福厦客专乌龙江特大桥主桥主梁设计  

Main Girder Design for Main Bridge of Wulongjiang Super Major Bridge on Fuzhou-Xiamen Passenger Dedicated Line

作　　者：王存国[1] WANG Cunguo(China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan Hubei 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《铁道建筑技术》2023年第5期64-68,共5页Railway Construction Technology

基　　金：中铁第四勘察设计院集团有限公司科技研究开发计划项目(2021K016、2022K086、2022K111)。

摘　　要：根据桥址处地形、地貌、线路条件等要求,福厦客专乌龙江特大桥孔跨布置为(72+109+432+56+56)m,该桥中跨主梁采用钢箱梁,边跨部分区域主梁采用预应力混凝土箱梁,是国内外最大跨度四线铁路高低塔混合梁斜拉桥。主梁采用双主梁+密横梁体系,钢混结合段采用梯形填充混凝土前、后承压板式钢-砼接头构造。采用有限元分析方法,对结构刚度变形以及主梁的受力开展研究,计算结果表明,该桥主梁强度、刚度及抗风稳定性均满足规范要求,具有良好的静、动力特性。该桥型结构优美经济,可为今后桥梁设计提供借鉴和思路。According to the topography,geomorphology,line condition of the bridge site,as well as the design requirements for safety,Wulongjiang Super Major Bridge on Fuzhou-Xiamen PDL Railway with span(70+109+432+56+56)m is the largest span four-line railway cable-stayed bridge with two unequal-height pylons and hybrid girder in the world.The central span is steel girders,and the side spans are mainly prestressed concrete box girders.The girder is composed of the two edge beams and the densely-cross beams.The steel-concrete joint section,a post-load-bearing plate structure,takes form by filling concrete to a trapezoidal frame.The finite element method is used to study the structural stiffness and deformation,and mechanical characteristics of the girder.The calculation results show that the strength,the stiffness and the wind-resistant stability meet the specification requirements.It has good static and dynamic characteristics.The bridge structure is graceful and engineering economy.It can provide reference and train of thought for the design of railway bridges in the future.

关 键 词：客运专线 高低塔斜拉桥 有限元法 混合梁 钢-混结合段 静动力分析 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]