钢-混凝土组合框架-RC核心筒结构弹塑性地震反应分析
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摘要
外部为钢-混凝土组合框架,内部为钢筋混凝土核心筒的组合框架-核心筒结构体系近年来在中国高层建筑结构中得到了广泛的应用,但是目前对其抗震性能研究较少。对钢-混凝土组合框架-RC核心筒结构的抗震性能进行了弹塑性地震反应分析。建立了钢-混凝土组合框架-RC核心筒结构的弹塑性分析模型,并通过与弹性模型模态分析和振型分解反应谱法计算结果的对比,验证了模型的正确性。探讨了组合框架-核心筒结构的地震破坏模式、分析了结构变形和外框架剪力随地震作用增大的变化规律,可为结构的设计提供参考。对比了Pushover分析方法和弹塑性时程方法计算结果的差别,初步讨论了Pushover方法的适用性。
The composite frame-core tube structural system with the outer of composite frame and the inner of RC core tube has been widely used in high-rise buildings.Elasto-plastic seismic response analysis of composite frame-RC core tube structures was performed.Firstly,the elasto-plastic analysis model of the composite-RC core tube was constructed.By comparing the results of the mode analysis and the mode response spectrum method,the precision of the model was verified.Then the seismic damage model and the variation law of deformation and frame shear force with the increasing of the earthquake action were probed into.The results can be helpful to practical seismic design for composite frame-RC core tube structures.At last,the results of pushover analysis and elastic-plastic time history analysis were compared.And the applicability of pushover analysis method was discussed.
The composite frame-core tube structural system with the outer of composite frame and the inner of RC core tube has been widely used in high-rise buildings.Elasto-plastic seismic response analysis of composite frame-RC core tube structures was performed.Firstly,the elasto-plastic analysis model of the composite-RC core tube was constructed.By comparing the results of the mode analysis and the mode response spectrum method,the precision of the model was verified.Then the seismic damage model and the variation law of deformation and frame shear force with the increasing of the earthquake action were probed into.The results can be helpful to practical seismic design for composite frame-RC core tube structures.At last,the results of pushover analysis and elastic-plastic time history analysis were compared.And the applicability of pushover analysis method was discussed.
引文
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[2]Liu Jingbo,Liu Yangbing,Guo Bing.Seismic behavior analy-sis of steel-concrete composite frame structure system[J].Journal of Beijing University of Technology,2010,36(7):934-941.[刘晶波,刘阳冰,郭冰.钢-混凝土组合框架结构体系抗震性能研究[J].北京工业大学学报,2010,36(7):934-941.]
[3]Han Linhai,Li Wei,Yang Youfu.Seismic behaviour of con-crete-filled steel tubular frame to RC shear wall high-risemixed structures[J].Journal of Constructional Steel Re-search,2009,65(5):1249-1260.
[4]Hou Guangyu,Chen Binlei,Miao Qisong,et al.Design andresearch on composite steel and concrete frame-core wallstructure[J].Journal of Building Structures,2006,27(2):1-9.[侯光瑜,陈彬磊,苗启松,等.钢-混凝土组合框架-核心筒结构设计研究[J].建筑结构学报,2006,27(2):1-9.]
[5]Gregory G,Noguchi H.Overview of U.S-Japan reaearch onthe seismic design of composite reinforced concrete and steelmoment frame structures[J].Journal of Structural Engineer-ing,2004,130(2):361-367.
[6]Wallace J,Wada A.Hybrid wall systems:U.S-Japan re-search[C]//Proc of 12th World Conference on EarthquakeEngineering.New Zealand,2000.
[7]Chopra A K,Goel A K.A modal pushover analysis procedureto estimate seismic demands for buildings:theory and pre-liminary evaluation[R].Report No.Peer-2001/03.Berke-ley:Pacific Earthquake Engineering Research Center,Uni-versity of California,Berkeley,1999.
[8]包世华,方鄂华.高层建筑结构设计[M].北京:清华大学出版社,2004.
[9]Wei Yong,Qian Jiaru.Nonlinear time-history analysis of iso-lated shear walls using SAP2000[J].Journal of Tsinghua U-niversity:Science and Technology,2005,45(6):740-744.[魏勇,钱稼茹.应用SAP2000程序进行剪力墙非线性时程分析[J].清华大学学报:自然科学版,2005,45(6):740-744.]
[10]JGJ3—2002高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2002.
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