市域铁路大跨度简支钢系杆拱桥设计方案  

Design Scheme of City Railway Large-span Simply Supported Steel Tied Arch Bridge

作　　者：程石利 CHENG Shili(China Railway Shanghai Design Institute Group Co.,Ltd.,200070,Shanghai,China)

机构地区：[1]中铁上海设计院集团有限公司,上海200070

出　　处：《城市轨道交通研究》2023年第S02期54-58,共5页Urban Mass Transit

摘　　要：市域铁路作为轨道交通体系的重要一环,在城市建设中占有重要地位。结合某市域铁路工程,研究大跨度简支钢系杆拱桥的适应性,分析其受力特性,并进行结构参数的对比研究。结果表明:200 m的简支钢系杆拱桥在市域铁路中的应用合理可行;采用带外伸跨的连续梁系杆拱体系,能大幅改善梁端转角,为该类型桥梁主跨的进一步拓展提供了一个可行的方向;拱桥采用较大矢跨比有利于结构受力;网状吊杆形式较竖直吊杆对结构竖向刚度、梁端转角改善明显。As an important part of rail transit system,suburban railway plays an important role in urban construction.Taking a city railway project,the adaptability of large-span simply supported steel tied arch bridge is studied,and its mechanical characteristics are analyzed,making a comparative study of structural parameters.The results show that the application of 200 m simply supported steel tied arch bridge in city railway is reasonable and feasible;using the continuous beam tied arch system with extended span can greatly reduce the beam-end rotation angle,which provides a feasible direction for the main span of this bridge type to further enlarge;adopting large rise-span ratio of arch bridge is conducive to the structural stress;compared with vertical suspender,the mesh suspender can significantly improve the structural vertical stiffness and beam-end rotation angle conditions.

关 键 词：市域铁路 大跨度桥梁 钢系杆拱桥 网状吊杆 结构分析 

分 类 号：U239.5[交通运输工程—道路与铁道工程]