中文摘要：

为了在有限元软件ABAQUS中实现用纤维梁单元模拟钢筋混凝土构件,通过ABAQUS自身提供的隐式模块下的用户自定义子程序接口UMAT,在软件中开发了用于纤维梁单元的混凝土单轴本构滞回模型。利用所开发模型,通过静力分析模块对钢筋混凝土梁、板单调加载试验试件和柱、剪力墙低周反复加载试验试件进行非线性数值模拟分析;同时通过动力隐式分析模块对一组钢筋混凝土框架振动台试验试件进行了弹塑性时程分析,并与试验结果进行比较。结果表明,本文基于ABAQUS软件二次开发的混凝土单轴滞回模型具有较高的精度和较为广泛的适用性,能够较准确地模拟钢筋混凝土构件在弯矩及弯矩和轴力共同作用下的非线性行为,可以作为下一步研究的基础。

英文摘要：

In order to analyze reinforced concrete（ RC） members by using fiber beam element in finite element program ABAQUS,a kind of concrete uniaxial constitutive model is developed utilizing the subprogram UMAT provided by ABAQUS. To verify the reliability of the developed model,inelastic static analysis of several test specimens,including the RC beam and slab under monotonic loading,and the RC column and shear wall under quasi-static reversed cyclic loading are carried out. Besides,inelastic dynamic analysis of a RC frame under shaking table test is conducted through the implicit dynamic analysis option. Comparison between the test and analysis results indicates that the developed constitutive model possesses good accuracy and wide applicability; the model can accurately reflect the inelastic behavior of RC members under bending moment or combination of moment and axial force,and it could be used for further study.