ANSYS三维模型中SOLID65单元的内力提取问题

Internal Force Retrieval from FEM Model Built with ANSYS SOLID65 Elements

ANSYS有限元程序中的SOLID65单元是一种适合描述钢筋混凝土结构的三维单元。由于加强材料在本构矩阵中的组结方式,使用该单元建立的钢筋混凝土模型在进行常规内力提取时会发生错误。在分析单元本构矩阵组结的基础上,正确的内力提取方式被提出。通过例题验证了该提取方法的正确性,并和常规方式进行了对比。

ANSYS Solid65 element is a 3D concrete element with or without reinforcing bars. Due to its constitutive matrix formula, conventional way to retrieve internal force from model built with this element may cause incorrect results. In order to get the right internal force, necessary modifications are proposed based upon element theory. Errors caused by conventional retrieval are shown by test examples.