Research on expansion joint for high-speed railway long-span bridges in China  

作　　者：Hui Guo Jinzhou Jiang Suoting Hu Chun Yang Qiqi Xiang Kou Luo Xinxin Zhao Bing Li Ziquan Yan Liubin Niu Jianye Zhao 

机构地区：[1]China Academy of Railway Sciences Corporation Limited,Railway Engineering Research Institute,Beijing,China and State Key Laboratory for Track System of High-speed Railway,China Academy of Railway Sciences Corporation Limited,Beijing,China [2]China Academy of Railway Sciences Corporation Limited,Railway Engineering Research Institute,Beijing,China [3]CMCU Engineering Co.,Ltd.,China National Machinery Industry Corporation,Chongqing,China [4]First Design Department,China Railway Group Ltd,Major Bridge Reconnaissance and Design Institute,Wuhan,China [5]State Key Laboratory for Track System of High-speed Railway,China Academy of Railway Sciences Corporation Limited,Beijing,China and China Academy of Railway Sciences Corporation Limited,Railway Engineering Research Institute,Beijing,China [6]Ma'anshan Yangtze River Bridge Headquarters,Ning'an Railway Co.,Ltd.,China Railway Shanghai Group,Ma'anshan,China [7]China Academy of Railway Sciences Corporation Limited,Infrastructure Inspection Research Institute,Beijing,China

出　　处：《Railway Sciences》2025年第1期52-81,共30页铁道科学(英文)

基　　金：National Key R&D Program of China(2022YFB2602900);R&D Fund Project of China Academy of Railway Sciences Corporation Limited(2021YJ084);Project of Science and Technology R&D Program of China Railway(2016G002-K);R&D Fund Project of China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.(2021);R&D Fund Project of China Railway Shanghai Group(2021141).

摘　　要：Purpose–The bridge expansion joint(BEJ)is a key device for accommodating spatial displacement at the beam end,and for providing vertical support for running trains passing over the gap between the main bridge and the approach bridge.For long-span railway bridges,it must also be coordinated with rail expansion joint(REJ),which is necessary to accommodate the expansion and contraction of,and reducing longitudinal stress in,the rails.The main aim of this study is to present analysis of recent developments in the research and application of BEJs in high-speed railway(HSR)long-span bridges in China,and to propose a performance-based integral design method for BEJs used with REJs,from both theoretical and engineering perspectives.Design/methodology/approach–The study first presents a summary on the application and maintenance of BEJs in HSR long-span bridges in China representing an overview of their state of development.Results of a survey of typical BEJ faults were analyzed,and field testing was conducted on a railway cable-stayed bridge in order to obtain information on the major mechanical characteristics of its BEJ under train load.Based on the above,a performance-based integral design method for BEJs with maximum expansion range 1600 mm(±800 mm),was proposed,covering all stages from overall conceptual design to consideration of detailed structural design issues.The performance of the novel BEJ design thus derived was then verified via theoretical analysis under different scenarios,full-scale model testing,and field testing and commissioning.Findings–Two major types of BEJs,deck-type and through-type,are used in HSR long-span bridges in China.Typical BEJ faults were found to mainly include skewness of steel sleepers at the bridge gap,abnormally large longitudinal frictional resistance,and flexural deformation of the scissor mechanisms.These faults influence BEJ functioning,and thus adversely affect track quality and train running performance at the beam end.Due to their simple and integral structure,deck-ty

关 键 词：High-speed railway(HSR) Long-span bridge Bridge expansion joint(BEJ) Integral design Rail expansion joint(REJ) Overall stiffness Longitudinal frictional resistance 

分 类 号：U21[交通运输工程—道路与铁道工程]