广珠铁路虎跳门特大桥主桥连续刚构拱设计
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摘要
广珠铁路虎跳门特大桥主桥采用(120+248+120)m连续刚构柔性拱组合结构,桥型与跨度在世界单线铁路桥梁中均居领先地位。详细介绍该桥的设计特色,研究(120+248+120)m刚构拱受力特性、承载能力、抗震、车桥动力响应等结构特性。该新型连续刚构柔性拱组合结构,梁拱共同受力,梁部弯矩通过吊杆转换为拱的轴向力,使拱与梁在受力方面的优点得以充分发挥,主梁承受弯矩及截面尺寸显著减小;由于拱的竖向加劲作用,结构竖向整体刚度大,外形轻巧;该桥具有良好的抗震及行车性能。
Main bridge of super-large Hutiaomen bridge on Guangzhou-Zhuhai railway adopted(120+248+120)m continuous rigid frame and flexible arch composite structure,both the bridge type and span are in the lead among the world single track railway bridges.The paper elaborates the design features of the(120+248+120)m bridge,studies the behavior,loading capacity,seismic and train/bridge dynamic responses and other structural characteristics of the rigid frame arch.This new type continuous rigid frame and flexible arch composite structure features cooperated work of beam and arch: moments in the beam transferes through tie rods and transformed into axial forces in the arch,giving full play to both the performance merits of arch and beam,moments and dimension of the girder are significantly reduced;relying on the vertical rigidity of the arch,overall vertical rigidity of the structure becomes very large while it appears light and wonderful;the bridge possesses good ability in anti-vibration and for traffic.
Main bridge of super-large Hutiaomen bridge on Guangzhou-Zhuhai railway adopted(120+248+120)m continuous rigid frame and flexible arch composite structure,both the bridge type and span are in the lead among the world single track railway bridges.The paper elaborates the design features of the(120+248+120)m bridge,studies the behavior,loading capacity,seismic and train/bridge dynamic responses and other structural characteristics of the rigid frame arch.This new type continuous rigid frame and flexible arch composite structure features cooperated work of beam and arch: moments in the beam transferes through tie rods and transformed into axial forces in the arch,giving full play to both the performance merits of arch and beam,moments and dimension of the girder are significantly reduced;relying on the vertical rigidity of the arch,overall vertical rigidity of the structure becomes very large while it appears light and wonderful;the bridge possesses good ability in anti-vibration and for traffic.
引文
[1]罗世东,严爱国,刘振标.大跨度连续刚构柔性拱组合桥型研究[J].铁道科学与工程学报,2004(2):57-62.
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[3]陈宝春.钢管混凝土拱桥设计与施工[M].北京:人民交通出版社,1999.
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[6]西南交通大学结构工程试验中心.新建铁路广珠线虎跳门特大桥地震反应分析报告[R].成都:西南交通大学结构工程试验中心,2009.
[7]中南大学土建学院.虎跳门特大桥动力特性及列车走行性分析报告[R].长沙:中南大学土建学院,2009.
[8]孙潮,陈宝春,陈友杰.钢管混凝土拱桥转体施工方法[J].工程力学,2001(增刊):515-519.
[9]庄卫林,黄道全,谢邦珠,等.丫髻沙大桥转体施工工艺设计[J].桥梁建没,2000(1):37-41,50.
[10]罗世东,严爱国,刘振标.宜万铁路宜昌长江大桥主桥创新技术研究[J].桥梁建设,2006(S2):12-15.
[2]铁道部第一勘测设计院,兰州铁道学院.涵洞与拱桥[M].北京:中国铁道出版社,1994.
[3]陈宝春.钢管混凝土拱桥设计与施工[M].北京:人民交通出版社,1999.
[4]Packer J A,Henderson J E,Cao J J(曹俊杰).空心管结构连接设计指南[M].北京:科学出版社,1997.
[5]徐升桥,尹浩辉.丫髻沙大桥的设计与施工[J].铁道标准设计,2000(5):9-16.
[6]西南交通大学结构工程试验中心.新建铁路广珠线虎跳门特大桥地震反应分析报告[R].成都:西南交通大学结构工程试验中心,2009.
[7]中南大学土建学院.虎跳门特大桥动力特性及列车走行性分析报告[R].长沙:中南大学土建学院,2009.
[8]孙潮,陈宝春,陈友杰.钢管混凝土拱桥转体施工方法[J].工程力学,2001(增刊):515-519.
[9]庄卫林,黄道全,谢邦珠,等.丫髻沙大桥转体施工工艺设计[J].桥梁建没,2000(1):37-41,50.
[10]罗世东,严爱国,刘振标.宜万铁路宜昌长江大桥主桥创新技术研究[J].桥梁建设,2006(S2):12-15.
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