（中国建筑股份有限公司技术中心，北京 101300）

[摘要]  本文通过有限元软件ABAQUS提供的VUMAT用户子程序功能，针对纤维梁单元的混凝土和钢筋单轴材料本构关系模型进行了二次开发；并结合清华大学公开的两根钢筋混凝土独立柱和一榀钢筋混凝土框架在往复荷载作用下的推覆试验数据，建立了有限元模型，通过有限元分析和试验结果的对比，验证了本文开发应用的本构模型和分析方法在结构弹塑性分析应用中的精确性。

[关键词]  混凝土;塑性损伤;本构关系;有限元;弹塑性分析

中图分类号：TU311.41             文献标识码：A          文章编号：1002-848X(2013)S1-1171-05

作者简介：刘康，博士，工程师，Email:liukang@cscec.com。卢海陆，硕士，Email:luhailu@cscec.com。

Development and application of plastic-damage model for concrete in elastic-plastic analysis of structures

Liu Kang,      Lu Hailu

(China State Construction Engineering Corp. Ltd. Technical Center, Beijing 101300, China)

Abstract: Using the subprogram VUMAT provided by ABAQUS, the author developed a user-defined material subroutine for concrete and steel based on fiber beam elements. FE models for numerical simulation of two single RC columns and one RC frame structure under cyclical pull-down loading conducted at Tsinghua University were developed in this paper. Comparisons between FEM results and test data indicated that constitutive models and the analysis method applied in this paper can possess good accuracy in elastic-plastic analysis of structures.

Keywords: concrete; plastic-damage; constitutive relation; elastic-plastic analysis