基于ABAQUS软件的RC Z形柱框架节点仿真分析

ABAQUS-based modeling analysis for the frame joints of RC Z-shaped columns

混凝土损伤塑性模型是有限元分析软件ABAQUS中的一种材料模型,能够较好的描述混凝土的材料特性,运用ABAQUS软件提供的混凝土损伤塑性模型参数与Sidiroff提出的能量等价原理结合起来推导出损伤因子的计算式,这种损伤塑性模型具有较高的模拟精度,可用于实际复杂混凝土构件的设计与分析.用ABAQUS对Z形柱框架节点进行仿真分析,混凝土本构关系分别采用规范中的表达式和Hongnestad表达式,得到混凝土等效塑性应变云图,将节点荷载-位移骨架曲线与试验结果进行对比,给出黏性系数的最佳取值范围,可为工程应用提供参考.

The damage plastic model of concrete is a material one provided in the finite element software ABAQUS.It can better describe the material characteristic of concrete.An expression of the damage factor is derived based on the damage model parameters of concrete provided by the software ABAQUS and the energy equivalence principle proposed by Sidiroff.This damage plastic model is of higher modeling accuracy and can be used for the design and analysis of complicated concrete structures.The modeling analysis of the frame joints of Z-shaped columns is conducted with the software ABAQUS.Two constitutive relationships of concrete,provided in the code and presented by Hongnestad,respectively,are adopted and the equivalent plastic strain cloud in concrete is obtained.The calculated load-displacement curve at the joint is compared with test results.The optimal range of the viscous coefficient is given,which provides reference for engineering applications.