（中国建筑股份有限公司技术中心，北京　101320）

［摘要］《混凝土结构设计规范》（GB 50010—2010）以损伤本构的形式给出了素混凝土单轴本构模型。通过用户材料子程序（UMAT）将规范混凝土单轴本构模型在ABAQUS中进行二次开发，将其骨架曲线与经典的Mander模型和过-张模型做比较，并研究其损伤发展规律。规范没有给出完整的滞回规则，如受拉卸载时的滞回规则及受压加载后卸载到受拉时的滞回规则。基于损伤理论对规范本构模型做了补充，使之包含所有的加载路径。

［关键词］混凝土结构; 设计规范; 单轴本构模型;  ABAQUS; 用户材料子程序

中图分类号：TU313      文献标识码：A      文章编号：1002-848X(2014)11-0094-03

Study on uniaxial constitutive model of concrete in Code for design of concrete structures and development in ABAQUS

Qi Hu, Li Yungui, Chen Xiaoming, Duan Jin, Sun Jianyun

 (China State Construction Technical Center, Beijing 101320, China)

Abstract: A damage uniaxial constitutive model of plain concrete is given in Code for design of concrete structures（GB 50010—2010）. The model was developed in ABAQUS via user-defined material mechanical behavior (UMAT) (user material). The compression skeleton curve of the model in the code was studied and compared with Mander model and Guo-Zhang model. The damage development of the model in the code was studied. The complete cycle curve is not deduced from the model in the code, such as the unloading hysteretic curve after tension loading and the tension hysteretic curve after compression unloading. Based on damage theory, the constitutive model in the code was supplemented to include all the loading path.

Keywords: concrete structure; design code; uniaxial constitutive model; ABAQUS; UMAT

作者简介：齐虎，博士，工程师，Email：qihu_810@163.com。

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