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为准确合理模拟钢筋混凝土构件在大震作用下的地震反应,利用大型通用有限元软件ABAQUS提供的用户材料子程序VUMAT接口,开发了能够用于显式分析的梁单元混凝土材料本构模型。讨论了适用于ABAQUS显式分析的钢筋混凝土构件梁单元构建方法及求解拟静力和动力问题所采用的技术措施。利用所开发的材料模型,通过动力显式分析对大量试验进行了非线性数值模拟分析,并与试验结果进行比较,验证了本构模型和建模方法的可靠性。结果表明,基于ABAQUS软件所开发的混凝土材料模型具有较高的精度和较为广泛的适用性,能够较精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 accurately and accurately simulate the seismic response of reinforced concrete members subjected to large earthquakes, a constitutive model of concrete girder members for explicit analysis was developed by using the user materials subroutine VUMAT interface provided by ABAQUS, a large general-purpose finite element software. The construction method of beam elements for reinforced concrete members which is suitable for ABAQUS explicit analysis and the technical measures adopted to solve quasi-static and dynamic problems are discussed. By using the developed material model, a large number of tests were carried out by numerical simulation of dynamic analysis and compared with the experimental results to verify the reliability of the constitutive model and the modeling method. The results show that the concrete material model developed by ABAQUS software has higher accuracy and wider applicability, and can simulate the nonlinear behavior of reinforced concrete members under the joint action of bending moment, bending moment and axial force more accurately. As the basis for further research.