Assessment of Structural Dynamic Response and Vehicle-Track Interaction of Precast Slab Track Systems

Abstract

Recently, precast slab tracks have been used widely in railway applications, especially in conventional urban railway lines. These types of tracks are rapidly constructed and limit interruptions to train operation. However, the problems of dynamic stability when the trains run on the discontinuous type of tracks must be seriously considered. This paper focuses on analyzing the train-track interaction in two types of tracks under the dynamic load by using the numerical analysis program (APATSI) to evaluate the structural response as well as the running safety to precisely understand the load transfer efficiency of precast slab track systems.

Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing

“…Concrete slab tracks (or ballastless tracks) are widely used in the high-speed railway systems in Germany, the Netherlands, China, Japan, and Korea [1,2]. The ballastless track is superior to the conventional ballast track due to its higher track stability, more favorable riding comports, longer service life, and especially lower maintenance cost [2][3][4][5][6]. There are two types of ballastless concrete tracks developed for the high-speed railway system in Korea: (1) continuous concrete slab tracks fabricated using cast-in-place concrete and (2) discrete concrete slab tracks made of precast concrete (PC) [7,8].…”