高烈度区单线铁路大跨混凝土连续梁桥抗震设计
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摘要
宿淮铁路徐洪河特大桥位于地震高烈度区,主桥段采用单线大跨度预应力混凝土连续梁跨越徐洪河防洪大堤及航道。以徐洪河特大桥主桥抗震设计为主线,介绍大桥抗震设计过程中遵循的设计思路及设计方法,详细论述通过抗震概念设计确定适合于本桥工程特点的结构体系及抗震体系,结合桥梁结构地震反应分析,指导桥梁结构设计及抗震措施,最终实现抗震设计目标的过程。通过对多个抗震体系方案的分析比对,最终选择了FPS支座并联粘滞阻尼器的减隔震设计方案,此相对于传统抗震设计方法在技术及经济方面具有显著的优越性。
Xuhong River Bridge on Suzhou-Huaiyin Railway is located in high seismic intensity area,with a long-span single-track continuous prestressed concrete girder to cross above the flood control dyke and the channel of the Xuhong River.This paper,takes the seismic design of main bridge of Xuhong River Bridge as the example to introduce the design idea and design methods of bridge seismic design.This paper also discusses how to use the seismic concept design to obtain the structure system and seismic system which are suitable to the characteristics of this project.Combined with the seismic response analysis on the bridge,the design of bridge structure and anti-seismic measures are guided,eventually the objectives of seismic design are achieved.Through the analysis and contrast of multiple seismic systems,the seismic isolation design scheme of the FPS bearing connecting with viscous damper in parallel is selected finally.Remarkable superiorities of the seismic isolation scheme in technology and economy are showed compared with traditional seismic design methods.
Xuhong River Bridge on Suzhou-Huaiyin Railway is located in high seismic intensity area,with a long-span single-track continuous prestressed concrete girder to cross above the flood control dyke and the channel of the Xuhong River.This paper,takes the seismic design of main bridge of Xuhong River Bridge as the example to introduce the design idea and design methods of bridge seismic design.This paper also discusses how to use the seismic concept design to obtain the structure system and seismic system which are suitable to the characteristics of this project.Combined with the seismic response analysis on the bridge,the design of bridge structure and anti-seismic measures are guided,eventually the objectives of seismic design are achieved.Through the analysis and contrast of multiple seismic systems,the seismic isolation design scheme of the FPS bearing connecting with viscous damper in parallel is selected finally.Remarkable superiorities of the seismic isolation scheme in technology and economy are showed compared with traditional seismic design methods.
引文
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[2]张小坤.高烈度地震区的桥梁设计研究[J].铁道工程学报,2009(4):31-34.
[3]郭磊,李建中,范立础.大跨度连续梁桥减隔震设计研究[J].土木工程学报,2006(3):81-85.
[4]陈永祁,耿瑞琦,马良.桥梁用液体粘滞阻尼器的减振设计和类型选择[J].土木工程学报,2007(7):55-61.
[5]范力础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
[6]周高瞻,闫维明,李素梅.橡胶支座和粘滞阻尼器在连续梁桥减、隔震中联合应用研究[C]∥第16届全国结构工程学术会议论文集(第Ⅲ册).北京:《工程力学》杂志社,2007:305-311.
[7]孟宪锋,朱晞.梁式桥防止地震碰撞及落梁装置与措施的研究进展[J].工程抗震与加固改造,2005(2):71-75.
[8]王志强.隔震桥梁分析方法及设计理论研究[D].上海:同济大学,2000.
[9]潘湘文.采用LUD轨道交通桥梁的工作性能研究[D].上海:同济大学,2010.
[10]叶爱君,管仲国.桥梁抗震[M].2版.北京:人民交通出版社,2011.
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