（武汉大学土木建筑工程学院， 武汉 430072）

［摘要］基于《混凝土结构设计规范》（GB 50010—2010）给出的单轴混凝土本构关系，利用OpenSees软件提供的二次开发平台，编写了相应的新材料ConcreteCC。针对该材料及OpenSees中自带的二种典型的混凝土材料，分别在材料、构件和结构层次上进行了对比分析。结果表明：三种材料受压骨架线基本一致，但其滞回规则存在明显的区别；在构件层次上，往复荷载作用下不同材料计算所得的滞回曲线区别并不明显；在结构层次上，底部剪力的计算结果比较接近，但在部分地震波作用下层间位移角的计算结果差别较大。

［关键词］混凝土本构关系； OpenSees； 二次开发； 滞回规则； 层间位移角

中图分类号： TU352    文献标识码： A    文章编号： 1002-848X(2015)S2-0430-06

Comparisons between different constitutive relations of concrete based on OpenSees

Hu Xiaobin, Wang Qi, Hao Tong, Jiang Weibo

(School of Civil Engineering, Wuhan University, Wuhan 430072, China)

Abstract: According to the uniaxial constitutive relation of concrete provided in Code for design of concrete structure (GB 50010—2010), a new material named ConcreteCC was developed on the secondary development platform of OpenSees. Comparisons were made among the ConcreteCC and two typical concrete materials on the material, component and structure levels respectively. The results show that the compressive skeleton curves of constitutive relation for the three materials are almost the same although obvious differences exist in the hysteretic rules. However, hysteretic curves of a reinforced concrete column subjected to cyclic loading computed using the three material approach well with each other. On the structural level, the base shear forces calculated using the three materials are close, but the story drift ratios under some earthquake records have relatively larger difference.

Keywords: concrete constitutive relation; OpenSees; secondary development; hysteresis rule; story drift ratio

作者简介：胡晓斌，博士，副教授，Email:newhxb@126.com。