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    李  正，  朱炳寅
    （中國建筑設(shè)計(jì)研究院，北京 100044）

[摘要] 以大型通用有限元軟件ABAQUS為分析平臺，將混凝土精細(xì)化的La Borderie彈塑性損傷模型與鋼筋由Sakai與Kawashima修正的Menegotto-Pinto模型，通過軟件提供的用戶材料子程序二次開發(fā)接口VUMAT嵌入到ABAQUS中。基于纖維梁柱單元的等效模擬方法，對一鋼筋混凝土多層框架結(jié)構(gòu)在地震作用下的損傷演化過程進(jìn)行了模擬分析。結(jié)果表明：采用混凝土單軸損傷模型與纖維模型相結(jié)合的方法可直觀地給出鋼筋混凝土框架結(jié)構(gòu)的地震損傷演化全過程，方便設(shè)計(jì)人員識別結(jié)構(gòu)的抗震薄弱部位，以采取有針對性的抗震加強(qiáng)措施。
[關(guān)鍵詞] 鋼筋混凝土；纖維單元；單軸損傷本構(gòu)模型；地震損傷
中圖分類號：TU313.3    文獻(xiàn)標(biāo)識碼：A    文章編號：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