复杂双塔连体高层结构动力特性与弹性时程分析
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摘要
法门寺合十舍利塔高147m,外形呈双手合十造型,为复杂双塔连体超限的钢与混凝土混合结构。应用大型通用有限元软件,建立与实际情况相符的结构模型,对该结构进行动力特性分析。针对结构的复杂性,利用时程分析法对结构进行弹性分析。考虑这些影响因素,系统分析地震波输入维数、地震波类型及阻尼比对该结构时程分析的影响。根据分析结果提出对合十舍利塔等复杂结构进行抗震分析时,应考虑三维地震波输入。分析表明,该结构在7度多遇烈度地震作用下,有较小的位移,能够满足我国现行抗震规范的抗震设计标准。从整体上对结构的抗震性能做出评估,并得出具体的结论。
The heshi dagoba in Famen temple,147m high,the exterior of the dagoba likes two palms together,and the building is a kind of connected twin-tower withcomplex high-rising steel-concrete hybrid structure.Structure model similar to practice was established using commercial finite element software.The dynamic characteristics of the structure were analyzed.For the complexity of the structure,using time-history analysis to analyze the elasticity of the structure.The result of time-history analysis may be influenced by several parameters,so the influence of earthquake wave dimension,the style and damping ratio were analyzed.The analysis results provide some suggestions: For the seismic analysis,three-dimensional seismic wave inputted should be considered.Under 7 degree seismic fortification intensity,displacement of the structure is smaller,which meet the seismic design standards of Chinese current building code.Some specific conclusions are gained from the overall seismic performance of the structure.
The heshi dagoba in Famen temple,147m high,the exterior of the dagoba likes two palms together,and the building is a kind of connected twin-tower withcomplex high-rising steel-concrete hybrid structure.Structure model similar to practice was established using commercial finite element software.The dynamic characteristics of the structure were analyzed.For the complexity of the structure,using time-history analysis to analyze the elasticity of the structure.The result of time-history analysis may be influenced by several parameters,so the influence of earthquake wave dimension,the style and damping ratio were analyzed.The analysis results provide some suggestions: For the seismic analysis,three-dimensional seismic wave inputted should be considered.Under 7 degree seismic fortification intensity,displacement of the structure is smaller,which meet the seismic design standards of Chinese current building code.Some specific conclusions are gained from the overall seismic performance of the structure.
引文
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[5]董攀.复杂双塔连体高层结构地震反应分析[D.]西安:西安建筑科技大学,2010(Dong Pan.Seismic responseanalysis of the complicated two-tower connection high-risebuilding structure[D.]Xia’n:Xi’an University of Architectureand Technology,2010(in Chinese))
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[7]Fan Hong,Li Q S,Tuan A Y,et al.Seismic analysis ofthe world’s tallest building[J.]Journal of ConstructionalSteel Research,2009,65(5):1206-1215
[8]杨溥,赖明.结构时程分析法输入地震波的选择控制指标[J.]土木工程学报,2000,33(6):33-37(Yang Pu,Lai Ming.A new method for selecting imputing waves forhistory analysis[J.]China Civil Engineering Journal,2000,33(6):33-37(in Chinese))
[9]王选民,邹银生.复杂高层建筑结构地震作用的计算[J.]建筑结构学报,1998,19(2):60-66(Wang Xuanmin,ZouYinsheng.Computation of complex high-rise buildingstructures under earthquake action[J].Journal of BuildingStructures,1998,19(2):60-66(in Chinese))
[10]李田,吴学敏.高层及复杂结构多维时程弹塑性动力分析[J.]建筑结构学报,1992,13(6):2-10(Li Tian,WuXuemin.Elastic-plastic dynamic analysis of multistory andcomplex structures at multi-dimensional ground accelerations[J.]Journal of Building Structures,1992,13(6):2-10(inChinese))
[11]陈麟,张耀春,邓雪松.巨型钢结构[M.]北京:科学出版社,2007
[12]Whittaker A,Constantinou M,Tsopelas P.Displacementestimates for performance-based seismic design[J].Journal of Structural Engineering,1998,124(8):905-912
[13]Suck S.Structural reliability and seismic performance ofreinforced concrete building in the performance-baseddesign[D.]Los Angeles:University of California,2001
[14]李刚,程耿东.基于性能的结构抗震设计—理论、方法与应用[M.]北京:科学出版社,2004
[15]Clough C W,Penzien J.Dynamics of structures[M.]SecondEdition.New York:McGram-Hill,Inc.,1993
[16]钱稼茹,吕文,方鄂华.基于位移延性的剪力墙抗震设计[J.]建筑结构学报,1999,20(3):42-49(Qian Jiaru,Lu Wen,Fang Ehua.Shear-walls design based ondisplacement ductility[J.]Journal of Building Structures,1999,20(3):42-49(in Chinese))
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