钢管混凝土柱-钢梁平面框架的滞回关系
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摘要
为研究钢管混凝土框架抗震性能,进行了钢管混凝土柱-钢梁平面框架往复加载时荷载-位移滞回关系的计算。考虑了材料和几何非线性,基于非线性纤维梁-柱单元理论,在OpenSees求解平台上,建立了数值计算模型。核心混凝土的应力-应变关系考虑了钢管约束效应;钢材的应力-应变关系采用双线性强化模型。结果表明:在钢材强度为235~420MPa、混凝土强度为30~90MPa范围内,理论计算结果和试验结果吻合较好。
The hysteresis relationship in concrete-filled steel tubular(CFST) frames during seismic loads was analyzed for composite frames having CFST columns and H-shape steel beams.The model was based on fiber nonlinear beam-column element theory and the OpenSees Software,nonlinear material and geometric conditions to simulate the hysteresis to the reverse lateral loading versus the lateral displacement.The stress-strain relationship of the confined core concrete was considered,with a bilinear stress-strain model with strain hardening for the steel.The numerical results agree well with experimental results with steel yield strength of 235-420 MPa and concrete cube compression strength of 30-90 MPa.
The hysteresis relationship in concrete-filled steel tubular(CFST) frames during seismic loads was analyzed for composite frames having CFST columns and H-shape steel beams.The model was based on fiber nonlinear beam-column element theory and the OpenSees Software,nonlinear material and geometric conditions to simulate the hysteresis to the reverse lateral loading versus the lateral displacement.The stress-strain relationship of the confined core concrete was considered,with a bilinear stress-strain model with strain hardening for the steel.The numerical results agree well with experimental results with steel yield strength of 235-420 MPa and concrete cube compression strength of 30-90 MPa.
引文
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[8]王文达,韩林海,陶忠.钢管混凝土柱-钢梁平面框架抗震性能的试验研究[J].建筑结构学报,2006,27(3):48-58.WANG Wenda,HAN Linhai,TAO Zhong.Experimentalresearch on seismic behaviour of concrete-filled CHS and SHScolumns and steel beam planar frames[J].J BuildingStruct,2006,27(3):48-58.(in Chinese)
[2]王文达,韩林海.钢管混凝土框架力学性能的非线性有限元分析[J].建筑结构学报,2008,29(6):75-83.WANG Wenda,HAN Linhai.Nonlinear finite elementanalysis on mechanics performance of concrete filled steeltubular frame[J].J Building Struct,2008,29(6):75-83.(in Chinese)
[3]HAN Linhai,WANG Wenda,ZHAO Xiaoling.Behaviour ofsteel beam to concrete-filled SHS column frames:Finiteelement model and verifications[J].Eng Struct,2008,30(6):1647-1658.
[4]Mazzoni S,McKenna F,Fenves G L,et al.Open system forearthquake engineering simulation user manual(Ver.1.7.0)[R].Pacific Earthquake Engineering Research Center(PEER),University of California,Berkeley,2006.
[5]韩林海.钢管混凝土结构——理论与实践[M].第2版.北京:科学出版社,2007.HAN Linhai.Concrete-Filled Steel Tubular Structures:Theory and Application[M].2nd ed.Beijing:SciencePress,2007.(in Chinese)
[6]Kawaguchi J,Morino S,Sugimoto T.Elasto-plasticbehavior of concrete-filled steel tubular frames[C]//ProcEng Foundation Conf on Steel and Concrete CompositeConstruction III,ASCE.New York,USA,1997:272-281.
[7]李斌,薛刚,张园.钢管混凝土框架结构抗震性能试验研究[J].地震工程与工程振动,2002,22(5):53-56.LI Bin,XUE Gang,ZHANG Yuan.Experimental study onbehaviors of concrete filled steel tubular frame[J].EarthquakeEng and Eng Vibration,2002,22(5):53-56.(in Chinese)
[8]王文达,韩林海,陶忠.钢管混凝土柱-钢梁平面框架抗震性能的试验研究[J].建筑结构学报,2006,27(3):48-58.WANG Wenda,HAN Linhai,TAO Zhong.Experimentalresearch on seismic behaviour of concrete-filled CHS and SHScolumns and steel beam planar frames[J].J BuildingStruct,2006,27(3):48-58.(in Chinese)
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