远场地震作用下钢管混凝土组合框架的地震反应分析
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摘要
为研究在远场地震动作用下钢管混凝土组合框架的反应,设计了某10层钢管混凝土组合框架,从PEER强震记录数据库中选取了28条远场(距离大于10km)强震地震动记录作为输入地震波,按美国地质勘探局(USGS)对场地类别分类方法将其分为A、B、C、D四类,基于OpenSees建立了非线性纤维梁柱单元的理论模型,对其进行了设防烈度为8度时多遇和罕遇地震作用下弹塑性时程分析,计算结果同时与Pushover分析结果进行了对比。结果表明:虽然不同地震动作用下钢管混凝土组合框架结构反应的离散性较大,但该类结构在不同场地类别下的反应仍具有一定规律性。与Pushover分析结果对比表明,对于该文中规则框架倒三角侧力分布模式比均布侧力更接近于钢管混凝土组合框架在地震作用下的地震力分布,可用在钢管混凝土框架结构的抗震分析中。
A typical 10-story composite frame with concrete filled steel tubular(CFST) columns was designed to study the seismic response under far-field ground motion.28 far-field(>10km) ground motion records in the strong motion database from the Pacific Earthquake Engineering Research(PEER) Center were used for the ground motion input.The sites were divided into four types,named A,B,C and D respectively,according with the classification of United States Geological Survey(USGS).The nonlinear fiber beam-column element was used to simulate the CFST columns and beams,respectively,and the elastic-plastic dynamic time history analysis was performed using OpenSees under meeting more and rare earthquakes of the seismic precautionary intensity in 8 degrees.The results were compared with that of pushover analysis.It is shown that the seismic response of the composite frame exhibits some regularity under different sites and ground motions though the results are discrete.The inverted triangle lateral load pattern is more similar to the result of dynamic time history analysis than the uniform distribution lateral load pattern for the regular composite frame structures,thusly the inverted triangle lateral load pattern should be used to the pushover analysis for the composite frame with CFST columns.
A typical 10-story composite frame with concrete filled steel tubular(CFST) columns was designed to study the seismic response under far-field ground motion.28 far-field(>10km) ground motion records in the strong motion database from the Pacific Earthquake Engineering Research(PEER) Center were used for the ground motion input.The sites were divided into four types,named A,B,C and D respectively,according with the classification of United States Geological Survey(USGS).The nonlinear fiber beam-column element was used to simulate the CFST columns and beams,respectively,and the elastic-plastic dynamic time history analysis was performed using OpenSees under meeting more and rare earthquakes of the seismic precautionary intensity in 8 degrees.The results were compared with that of pushover analysis.It is shown that the seismic response of the composite frame exhibits some regularity under different sites and ground motions though the results are discrete.The inverted triangle lateral load pattern is more similar to the result of dynamic time history analysis than the uniform distribution lateral load pattern for the regular composite frame structures,thusly the inverted triangle lateral load pattern should be used to the pushover analysis for the composite frame with CFST columns.
引文
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[2]黄襄云,周福霖.钢管混凝土结构地震模拟试验研究[J].西北建筑工程学院学报(自然科学版),2000,17(3):14―17.Huang Xiangyun,Zhou Fulin.Experimentalinvestigation on concrete filled steel tubular structure[J].Journal of Northwestern Institute of ArchitecturalEngineering(Science and Technology),2000,17(3):14―17.(in Chinese)
[3]童菊仙,徐礼华,凡红.钢管混凝土框架结构模型振动台试验研究[J].工程抗震与加固改造,2005,27(3):65―69.Tong Juxian,Xu Lihua,Fan Hong.Concrete filled squaresteel tubular frame model research on shaking table test[J].Earthquake Resistant Engineering and Retrofitting,2005,27(3):65―69.(in Chinese)
[4]许成祥,徐礼华,杜国锋,凡红.钢管混凝土柱框架结构模型地震反应试验研究[J].武汉大学学报(工学版),2006,39(3):68―72.Xu Chengxiang,Xu Lihua,Du Guofeng,Fan Hong.Experimental study on earthquake response of a CFSTcolumn frame structure model[J].Journal of WuhanUniversity(Engineering and Technology),2006,39(3):68―72.(in Chinese)
[5]Han Linhai,Li Wei,Yang Youfu.Seismic behaviour ofconcrete-filled steel tubular frame to RC shear wallhigh-rise mixed structures[J].Journal of ConstructionalSteel Research,2009,65(5):1249―1260.
[6]刘晶波,郭冰,刘阳冰.组合梁-方钢管混凝土柱框架结构抗震性能的pushover分析[J].地震工程与工程振动,2008,28(5):87―93.Liu Jingbo,Guo Bing,Liu Yangbing.Pushover analysisof seismic behavior of steel-concrete composite beamand concrete-filled rectangular tube frame structure[J].Journal of Earthquake Engineering and EngineeringVibration,2008,28(5):87―93.(in Chinese)
[7]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 mechanical performance of concrete filledsteel tubular frame structure[J].Journal of BuildingStructures,2008,29(6):75―83.(in Chinese)
[8]王文达,韩林海.钢管混凝土框架实用荷载-位移恢复力模型研究[J].工程力学,2008,25(11):62―69.Wang Wenda,Han Linhai.Research on practicalresilience model of load versus displacement for concretefilled steel tubular frame[J].Engineering Mechanics,2008,25(11):62―69.(in Chinese)
[9]Han Linhai,Wang Wenda,Zhao Xiaoling.Behaviour ofsteel beam to concrete-filled SHS column frames:finiteelement model and verifications[J].EngineeringStructures,2008,30(6):1647―1658.
[10]Wang Wenda,Han Linhai,Zhao Xiaoling.Analyticalbehaviour of frames with steel beam to concrete-filledsteel tubular column[J].Journal of Construction of SteelResearch,2009,65(3):497―508.
[11]王文达,韩林海.钢管混凝土框架力学性能的简化二阶弹塑性分析[J].清华大学学报(自然科学版),2009,49(9):1455―1458.Wang Wenda,Han Linhai.Simplified second-orderelastic analyses on mechanics behavior of concrete filledsteel tubular frame[J].Journal of Tsinghua University(Science and Technology),2009,49(9):1455―1458.(inChinese)
[12]王文达,韩林海.钢管混凝土柱-钢梁平面框架的滞回关系[J].清华大学学报(自然科学版),2009,49(12):1934―1938.Wang Wenda,Han Linhai.Hysteresis relationship inconcrete filled steel tubular columns and steel beamplanar frames[J].Journal of Tsinghua University(Science and Technology),2009,49(12):1934―1938.(in Chinese)
[13]刘晶波,刘阳冰,郭冰,杨建国.钢-混凝土组合框架结构体系抗震性能参数分析[J].工业建筑,2009,39(8):96―100.Liu Jingbo,Liu Yangbing,Guo Bing,Yang Jianguo.Parameter analysis of seismic behavior of steel-concretecomposite frame structures[J].Industrial Construction,2009,39(8):96―100.(in Chinese)
[14]GB50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011-2010,Code for seismic design of buildings[S].Beijing:China Architecture Industry Press,2010.(inChinese)
[15]CECS230:2008,高层建筑钢-混凝土混合结构设计规程[S].北京:中国计划出版社,2008.CECS 230:2008,Specification for design ofsteel-concrete mixed structure of tall buildings[S].Beijing:China Planning Press,2008.(in Chinese)
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