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本文通过有限元软件ABAQUS提供的VUMAT用户子程序功能,针对纤维梁单元的混凝土和钢筋单轴材料本构关系模型进行了二次开发;并结合清华大学公开的两根钢筋混凝土独立柱和一榀钢筋混凝土框架在往复荷载作用下的推覆试验数据,建立了有限元模型,通过有限元分析和试验结果的对比,验证了本文开发应用的本构模型和分析方法在结构弹塑性分析应用中的精确性。
In this paper, through the function of VUMAT user subroutine provided by finite element software ABAQUS, the second development of the constitutive model of concrete and steel bar uniaxial materials of fiber beam unit is carried out. Combined with two reinforced concrete columns and one Reinforced concrete frame under the action of reciprocating load, a finite element model was established. By comparing the finite element analysis with the experimental results, the constitutive model and analysis method developed and applied in this paper were verified in the application of structural elastoplastic analysis Accuracy.