无初始裂缝的无砟轨道裂缝扩展研究  

EXTENSION RESEARCH ON BI-BLOCK BALLASTLESS TRACK CRACK OF NO INITIAL CRACK

作　　者：魏中臣 伍曾[1] 罗曜波 张景坤[1] 宁晓骏[1] 

机构地区：[1]昆明理工大学建筑工程学院,昆明650500

出　　处：《低温建筑技术》2016年第11期39-41,共3页Low Temperature Architecture Technology

基　　金：国家自然科学基金(青年)项目(51208240);国家自然科学基金(地区)项目(51468027);中国博士后基金项目(2014M552549XB)

摘　　要：基于双块式无砟轨道的计算模型,针对道床板上不同荷载分别作用在跨中轨枕和端部轨枕时,每种情况下裂缝单元数量的增加情况,并对比跨中和端部轨枕承受相同荷载时的裂缝单元数量和最大范梅塞斯应力。研究表明:在相同荷载作用下,荷载作用在跨中裂缝单元数是荷载作用在端部的裂缝单元数的六至十倍,并随着荷载的增加。Based on mechanical calculation model of bi-block ballastless track, focusing on the different load on mid-span sleeper or on the end of sleeper, the number of cracks element increased situation in each case is studied, and when the equal load on mid-span sleeper and on the end of sleeper, the amount of cracks element and the maximum von Mises stress is contrast. The reseach shows：in the same load, the amount of cracks when load on the mid-span sleeper six to ten times of the amount of cracks when load on the end of sleeper with the increase of load, the multiple relationship between them gradually decreased.

关 键 词：双块式无砟轨道 裂缝单元数 范梅塞斯应力 

分 类 号：TU375[建筑科学—结构工程]