考虑损伤的混凝土用户材料子程序二次开发及验证

Secondary development and verification of user subroutines of concrete material considering damage

基于《混凝土结构设计规范》(GB 50010—2010)给出的考虑损伤的混凝土本构关系,利用ABAQUS软件提供的二次开发接口,分别开发了隐式混凝土用户材料子程序UMAT及显式混凝土用户材料子程序VUMAT。采用开发的用户材料子程序,首先计算了与给定应变历程对应的应力-应变滞回曲线,然后对不同荷载作用下的钢筋混凝土柱和平面框架进行了模拟,对其分别在材料、构件和结构层次上进行了验证。结果表明开发的混凝土用户材料子程序具有较高的计算精度和效率,能较好地模拟钢筋混凝土构件或结构的静力或动力性能。

According to the concrete constitutive relation considering damage specified in Code for design of concrete structures(GB 50010—2010),the UMAT and VUMAT concrete user material subroutines were developed respectively utilizing the secondary development interface provided in software ABAQUS.Using the above user material subroutines, the stress-strain hysteresis curve corresponding to specified strain history curve was calculated,and the simulations of RC(reinforced concrete) column and plane frame subjected to various loadings were performed respectively.The verifications conducted on material,member and structure level respectively shows that the user material subroutines developed in this paper have relatively high accuracy and efficiency,therefore can be well used to simulate the static or dynamic performance of RC member or structure.