铁道科学与工程学报2017，Vol.14Issue(11)：2323-2332,10.
简支梁桥上Ⅰ型板式无砟轨道制动力与位移分析
Analysis of braking force and displacement for CRTSⅠ slab ballastless track on simply supported bridge
摘要
Abstract
Based on finite element method, the space coupling model of CRTSⅠslab ballastless track CWR on multi span simply supported bridge was established to study the force deformation characteristic of rail, track slab and bed plate under the action of train's braking force and to analyze the related parameters. The research results show that the position of the rail braking force peak appears on the abutment and movable supports under the action of train's braking force, the longitudinal displacement of rail has decreased after increasing and reached the maximum value in the movable bearing of midspan, the longitudinal contraction trend of rail and track slab are coincident approximately, it indicates that the fastener has played a good restriction effect. The mode of braking loading has great influence on the longitudinal force and displacement of the track structure, two trains of the same direction brake on both sides of the bridge at the same time should be avoided in an emergency, in order to prevent the rail bearing excessive tension and avoid fastener failure because of the relative displacement of the track slab and rail is too long. Small resistance fastener is advantageous for the force of CRTSⅠ slab ballastless track on bridge, but the relative displacement of the track slab and rail can't be too long, to ensure the longitudinal displacement of rail can be controlled. With the increase of the longitudinal stiffness of bridge piers, the force of the track structure will be reduced. Therefore, in order to improve the force condition of the track structure on the bridge, it is possible to adopt the low pier bridge with large rigidity as far as possible.关键词
简支梁桥/CRTSⅠ型板式无砟轨道/制动荷载/制动力/纵向位移/轨道板/底座板应力Key words
simply supported bridge/CRTSⅠ slab ballastless track/braking load/breaking force/longitudinal displacement/stress of track slab/bed plate分类
交通工程引用本文复制引用
张鹏飞,桂昊,高亮,雷晓燕,潘鹏..简支梁桥上Ⅰ型板式无砟轨道制动力与位移分析[J].铁道科学与工程学报,2017,14(11):2323-2332,10.基金项目
国家自然科学基金资助项目(51768023,51578056) （51768023,51578056）
江西省教育厅资助项目(GJJ150548) （GJJ150548）
北京交通大学轨道工程北京市重点实验室开放研究基金资助项目(2014001) （2014001）
