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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。
In order to simulate reinforced concrete members with fiber beam elements in the ABAQUS finite element software, a user-defined subroutine interface UMAT under the implicit module provided by ABAQUS itself was developed in the software for concrete single-shaft Hysteretic model. By using the developed model, through the static analysis module, the nonlinear numerical simulation analysis is carried out on the monotonous reinforced concrete beam and slab monotonous loading test specimen and the column and shear wall low cycle repeated loading test specimen. At the same time, through the dynamic implicit analysis module, Elasto-plastic time-history analysis was carried out on the test specimens of the group shaking table of reinforced concrete frame and compared with the test results. The results show that the single-hysteretic concrete hysteresis model developed in this paper based on ABAQUS software has high accuracy and wide applicability and can simulate the effect of bending moment, bending moment and axial force on the strength of reinforced concrete members Non-linear behavior, can be used as the basis for further research.