铁道科学与工程学报2018，Vol.15Issue(3)：581-588,8.
重载列车作用下CRTSⅢ型板式轨道结构力学特性试验研究
Experimental study on the mechanical characteristics of CRTSⅢ slab ballastless track under heavy-haul train
摘要
Abstract
Heavy haul railway is the development direction of international railway freight transportation. In this paper, the 1:1 full scale test model of CRTS Ⅲ slab ballastless track structure was established, and experiment study on mechanical characteristics of the track structure under 30-ton axle load was carried out. The mechanical characteristics of the track structure were obtained after 8 million fatigue load tests. The results show that: The dynamic responses of different layers in CRTS Ⅲ slab ballastless track structure increase gradually under the action of fatigue load. After 8 million times of fatigue load tests, the vertical dynamic stiffness and static stiffness of rail fastener increases 24.77% and 23.94% respectively, and the change of vertical dynamic and static stiffness ratio is not obvious, meanwhile, the vertical dynamic and static stiffness of isolation layer increases 152.27% and 136.11% respectively, and the vertical dynamic and static stiffness ratio reduces 6.4%, moreover, the maximum of vertical acceleration of concrete base increases 67.4% and the maximum tensile stress and compressive stress in the middle of the concrete base increases 55.6% and 26.3% respectively. The research results would guide the research of CRTS Ⅲ slab ballastless track structure in heavy-haul railway.关键词
重载列车/CRTSⅢ型板式无砟轨道/试验/力学特性Key words
heavy-haul train/CRTSⅢ slab ballastless track/experiment/mechanical characteristics分类
交通工程引用本文复制引用
曾志平,何贤丰,余志武,魏炜..重载列车作用下CRTSⅢ型板式轨道结构力学特性试验研究[J].铁道科学与工程学报,2018,15(3):581-588,8.基金项目
中南大学研究生创新资助项目(2016zzts397) （2016zzts397）
国家自然科学基金重点资助项目(煤炭联合基金)(U1361204) （煤炭联合基金）
中国铁路总公司科技开发计划课题资助项目(SY2016G001) （SY2016G001）
