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Mathematical Problems in Engineering
Volume 2018, Article ID 3730649, 16 pages
https://doi.org/10.1155/2018/3730649
Research Article

Key Characteristics of a Floating Slab Track Based on Longitudinal Interaction Analysis

1Department of Civil Engineering, Kyung Hee University, Yongin, Gyeonggi-do 17104, Republic of Korea
2Department of Transportation System Engineering, Graduate School of Transportation, Korea National University of Transportation, Gyeonggi-do 16106, Republic of Korea
3Department of Civil Engineering, University of Colorado Denver, 1200 Larimer Street, Denver, CO 80217, USA

Correspondence should be addressed to Heeyoung Lee; rk.ca.uhk@8090gnuoyeeh and Wonseok Chung; rk.ca.uhk@gnuhcsw

Received 26 January 2018; Revised 23 April 2018; Accepted 6 May 2018; Published 26 July 2018

Academic Editor: Francesco Pellicano

Copyright © 2018 Goo Sam Jee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The passage of railway vehicles produces mechanical vibrations across an extensive range of frequencies. A floating slab track (FST) has recently been proposed and constructed in Korea to reduce the vibrations and noise that result from typical railway operation. The main objective of this study is to investigate the behavior of an FST by means of an interaction analysis of a track-slab-isolator. Key FST parameters considered in this study are additional rail stress, slab stress and displacement, and stopper displacement. The FST parameters include slab length and thickness, isolator stiffness, and longitudinal stiffness. The sensitivity of the key characteristics of each FST parameter is examined. This study also determines the maximum length of an FST based on the maximum additional rail stress criterion. Finally, a formula to predict maximum additional rail stress is proposed for the design of FST systems.