李  正，  朱炳寅
    （中国建筑设计研究院，北京 100044）

[摘要] 以大型通用有限元软件ABAQUS为分析平台，将混凝土精细化的La Borderie弹塑性损伤模型与钢筋由Sakai与Kawashima修正的Menegotto-Pinto模型，通过软件提供的用户材料子程序二次开发接口VUMAT嵌入到ABAQUS中。基于纤维梁柱单元的等效模拟方法，对一钢筋混凝土多层框架结构在地震作用下的损伤演化过程进行了模拟分析。结果表明：采用混凝土单轴损伤模型与纤维模型相结合的方法可直观地给出钢筋混凝土框架结构的地震损伤演化全过程，方便设计人员识别结构的抗震薄弱部位，以采取有针对性的抗震加强措施。
[关键词] 钢筋混凝土；纤维单元；单轴损伤本构模型；地震损伤
中图分类号：TU313.3    文献标识码：A    文章编号：1002-848X(2012) Sl-0186-04

Development and application of uruaxial damage model for concrete based on ABAQUS
Li Zheng, Zhu Bingyin
( China Architecture Design&Research Group, Beijing 100044, China)

Abstract: The refined uniaxial La Borderie elastoplastic damage model for concrete and modified Menegotto-Pinto model by Sakai and Kawashima for rebar were implemented into general-purpose FEA software ABAQUS through the user material subroutine VUMAT. Then, the seismic damage analysis of a reinforced concrete( RC)  multi-storey frame structure was conducted based on the equivalent fiber model of beam-column element. The results show that the simulation method adopted in the present paper can capture the damage and failure process of the RC frame structures.  It is convenient for the designers to find the weak part of the frame structures and take the corresponding seismic measures.
Keywords: reinforced concrete; fiber element; uniaxial damage constitutive model; seismic damage