同东东1'2，  潘  鹏1，  万金国1,2，  李文峰2，  苗启松2
（1清华大学土木工程系，北京100084; 2北京市建筑设计研究院有限公司，北京100045）

[摘要] 对采用不同钢筋和混凝土单轴本构模型的钢筋混凝土框架结构在罕遇地震作用下的动力弹塑性分析结果进行了比较研究。基于ABAQUS中的纤维梁单元模型，采用不同钢筋和混凝土材料单轴本构关系，对罕遇地震作用下某超限钢筋混凝土框架结构进行了动力弹塑性时程分析，并对分析结果进行了比较。分析结果表明，基于不同材料本构得到的结构时程响应差别不大，材料单轴本构的选择对框架结构弹塑性时程分析结果无重大影响，其中将Opensees中的Concrete02和Stee102单轴本构组合时计算速度最快。
[关键词] 罕遇地震；动力弹塑性分析；纤维梁单元；材料单轴本构
中图分类号：TU311.3, TU375.4    文献标识码：A  文章编号：1002-848X(2012) S2-0176-05

Comparative study on elastic-plastic dynamic analysis of aframe structure based on different material constitutive models
Ge Dongdong1'2,Pan Peng2,  Wan Jinguo1'2,  Li Wenfeng1,  Miao Qisong1
(1 Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2 Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract: By means of different steel and concrete uniaxial constitutive models, a comparative research of the elastic-plastic dynamic analysis of reinforced concrete frame structure subjected to earthquake is camed out. On the basis of fiber beam element modelin ABAQUS, different steel and concrete uniaxial constitutive models are used in the dynamic elastic-plastic time history analysis of an overrun reinforced concrete frame structure under rare earthquake. The analysis results from different material models are compared with each other in detail. The results demonstrate that the time history dynamic response of structure has little difference, even if the steel and concrete uniaxial constitutive models are different. There is no significant influence on results of the time history dynamic response due to the choice of uniaxial constitutive models of steel and concrete. The uniaxial constitutive model of concrete named Concrete02 and of steel named Stee102 in Opensees are combined can obtain the highest computational speed.
Keywords: rare earthquake; elastic-plastic dynamic analysis; fiber beam element model; uniaxial constitutive models of material