混凝土塑性损伤模型损伤因子研究及其应用

摘要

In the FEA software of ABAQUS, a material model of "plastic -damage model" is defined for concrete. It can simulate the typical mechanics behaviour of concrete such as crack and crush, and can be used conveniently. Based on energy loss theory, relevant calculation program was developed to obtain damage factor correspond to concrete compression and tension stress versus strain relationship curves in Code for design of concrete structures. Based on the results in this paper, applications of damage factor in R. C. Member, new type joint of CFST column and R. C. Beam, and elastic -plastic analysis of the whole structure were presented. The research in this paper may be referred for correlative research.%在有限元软件ABAQUS中,为混凝土材料定义了一种材料模型:塑性损伤模型,它可以模拟混凝土材料的拉裂和压碎等力学现象,而且使用也较为方便.本文基于能量损失原理,编制相关的计算程序,获得了现行《混凝土结构设计规范》提供的混凝土受压和受拉应力-应变关系曲线对应的混凝土损伤因子随应变增长的变化曲线.基于本文的研究成果,介绍了损伤因子在钢筋混凝土构件、新型钢管混凝土-钢筋混凝土梁节点和整体结构弹塑性分析中的应用实例.本文的有关论述和方法可为同类研究提供参考.