ABAQUS纤维单元的混凝土滞回模型的开发

Development of Hysteresis Model of Concrete Based on Fiber Element in Abaqus

介绍了基于ABAQUS的纤维模型程序的开发。虽然ABAQUS的非线性分析能力强大,但其混凝土损伤塑性模型并不支持空间梁单元。因此,现使用其用户界面UMAT开发了适合纤维单元的混凝土单轴滞回模型。低周循环载荷下的3层钢筋混凝土框架的分析结果与试验结果基本吻合,验证了此方法具有良好的精度和收敛性,可以推广用于大型结构弹塑性分析。

The development of the fiber model based on ABAQUS program is described.Although non-linear analysis capabilities of ABAQUS was powerful,but its concrete damage plasticity model was not appropriate for the space beam element.Therefore,a fiber element uniaxial hysteretic model is developed throuth its user interface UMAT.A simulation of a three-story reinforced concrete frame under lateral cyclic loading experiment was carried out.Results verify this method have good accuracy and convergence and can be extended to elastic-plastic analysis of large structures.