基于极限状态法的米轨距桥枕结构设计与计算  

Structure Design and Analysis of Bridge Sleeper with Meter Gauge Based on Limit State Method

作　　者：田春香[1] 王平[1] 柯文华 熊维[2] TIAN Chunxiang;WANG Ping;KE Wenhua;XIONG Wei(Southwest Jiaotong University Chengdu,Sichuan 610031,China;China Railway Eryuan Engineering Group Co.Ltd,Chengdu,Sichuan 610031,China)

机构地区：[1]西南交通大学,成都610031 [2]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2022年第4期43-47,共5页Journal of Railway Engineering Society

摘　　要：研究目的:基于相关规范,分析1 000 mm米轨距桥枕在列车轴重以及脱轨荷载下的弯矩,确定桥枕的荷载设计弯矩,对桥枕不同的使用状态进行检算。依据轨枕外形尺寸和配筋,计算分析轨下及枕中截面承载力弯矩及静载试验值等,为轨枕试验提供依据,确定满足极限状态法要求的米轨距桥枕的基本设计方法。研究结论:(1)桥枕设计应考虑脱轨荷载的影响;(2)根据轨枕计算方法,计算了桥枕的荷载弯矩,确定了设计的米轨距桥枕的承载力弯矩和试验荷载值;(3)计算结果表明,桥枕承载力极限状态、正常使用极限状态以及疲劳极限状态检算均满足要求;(4)轨枕静载试验及疲劳试验表明,轨枕符合正负弯矩试验的要求和抗疲劳要求;(5)计算与试验表明,设计的米轨距桥枕可满足项目的使用要求;(6)本研究成果可用于指导米轨铁路项目桥枕的设计。Research purposes: Based on relevant specifications, this paper analyzes the bending moment of 1 000 mm meter gauge sleeper for bridge under train axle load and derailment load, determines the design bending moment of bridge sleeper, and checks the different service states of sleeper for bridge. According to the dimensions and reinforcement of the sleeper, the bearing capacity bending moment and static load test values of rail seat and sleeper center section are calculated, which provides a basis for the test for sleeper. This paper puts forward the basic design method of meter gauge sleeper for bridge meeting the requirements of limit state method.Research conclusions:(1) The influence of derailment load shall be considered in the design of sleeper for bridge;(2) According to the calculation method of sleeper, the load bending moment of the sleeper for bridge is calculated, and the bearing capacity bending moment and test load of the designed meter gauge bridge sleeper are determined;(3) The calculation results show that the checking calculation of bearing ultimate limit states, normal serviceability limit states and fatigue limit states of sleepers for bridge meet the requirements;(4) Static load test and fatigue test show that the sleeper meets the requirements of positive and negative bending moment test and anti-fatigue requirements;(5) The calculation and tests indicate that the designed meter gauge sleeper for bridge can meet the application requirements of the project;(6) The research results can be used to guide the design of bridge sleepers in meter gauge railway projects.

关 键 词：极限状态法 轨枕 承载力 静载试验 疲劳试验 

分 类 号：U239[交通运输工程—道路与铁道工程]