高速铁路CRTSⅢ型板式无砟轨道结构受力特性研究  

Static Response Analysis of CRTS Ⅲ Ballastless Track Structure

作　　者：孙璐[1] 段雨芬[1] 杨薪[1] 

机构地区：[1]东南大学,南京210096

出　　处：《铁道工程学报》2013年第11期32-39,共8页Journal of Railway Engineering Society

摘　　要：研究目的:当前的无砟轨道结构设计方法,对于控制指标、最不利位置和临界荷位的概念并未明确提出。本文选取高速铁路CRTSⅢ型板式无砟轨道结构进行结构静力特性分析;同时计算分析车辆荷载在不同位置处的无砟轨道结构产生的应力大小,以及无砟轨道结构在车辆荷载作用下的临界荷位和最不利位置。研究结论:(1)CRTSⅢ型无砟轨道结构的临界荷位为板端位置;(2)轨道板板底的横向最大拉应力比纵向最大拉应力大,最不利位置在轨道板的板角处;(3)填充层的最大压应力发生在荷载的下方;(4)路基上的无砟轨道结构的支撑层纵向最大拉应力比横向最大拉应力大,最不利位置在荷载位置处,桥梁上的无砟轨道结构底座板的纵向未出现拉应力,横向拉应力发生位置在支撑层的纵向边缘;(5)研究成果可为我国提出具有我国自主知识产权的、国际先进的无砟轨道设计理论与方法提供参考。Research purposes： The current ballastless track structure design method does not specifically mention in the concept of controlling indicators, disadvantageous position and critical loading position. This paper selects static characteristics indicators of slab ballastless track structure based on the CRTS Ⅲ high - speed railway. Simultaneously, it calculates the stress of BTS, getting BTS＇ s critical loading position and the most disadvantageous position. Research conclusions：The results show： （1） The critical loading position of CRTS m ballstless track structure is slab end position; （2） The maximum transverse tensile stress is larger than the maximum longitudinal tensile stress in the bottom of track slab, the disadvantageous position is slab corner; happens under the load; （4） The maximum longitudinal tensile （3） The maximum compressive stress of packed bed stress is larger than the maximum transverse tensile stress on the support layer of ballstless track structure on the subgrade, the disadvantageous position is the load position, the longitudinal tensile stress does not happen on the base plate of ballstless track structure on the bridge, the transverse tensile stress happens on the longitudinal edge of support layer; （5） The research can provide reference for China getting the independent intellectual property rights and the international advanced design of ballastless track and method theory.

关 键 词：CRTS Ⅲ型板式无砟轨道结构 静力特征指标 临界荷位 最不利位置 

分 类 号：U213.2[交通运输工程—道路与铁道工程]