马鞍山三塔悬索桥抗震性能研究
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摘要
以马鞍山三塔悬索桥的工程设计为背景,根据大桥结构的重要性确定了桥梁在两种概率水平的地震作用下的设防标准,并提出了相应的性能目标。根据桥址处地震危险性分析研究报告所给定的地震动数据对大桥进行反应谱分析和非线性动力时程分析,研究该桥的动力特性和地震反应特点,根据分析结果研究确定优化桥梁的抗震性能措施。经过计算分析比较得出,通过加设合理的液压阻尼装置可以减小结构在地震作用下的结构响应,提高全桥结构的能力需求比,增强了该桥的抗震性能水平,有利于桥梁结构在地震中的安全。
According to the structural importance of Ma'anshan three-pylon suspension bridge,a seismic fortification criterion under two kinds of earthquake action probability level was determined and the corresponding target of seismic performance was brought out based on the design of the bridge.Ground motion parameters at the site of the bridge were obtained from the seismic risk analysis report,and the seismic response analysis of the bridge was undergone accordingly by means of the seismic response spectrum method and the nonlinear seismic time-history dynamic method to study the dynamic character and response under earthquake action.The optimization measures of the bridge seismic performance were determined based on the analytical result.It is concluded that the bridge seismic response under earthquake action can be decreased and the capability-demand ratio can be increased by using reasonable hydraulic damper to enhance the seismic performance and safety of the bridge.
According to the structural importance of Ma'anshan three-pylon suspension bridge,a seismic fortification criterion under two kinds of earthquake action probability level was determined and the corresponding target of seismic performance was brought out based on the design of the bridge.Ground motion parameters at the site of the bridge were obtained from the seismic risk analysis report,and the seismic response analysis of the bridge was undergone accordingly by means of the seismic response spectrum method and the nonlinear seismic time-history dynamic method to study the dynamic character and response under earthquake action.The optimization measures of the bridge seismic performance were determined based on the analytical result.It is concluded that the bridge seismic response under earthquake action can be decreased and the capability-demand ratio can be increased by using reasonable hydraulic damper to enhance the seismic performance and safety of the bridge.
引文
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[10]聂利英.大跨度悬索桥抗震设计研究[D].上海:同济大学,2004.NIE Liying.Earthquake Resistant Design and Research of Sus-pension Bridge with Great Span[D].Shanghai:Tongji Uni-versity,2004.
[2]王克海.桥梁抗震研究[M].北京:中国铁道出版社,2007.WANG Kehai.Bridge Seismic Research[M].Beijing:Chi-na Railway Publishing House,2007.
[3]张行,李黎,龙晓鸿.大跨度悬索桥地震反应分析及其抗震性能评价[J].工程抗震与加固改造,2007,29(1):85-88.ZHANG Xing,LI Li,LONG Xiaohong.Seismic ResponseAnalysis and Performance Evaluation of a Long-span SuspensionBridge[J].Earthquake Resistant Engineering andRetrofitting,2007,29(1):85-88.
[4]同济大学土木工程防灾国家重点实验室.马鞍山长江公路大桥左汊三塔悬索桥抗震性能施工设计阶段研究报告[R].上海:同济大学土木工程防灾国家重点实验室,2009.State Key Laboratory of Civil Engineering and Disaster Preven-tion,Tongji University.Research Report on Seismic Perfor-mance of Three-tower Suspension Bridge at Ma’anshan YangtzeRiver Highway Bridge at the Period of Design and Construction[R].Shanghai:State Key Laboratory of Civil Engineering andDisaster Prevention,Tongji University,2009.
[5]BUCKLE I,FRIEDLAND I,MANDER J,et al.公路结构物抗震加固改造手册[M].王克海,李茜,莫勋涛,等译.北京:人民交通出版社,2008.BUCKLE I,FRIEDLAND I,MANDER J,et al.Seismic RetrofitManual for Highway Structures[M].WANG Kehai,LI Qian,MOXuntao,et al,.translated.Beijing:China Communications Press,2008.
[6]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Lichu,HU Shide,YE Aijun.Seismic Design of Bridgewith Great Span[M].Beijing:China Communications Press,2001.
[7]范立础.桥梁抗震[M].上海:同济大学出版社,1997.FAN Lichu.Bridge Seismic Resistance[M].Shanghai:TongjiUniversity Press,1997.
[8]尼尔斯J.吉姆辛.缆索支承桥梁:概念与设计[M].北京:人民交通出版社,2002.GIMSING N J.Cable Supported Bridges:Concept&Design[M].Beijing:China Communications Press,2002.
[9]雷俊卿,郑明珠,徐恭义悬索桥设计[M]北京:人民交通出版社,2002.LEI Junqing,ZHENG Mingzhu,XU Gongyi.Suspension BridgeDesign[M].Beijing:China Communications Press,2002.
[10]聂利英.大跨度悬索桥抗震设计研究[D].上海:同济大学,2004.NIE Liying.Earthquake Resistant Design and Research of Sus-pension Bridge with Great Span[D].Shanghai:Tongji Uni-versity,2004.
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