巨型结构自振特性的影响因素分析
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摘要
巨型结构体系是适应超高层建筑发展趋势和特点的新型结构体系,该文选取上海环球金融中心大厦为研究对象,该结构采用巨型框架结构、钢筋混凝土筒结构和伸臂钢桁架组成的三重结构体系抵抗水平荷载,进行了整体结构模型的振动台试验,并利用有限元软件ANSYS进行了自振特性分析,理论分析与试验结果进行了验证,探明了该巨型结构体系的动力特性和主要影响因素,可供工程设计人员在结构选型和方案设计时参考。
Mega-structure is a new kind of structural system for high-rise buildings. The main advantage of mega-structure is high capacity to resist lateral loads. Shanghai World Financial Center Tower is selected in the paper to study the features of Mega-structure. The lateral loads are resisted by a system containing mega-frame, reinforced concrete core and outrigger trusses. Shaking table model test is taken and a 3-D finite element analysis is carried out using ANSYS. The study demonstrates some dynamic characteristics of the mega-structure and some influencing factors, which might be useful for structural system selection.
Mega-structure is a new kind of structural system for high-rise buildings. The main advantage of mega-structure is high capacity to resist lateral loads. Shanghai World Financial Center Tower is selected in the paper to study the features of Mega-structure. The lateral loads are resisted by a system containing mega-frame, reinforced concrete core and outrigger trusses. Shaking table model test is taken and a 3-D finite element analysis is carried out using ANSYS. The study demonstrates some dynamic characteristics of the mega-structure and some influencing factors, which might be useful for structural system selection.
引文
[1]JGJ3-2002,高层建筑混凝土结构技术规程[S].2002.JGJ3-2002,Technical specifications for concrete structures of tall building[S].2002.(in Chinese)
[2]GB50011-2001,建筑抗震设计规范[S].2001.GB50011-2001,Code for seismic design of Buildings[S].2001.(in Chinese)
[3]Xilin Lu,Qiang Zhou.Dynamic analysis method of a combined energy dissipation system and its experimental verification[J].Earthquake Engineering&Structural Dynamics,2002,31(6):1251―1265.
[4]Bertero R D,Bertero V V.Performance-based seismic Engineering:the need for a reliable conceptual comprehensive approach[J].Earthquake Engineering and Structural Dynamics,2002,31:627―652.
[5]Lu X L,Zhang H Y,Hu Z L,Lu W S.Shaking table testing of a U-shaped plan building model[J].Canadian Journal of Civil Engineering,1999,26:746―759.
[6]吕西林,邹昀.上海环球金融中心大厦结构模型振动台抗震试验[J].地震工程与工程振动,2004,24(3):57―63.Lu Xilin,Zou Yun.Experimental study on Shanghai world financial center[J].Earthquake Engineeing&Engineeing Vibration,2004,24:57―63.(in Chinese)
[7]Lu Xilin,Zou Yun,Lu Wensheng,Zhao Bin.Shaking table model test on Shanghai World Financial Center Tower[J].Earthquake Engineering&Structural Dynamics,2006,36(4):439―457.
[8]邹昀,吕西林,钱江.上海环球金融中心大厦抗震性能研究[J].建筑结构学报,2006,27(6):74―80.Zou Yun,Lu Xilin,Qian Jiang.Study on seismic behavior of Shanghai world financial center tower[J].Journal of Building Structures,2006,27(6):74―80.(in Chinese)
[9]邹昀,吕西林,朱杰江.基于性能的抗震设计方法在某复杂超高层结构中的应用研究[J].工程力学,2008,25(9):93―99.Zou Yun,Lu Xilin,Zhu Jiejiang.Application study of performance-based seismic design to a complicated high rise building structure[J].Engineering Mechanics,2008,25(9):93―99.(in Chinese)
[10]邹昀.上海环球金融中心大厦基于性能的抗震设计研究[D].上海:同济大学,2006.Zou Yun.Performance-based seismic design of Shanghai world financial center[D].Shanghai:Tongji University,2006.(in Chinese)
[2]GB50011-2001,建筑抗震设计规范[S].2001.GB50011-2001,Code for seismic design of Buildings[S].2001.(in Chinese)
[3]Xilin Lu,Qiang Zhou.Dynamic analysis method of a combined energy dissipation system and its experimental verification[J].Earthquake Engineering&Structural Dynamics,2002,31(6):1251―1265.
[4]Bertero R D,Bertero V V.Performance-based seismic Engineering:the need for a reliable conceptual comprehensive approach[J].Earthquake Engineering and Structural Dynamics,2002,31:627―652.
[5]Lu X L,Zhang H Y,Hu Z L,Lu W S.Shaking table testing of a U-shaped plan building model[J].Canadian Journal of Civil Engineering,1999,26:746―759.
[6]吕西林,邹昀.上海环球金融中心大厦结构模型振动台抗震试验[J].地震工程与工程振动,2004,24(3):57―63.Lu Xilin,Zou Yun.Experimental study on Shanghai world financial center[J].Earthquake Engineeing&Engineeing Vibration,2004,24:57―63.(in Chinese)
[7]Lu Xilin,Zou Yun,Lu Wensheng,Zhao Bin.Shaking table model test on Shanghai World Financial Center Tower[J].Earthquake Engineering&Structural Dynamics,2006,36(4):439―457.
[8]邹昀,吕西林,钱江.上海环球金融中心大厦抗震性能研究[J].建筑结构学报,2006,27(6):74―80.Zou Yun,Lu Xilin,Qian Jiang.Study on seismic behavior of Shanghai world financial center tower[J].Journal of Building Structures,2006,27(6):74―80.(in Chinese)
[9]邹昀,吕西林,朱杰江.基于性能的抗震设计方法在某复杂超高层结构中的应用研究[J].工程力学,2008,25(9):93―99.Zou Yun,Lu Xilin,Zhu Jiejiang.Application study of performance-based seismic design to a complicated high rise building structure[J].Engineering Mechanics,2008,25(9):93―99.(in Chinese)
[10]邹昀.上海环球金融中心大厦基于性能的抗震设计研究[D].上海:同济大学,2006.Zou Yun.Performance-based seismic design of Shanghai world financial center[D].Shanghai:Tongji University,2006.(in Chinese)
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