基于扰动应力场模型的ABAQUS二次开发及其与塑性损伤模型的比较  

Secondary development of ABAQUS based on disturbed stress field model(DSFM) and its comparison with damage plasticity model

作　　者：黄正[1] 吕志涛[1] 涂永明[1] 

机构地区：[1]东南大学,江苏南京210096

出　　处：《土木工程学报》2016年第5期40-49,共10页China Civil Engineering Journal

基　　金：国家自然科学基金(51378104)

摘　　要：扰动应力场模型(DSFM)由于考虑了裂缝间的剪切滑移效应,融合了转动裂缝模型和固定裂缝模型的思想,可以更真实地模拟钢筋混凝土构件的受剪性能。通过大型通用有限元软件ABAQUS的二次开发接口,开发了基于DSFM模型思想的用户子程序UMAT,重点介绍将剪切滑移应变从总应变中分离出来的算法,并给出能够适应UMAT开发要求的编程方法和流程。利用所开发的UMAT子程序和ABAQUS内置的塑性损伤(CDP)模型对多伦多大学完成的多块钢筋混凝土平板试验进行分析。结果表明,所开发的子程序能够准确反应不同配筋形式的钢筋混凝土单元在不同受力状态下的响应,而ABAQUS内置的CDP模型由于无法反应钢筋混凝土单元斜裂缝出现后的剪应力强化效应,不能用于钢筋混凝土的受剪性能分析。Due to the inclusion of shear slip effect within the cracks and the consideration of both the fixed clack model and the rotating crack model, the disturbed stress field model （DSFM） can more realistically simulate the shear behavior of the reinforced concrete members. With the aid of the secondary development interface provided by the finite element software ABAQUS, a user material subroutine （UMAT） is developed for the DSFM. The algorithm of separating the shear slip strain from the total strain was particularly described, and then, the programming flowchart and method for the development of UMAT were introduced. The responses of reinforced concrete panels tested in the University of Toronto were analyzed using the developed UMAT subroutine for DSFM and the built-in concrete damage plasticity model of ABAQUS （CDP）. The comparison results show that the developed UMAT subroutine can precisely predict the behavior of the RC elements with different reinforcement and different loading conditions, while the built-in CDP model of ABAQUS can＇ t be used to analyze the shear behavior of RC members, since it is incapable of reflecting the shear- stiffening effect after the occurrence of shear cracks in RC elements.

关 键 词：扰动应力场模型(DSFM) 受剪性能 ABAQUS用户子程序UMAT 塑性损伤模型 

分 类 号：TU375[建筑科学—结构工程]