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为了对复杂高层结构进行数值模拟,初步探讨了ABAQUS显式动力模块下的用户材料子程序(VUMAT)的开发过程,给出了可应用于VUMAT接口的单参数混凝土弹塑性模型的显式计算表达式,通过对梁单元的应用初步验证了该材料模型的有效性。最后结合工程实例对数值模拟和振动台试验结果进行了对比分析研究。分析结果表明,所建立的分析模型不但能够较为准确地判断高层结构在大震作用下的屈服顺序及薄弱部位,而且能够方便地考虑结构塑性阶段的损伤扩展情况。
In order to simulate complex high-rise structures, the development process of user material subroutine (VUMAT) under ABAQUS explicit power module is discussed. The explicit expression of single-parameter concrete elastic-plastic model applicable to VUMAT interface is given The validity of the material model is verified through the application of beam elements. Finally, the numerical simulation and shaking table test results are compared and analyzed with engineering examples. The analysis results show that the established analytical model can not only judge the yield order and weak area of high-rise structure under the action of large earthquake more accurately, but also easily consider the damage expansion of the plastic structure.