大跨度连续梁桥在不同激励方式下地震响应
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摘要
为解决大跨度连续梁桥抗震设计理论不完善的问题,以六库怒江大桥为工程背景,采用MIDAS/CIVIL有限元软件建立三跨混凝土连续梁桥有限元模型,分别进行反应谱一致激励、时程一致激励和时程多点激励,在不同激励方法条件下大对跨度桥梁地震反应进行对比分析.结果表明:反应谱法在桥梁抗震响应分析中存在局限性,在对大跨度连续桥梁地震响应分析中考虑时程多点激励才能更真实地反应出结构的地震响应.
In order to solve the problem of imperfect seismic design theory of large-span continuous girder bridge, this paper focuses on the basic principles of seismic analysis of bridge response spectrum method and time history analysis method on the engineering background of Liuku Nujiang river Bridge. This study applies the finite element software MIDAS/CIVIL, sets up finite element model of three-span concrete continuous girder bridge, and gets the corresponding seismic response of bridge structure by using response spectra consistent motivation, time-consistent incentive and time multi-support excitation, and follows by comparing the result of the analysis under three kinds of incentives. The result points out the limitation of application of bridge seismic response spectrum method, which suggests taking into account of the effect of multi-support excitation on bridge structure.
In order to solve the problem of imperfect seismic design theory of large-span continuous girder bridge, this paper focuses on the basic principles of seismic analysis of bridge response spectrum method and time history analysis method on the engineering background of Liuku Nujiang river Bridge. This study applies the finite element software MIDAS/CIVIL, sets up finite element model of three-span concrete continuous girder bridge, and gets the corresponding seismic response of bridge structure by using response spectra consistent motivation, time-consistent incentive and time multi-support excitation, and follows by comparing the result of the analysis under three kinds of incentives. The result points out the limitation of application of bridge seismic response spectrum method, which suggests taking into account of the effect of multi-support excitation on bridge structure.
引文
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[11]李伟慈.大跨超长连续梁桥纵向抗震设计研究[J].北方交通,2010(12):31-34.Li Weici,Computing method comparison of lam inated rubber bearing of damestic and overseas bridges[J].Northern Communications,2010(12):31-34.
[12]Smith K G.Innovoation in Earthquake Resistant Concrere Design Philosophies:A Century of Progress since Hennebique’s Patent[J].Engineer Structure,2001,23:72-81.
[13]孔庆河,李铭铭,张文德.地震勘探中平均速度的求取方法及应用[J].辽宁工程技术大学学报:自然科学版,2012,30(1):54-56.Kong Qinghe,Li Mingming,Zhang Wende.Calculation method of average velocity in seismic exploration and its application[J].Journal of Liaoning Technical University:Natural Science,2012,30(1):54-56.
[2]黄文雄,谭力英,吴明威.从长江大桥看桥梁发展[J].长江大学学报:自然版,2006,3(2):593-596.Huang Wenxiong,Tan Liying,Wu Mingwei.The analysis the development of bridge based on the Yangtze River Bridge[J].Journal of Yangtze University:Nat Sci Edit,2006,3(2):593-596.
[3]赵文华,张彬,麻艳娇.土-基础结构相互作用下的桥墩结构抗震响应[J].辽宁工程技术大学学报:自然科学版,2013,32(9):1 260-1 264.Zhao Wenhua,Zhang Bin,Ma Yanjiao.Seismic response of the system of soil and foundation in bridge structure unden earth quake[J].Journal of Liaoning Technical University:Natural Science,2013,32(9):1 260-1 264.
[4]王彬力.大跨连续刚构桥地震反应特性研究[D].成都:西南交通大学研究生院,2006.Wang Binli.Study on the characteristic of seismic response of bridge with long span[D].Chengdu:Graduate School of Southwest Jiaotong University,2006.
[5]喻梅,贾宏宇,洪浩,等.山区高墩桥梁的多点激励随机响应[J].公路交通科技,2013,30(6):27-32.Yu Mei,Jia Hongyu,Hong Hao,et al.Random response of high-rise pier bridge subjected to multi-excitation in mountain area[J].Journal of Highway and Transportation Research and Development,2013,30(6):27-32.
[6]葛娟娟.铅销橡胶支座在梁拱组合桥梁中的减隔震应用研究[D].西安:长安大学研究生院,2006.Ge Juanjuan.Seismic isolation application of LRB beam in arch combination bridge[D].Xi’an:Graduate School of Changan University,2006.
[7]Cai Y X,Gould PL,Desai CS.Nonlinear Analysis of 3D seismic Interaction of Soil—Pile—Structure Systems and Application.Engineering.Structure,2000(22):191-199.
[8]熊欢.高墩大跨度连续刚构桥地震响应分析研究[D].重庆:重庆交通大学研究生院,2011.Xiong Huan.Analysis of seismic response of high piers and long span continuous rigid frame bridge[D]Chongqing:Graduate School of Chongqing Jiaotong University,2011.
[9]花双陆,徐利军.桥梁抗震理论及其控制[J].山西建筑,2010,36(27):319-320.Hua Shuanglu,Xu Lijun.The theory and control of bridge seismic[J].Shanxi Architecture,2010,36(27):319-320.
[10]吴东.多点激励下大跨度桥梁的地震反应分析[D].成都:西南交通大学研究生院,2006.Wu Dong,Earthquake response analysis of multi-point excitation of large-span bridges[D]Chengdu:Graduate School of Southwest Jiaotong University,2006.
[11]李伟慈.大跨超长连续梁桥纵向抗震设计研究[J].北方交通,2010(12):31-34.Li Weici,Computing method comparison of lam inated rubber bearing of damestic and overseas bridges[J].Northern Communications,2010(12):31-34.
[12]Smith K G.Innovoation in Earthquake Resistant Concrere Design Philosophies:A Century of Progress since Hennebique’s Patent[J].Engineer Structure,2001,23:72-81.
[13]孔庆河,李铭铭,张文德.地震勘探中平均速度的求取方法及应用[J].辽宁工程技术大学学报:自然科学版,2012,30(1):54-56.Kong Qinghe,Li Mingming,Zhang Wende.Calculation method of average velocity in seismic exploration and its application[J].Journal of Liaoning Technical University:Natural Science,2012,30(1):54-56.
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