中美轨枕设计方法对比与分析  

Comparison and Analysis of Design Methods for Sleeper between China and North America

作　　者：田春香[1] 王平[1] 熊维[2] 莫宏愿 TIAN Chunxiang;WANG Ping;XIONG Wei;MO Hongyuan(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》2020年第10期49-53,89,共6页Journal of Railway Engineering Society

摘　　要：研究目的:基于中美轨枕的设计方法,根据确定的外形尺寸和配筋,本文以1676 mm宽轨距轨枕为例,介绍中美轨枕结构设计方法的差异并对其进行分析,主要包括轨枕的设计荷载、轨枕截面承载力、轨枕截面的疲劳承载力及静载抗裂试验和疲劳试验荷载的确定。研究结论:(1)整体上中美轨枕设计方法均遵循各自的设计经验,满足各自的运输条件和需求;(2)由于结构设计理论及材料取值不同,按国内方法和AREMA计算得出的轨枕设计荷载及轨枕截面承载力弯矩值差异较大;(3)中美规范都以混凝土开裂为基础确定轨枕静载试验荷载;(4)同一荷载图示下,按照中国规范设计轨枕的承载能力可达到美国标准的使用要求;(5)本文研究可为海外铁路混凝土枕的设计提供参考。Research purposes:Based on the design methods of Chinese and American sleepers and according to the determined external dimensions and reinforcement,this paper takes a 1676 mm broad gauge sleeper as an example,compares and analyzes the differences between the structural design methods of Chinese and American sleepers,mainly including the design load,cross-section bearing capacity,cross-section fatigue bearing capacity and determination of crack resistance test under static load and fatigue test load.Research conclusions:(1)The design methods of sleepers in Chinese code and AREMA are based on their experience which can meet their transportation conditions and demand.(2)As the strength of concrete and design method is inconsistent in Chinese code and AREMA,the sleeper design load and the bending moment value of sleeper cross-section bearing capacity according the codes are quite different.(3)The load of sleeper static test is determined based on the concrete crack in both Chinese code and AREMA.(4)Under the same axle load,the bearing capacity of sleeper designed according to Chinese code can meet the requirement of AREMA.(5)The research result can provide reference for the design of sleepers used in overseas railways.

关 键 词：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]