基于ABAQUS的钢筋受拉破坏模拟

摘要

在对钢筋混凝土结构的倒塌行为进行有限元分析时,合理地模拟钢筋的破坏是准确地模拟结构倒塌行为的重要前提.大型通用有限元分析软件ABAUQS已被较多地应用于混凝土结构倒塌行为的分析与研究中,而在相关的研究文献中,甚少采用ABAQUS自带的累积损伤破坏模型对钢筋的受拉破坏进行模拟.采用ABAQUS自带模型对有限元建模非常方便,可不必自定义材料的子程序.因此,文中将对累积损伤破坏模型进行详细描述,并对其模拟钢筋受拉破坏时的参数取值进行研究,确定相关参数的取值方法.本研究将为钢筋混凝土结构倒塌行为的有限元分析提供新的参考方法.%In order to accurately analyze the collapse behavior of reinforcement concrete (RC) structures,it was significant to rationally simulate the failure of the steel bar in tension.The general-purpose simulation tool ABAQUS has been used widely in the finite element (FE) analysis of the collapse behavior of RC structures,but the progressive damage and failure model which embedded in ABAQUS was not used to simulate the failure of steel bar in related literatures.Obviously,it was more convenient to use the material model embedded in ABAQUS,the user-defined material subroutine was in a finite element model.In the paper,the progressive damage and failure model was described in detail and the value of the parameters in the model for the steel bar was studied and determined.The study would provide a new reference method for the simulation of the collapse behavior of RC structures.