01556710

Component

In order to study the length of the slab in the unit twin-block ballastless track, the finite element method is adopted to establish a solid model taking the temperature falling in the whole structure and the temperature gradient into account. The results show that: at the maximum temperature drop of 80℃, the unit slab will not crack. Under positive and negative temperature gradient, with the growth of the slab length, the warping deformation increases to certain value and then keep unchanged. At this time, the slab is in a steady state under the joint action of temperature gradient and gravity. In addition, with the growth of the slab length, the maximum tensile stress in the slab increases. In order to keep the temperature warping deformation steady and the maximum tensile stress smaller, the suitable length of the unit slab is 6m.

This paper was sponsored by TRB committee AR055 Rail Transit Infrastructure.

01550057

15-1203

English

14p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References; Tables

Ballastless track; Finite element method; Length; Slabs; Temperature gradients; Tensile strength; Tension; Warpage

Design; Railroads; Terminals and Facilities; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2015 Paper #15-1203

TRIS, TRB, ATRI

Dec 30 2014 12:28PM