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 sim-ulation 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.%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.
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