市域铁路简支箱梁结构设计研究  

Research on structure design of simply-supported box girder for urban region railways

作　　者：张晗 Zhang Han

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102627

出　　处：《现代城市轨道交通》2023年第10期20-24,共5页Modern Urban Transit

基　　金：中铁第五勘察设计院集团有限公司2022年度可研计划课题(T5Y2022-B03)。

摘　　要：市域铁路作为城市轨道交通的延伸线路,在城市通勤、旅游、商业等方面发挥着重要作用。文章对市域铁路常用跨度简支梁的结构设计进行研究。通过Midas Civil软件建立简支梁模型,分析得出市域铁路ZS荷载跨中弯矩为城市轨道交通B型车荷载跨中弯矩的1.4倍,进而确定市域铁路常用跨度简支梁的合理梁高。并对支座到梁端的距离和支座横向间距进行研究,选择最优参数,保证梁的安全性和稳定性。同时,为进一步提升常用跨度标准简支梁的经济性,对采用高强钢绞线和普通钢绞线简支箱梁的造价进行对比。研究结论可为市域铁路常用跨度简支箱梁的设计提供参考依据。Urban rail transit serves as an extension of the city's transportation network and plays a vital role in commuting,tourism,and commercial activities.This paper studies the structural design of commonly used simply-supported box girders for urban rail transit with various spans.By establishing a simple beam model using Midas Civil software,the study determines that the mid-span bending moment of ZS load of urban rail transit is 1.4 times of the mid-span bending moment of B-type vehicle load,thereby determining the appropriate beam height for commonly used simply-supported box girders for urban rail transit.The study also examines the distance from the support to the beam end and the transverse spacing of the support,selecting optimal parameters to ensure the safety and stability of the beam.Furthermore,the study compares the cost of using highstrength steel strands and ordinary steel strands for simply-supported box girders to further improve the economic efficiency of commonly used span standard simply-supported box girders.The research conclusions can provide reference for the design of commonly used span simply-supported box girders for urban rail transit.

关 键 词：市域铁路 简支梁 常用跨度 合理梁高 支座横向间距 

分 类 号：U239.5[交通运输工程—道路与铁道工程] U442.5[建筑科学—桥梁与隧道工程]