基于ABAQUS的RC框架节点的有限元分析

文章应用有限元分析软件ABAQUS,采用混凝土损伤塑性模型对钢筋混凝土框架节点的性能进行了非线性有限元分析,其中混凝土与钢筋分别采用实体单元与桁架单元进行分离式建模,并使用Embed技术进行自由度的耦合。将试验结果与有限元分析进行对比,结果表明梁柱节点自由端在竖向单调加载作用下的荷载位移曲线与试验结果比较吻合,计算的变形模式同试件破坏形态一致。文中采用参数分析,探讨了混凝土膨胀角、黏性系数及损伤因子对计算结果的影响,为实际工程中的节点设计提供试验与理论依据。

Finite element analysis of RC frame nodes based on ABAQUS

In this paper,by applying the concrete damage plasticity model,the non-linear finite element analysis of the performance of reinforced concrete(RC) frame nodes is conducted based on the finite element analysis software ABAQUS.Separate modeling is made by using solid elements for concrete modeling and truss elements for steel modeling,and the coupling of degree of freedom is also made based on Embed technology.The comparison between test results and finite element analysis shows that under vertical monotonic loading,the load-displacement curve of the free end of beam column agrees well with the test results,and the analytical deformation modes are consistent with the failure modes of specimen.By the parametric analysis,the impact of concrete expansion angle,viscosity coefficient and damage factor on the analytical results is investigated,providing an experimental and theoretical basis for node design in the actual project.