刘  康1，  洪嵩然2
(1中国建筑股份有限公司技术中心，北京101300；2中国建筑东北设计研究院有限公司，沈阳110001)

[摘要] 根据《混凝土结构设计规范》( GB 50010-2010)附录C建议的钢筋和混凝土本构关系模型，应用通用有限元软件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《混凝土结构设计规范》附录C建议的钢筋、混凝土的本构关系模型和本文的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；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(2012) S2-0181-05

Development and application of constitutive relations for steel and concrete recommended by Code for design of concrete structures-appendix C in elastic-plastic analysis of structures
 Liu Kang1, Hong Songran2
(1 China State Construction Engineering Corp.  Ltd. Technical Center, Beijing 101300, China; 2 China Northeast Architectural Design Research Institute Co.,  Ltd.,  Shenyang 110001,  China)

Abstract: Using constitutive relations for steel and concrete recommended by Code for design of concrete structures( GB 50010-2010)-appendix C, the author developed a user-defined material subroutine for fiber beam elements that is incorporated in subprogram VUMAT provided by ABAQUS.  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. Comparisons between FEM results and test data indicated that constitutive relations for steel and concrete recommended by Code for design of concrete structures-appendix C combined with the analysis method developed can possess good accuracy in elastic-plastic analysis of structures.
Keywords: concrete; constitutive relation; FEM; elastic-plastic analysis