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（武漢大學土木建筑工程學院， 武漢 430072）
［摘要］基于《混凝土結(jié)構(gòu)設(shè)計規(guī)范》（GB 50010—2010）給出的單軸混凝土本構(gòu)關(guān)系，利用OpenSees軟件提供的二次開發(fā)平臺，編寫了相應的新材料ConcreteCC。針對該材料及OpenSees中自帶的二種典型的混凝土材料，分別在材料、構(gòu)件和結(jié)構(gòu)層次上進行了對比分析。結(jié)果表明：三種材料受壓骨架線基本一致，但其滯回規(guī)則存在明顯的區(qū)別；在構(gòu)件層次上，往復荷載作用下不同材料計算所得的滯回曲線區(qū)別并不明顯；在結(jié)構(gòu)層次上，底部剪力的計算結(jié)果比較接近，但在部分地震波作用下層間位移角的計算結(jié)果差別較大。
［關(guān)鍵詞］混凝土本構(gòu)關(guān)系； OpenSees； 二次開發(fā)； 滯回規(guī)則； 層間位移角
中圖分類號： TU352 文獻標識碼： A 文章編號： 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
作者簡介：胡曉斌，博士，副教授，Email:newhxb@126.com。
