考虑地震动输入方向的大跨度高支承网架结构水平双向地震响应分析
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摘要
近年来,随着经济的快速发展,为了追求建筑效果,大跨空间结构得到广泛的应用,平面布置不规则的情况占大多数。目前针对大跨空间结构地震响应分析中,地震动的输入方向一般只以两个坐标轴为输入方向,对于结构体型复杂、扭转效应明显的结构,地震动的输入角度对结构的地震响应将产生很大的影响。本文以某待建三边支承的大跨度高支承飞艇库为研究对象,利用SAP2000有限元分析软件,分别采用反应谱法和弹性时程分析方法,研究了其在不同输入角度下水平双向地震响应。结果表明,采用反应谱分析时,随着输入角度增加,结构的地震响应呈增加趋势,但是幅度不大;采用弹性时程分析方法时,结构的地震响应随输入角度的增加增幅较大。因此,有必要在抗震分析与设计中考虑不同输入角度的影响。
In recent years,with the rapid development of economy,the new long-span space structure were built in order to pursue the construction effect,and the irregular layout situations is also majority.At present,for seismic response analysis of long span structure,the input direction of ground motion is generally along the two axes.For the structure which have complex shape and clear reverse effects,the input angle of ground motion will produce greatly effect to the seismic response.In this paper,take a long span-high supported airship shed to be built as the study example,the software of SAP2000 is used,the mode-superposition response spectrum method analysis and elastic time history analysis are carried out respectively to study the earthquake response under two-way horizontal earthquake with different input angle.The results show that: when using the mode-superposition response spectrum analysis,with the input angle increased,the seismic response is increased,but amplitude is little;when using the elastic time-history analysis method,the seismic response increased largely with the input angle increased.Therefore,it is necessary to consider the different input angles in seismic analysis and design.
In recent years,with the rapid development of economy,the new long-span space structure were built in order to pursue the construction effect,and the irregular layout situations is also majority.At present,for seismic response analysis of long span structure,the input direction of ground motion is generally along the two axes.For the structure which have complex shape and clear reverse effects,the input angle of ground motion will produce greatly effect to the seismic response.In this paper,take a long span-high supported airship shed to be built as the study example,the software of SAP2000 is used,the mode-superposition response spectrum method analysis and elastic time history analysis are carried out respectively to study the earthquake response under two-way horizontal earthquake with different input angle.The results show that: when using the mode-superposition response spectrum analysis,with the input angle increased,the seismic response is increased,but amplitude is little;when using the elastic time-history analysis method,the seismic response increased largely with the input angle increased.Therefore,it is necessary to consider the different input angles in seismic analysis and design.
引文
[1]冯云田,李明瑞.复杂结构的弹性地震反应分析[J].地震工程与工程振动,1991,11(1):78～87 Feng Yun-tian,Li Ming-rui.Elastic Earthquake Analysis of Complicated Structure[J].Earthquake Engineering and Engineering Vibration,1991,11(1):78～87(in Chinese)
[2]聂利英,李建中,范立础.复杂结构地震动输入方向的基本原理及其影响[J].地震工程与工程振动,2003,23(3):30～35 Nie Li-ying,Li Jian-zhong,Fan Li-chu.Principle and Effect of Critical Angle of Complicated Structure in Dynamic Analysis[J].Earthquake Engineering and Engineering Vibration,2003,23(3):30～35(in Chinese)
[3]范立础,聂利英,李建中.复杂结构地震波输入最不利方向标准问题[J].同济大学学报,2003,31(6):631～637 Fan Li-chu,Nie Li-ying,Li Jian-zhong.Discussion on Standard of Critical Angle of Seismic Wave in Seismic Analysis of Complicated Structure[J].Journal of Tongji University,2003,31(6):632～637(in Chinese)
[4]Wilson E L and Button M.Three-dimensional Dynamic Analysis for Multi-component Earthquake Spectra[J].Earthquake Engng.Struct.Dyn,1982,10:471～476
[5]Smeby W and Der Kiureghian A.Modal Combinations Rules for Multi-component Earthquake Excitation[J].Earthquake Engng.Struct.Dyn,1985,13:1～12
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[9]Lopez O A,Chopra A K,Hernandez J J.Critical Response of Structures to Multi-component Earthquake Excitation[J].Earthq.Eng.Struct.Dyn.,2000,29(17):1759-1778
[10]Lopez O A,Chopra A K,Hernandez J J.Evaluation of Combination Rules for Maximum Response Calculation in Multi-component Seismic Analysis[J].Earthq.Eng.Struct.Dyn.,2001,30(13):1379-1398
[11]Menun C,Der Kiureghian A.Envelopes for Seismic Response Vectors.II:Application[J].J.Struct.Eng.,2000,(126):474-81
[12]Penzien J,Watabe M.Characteristics of3-D Earthquake Ground Motions[J].Earthq.Eng.Struct.Dyn.,1975,(3):365-373
[13]Anastassiadis K,Avramidis I,Panetsos P.Concurrent Design Forces in Structures Under Three-component Orthotropic Seismic Excitation[J].Earthquake Spectra,2002,(18):1-17
[14]Athanatopoulou A M.Critical Orientation of Three Correlated Seismic Components[J].Engineering Structures,2005(27):301-312
[15]王滔,郭恩栋,张丽娜.大跨斜拉桥地震动最不利输入方向分析[J].世界地震工程,2007,23(4):107～112 Wang Tao,Guo En-dong,Zhang Li-na.The Critical Direction of Earthquake Input for Dynamic Analysis of a Long Span Cable Stayed Bridge[J].World Earthquake Engineering,2007 23(4):107～112(in Chinese)
[16]朱东生,虞庐松,刘世忠.不规则桥梁地震动输入主方向的研究[J].兰州铁道学院学报(自然科学版),2000,19(6):37～41 Zhu Dong-sheng,Yu Lu-song,Liu Shi-zhong.The Study of Earthquake Input Principal Direction for Irregular Bridges[J].Journal of Lanzhou Railway University(Natural Sciences),2000,19(6):37～41(in Chinese)
[17]GB 50011-2010,建筑抗震设计规范[S]GB 50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
[18]美国加州大学伯克利分校强震数据库[DB/OL].http://peer.berkeley.edu/,PEER Strong Motion Database of the University of California
[2]聂利英,李建中,范立础.复杂结构地震动输入方向的基本原理及其影响[J].地震工程与工程振动,2003,23(3):30～35 Nie Li-ying,Li Jian-zhong,Fan Li-chu.Principle and Effect of Critical Angle of Complicated Structure in Dynamic Analysis[J].Earthquake Engineering and Engineering Vibration,2003,23(3):30～35(in Chinese)
[3]范立础,聂利英,李建中.复杂结构地震波输入最不利方向标准问题[J].同济大学学报,2003,31(6):631～637 Fan Li-chu,Nie Li-ying,Li Jian-zhong.Discussion on Standard of Critical Angle of Seismic Wave in Seismic Analysis of Complicated Structure[J].Journal of Tongji University,2003,31(6):632～637(in Chinese)
[4]Wilson E L and Button M.Three-dimensional Dynamic Analysis for Multi-component Earthquake Spectra[J].Earthquake Engng.Struct.Dyn,1982,10:471～476
[5]Smeby W and Der Kiureghian A.Modal Combinations Rules for Multi-component Earthquake Excitation[J].Earthquake Engng.Struct.Dyn,1985,13:1～12
[6]Gonzalez P.Considering Earthquake Direction on Seismic Analysis[A].Earthquake Engineering Proc.10th World Conf.Earth.Eng.[C].Madrid,Spain,VII,1992,3809～3813
[7]Lopez O A,Torres R.The Critical Angle of Seismic Incidence and the Maximum Structural Response[J].Earthq.Eng.Struct.Dyn.,1997,26:881-894
[8]Menun C,Der Kiureghian A.A Replacement for the 30%,40%and SRSS Rules for Multi-component Seismic Analysis[J].Earthquake Spectra,1998,14(11):53-63
[9]Lopez O A,Chopra A K,Hernandez J J.Critical Response of Structures to Multi-component Earthquake Excitation[J].Earthq.Eng.Struct.Dyn.,2000,29(17):1759-1778
[10]Lopez O A,Chopra A K,Hernandez J J.Evaluation of Combination Rules for Maximum Response Calculation in Multi-component Seismic Analysis[J].Earthq.Eng.Struct.Dyn.,2001,30(13):1379-1398
[11]Menun C,Der Kiureghian A.Envelopes for Seismic Response Vectors.II:Application[J].J.Struct.Eng.,2000,(126):474-81
[12]Penzien J,Watabe M.Characteristics of3-D Earthquake Ground Motions[J].Earthq.Eng.Struct.Dyn.,1975,(3):365-373
[13]Anastassiadis K,Avramidis I,Panetsos P.Concurrent Design Forces in Structures Under Three-component Orthotropic Seismic Excitation[J].Earthquake Spectra,2002,(18):1-17
[14]Athanatopoulou A M.Critical Orientation of Three Correlated Seismic Components[J].Engineering Structures,2005(27):301-312
[15]王滔,郭恩栋,张丽娜.大跨斜拉桥地震动最不利输入方向分析[J].世界地震工程,2007,23(4):107～112 Wang Tao,Guo En-dong,Zhang Li-na.The Critical Direction of Earthquake Input for Dynamic Analysis of a Long Span Cable Stayed Bridge[J].World Earthquake Engineering,2007 23(4):107～112(in Chinese)
[16]朱东生,虞庐松,刘世忠.不规则桥梁地震动输入主方向的研究[J].兰州铁道学院学报(自然科学版),2000,19(6):37～41 Zhu Dong-sheng,Yu Lu-song,Liu Shi-zhong.The Study of Earthquake Input Principal Direction for Irregular Bridges[J].Journal of Lanzhou Railway University(Natural Sciences),2000,19(6):37～41(in Chinese)
[17]GB 50011-2010,建筑抗震设计规范[S]GB 50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
[18]美国加州大学伯克利分校强震数据库[DB/OL].http://peer.berkeley.edu/,PEER Strong Motion Database of the University of California
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