
关键词
三维有限元
钢筋混凝土
非线性
本构关系
8节点等参单元
20节点等参单元
three-dimension finite element
reinforeed concrete
nonlinear
eonsitutive relation
8-node isoparametric element
20- node isoparametric element