Retracted: Influence of Track Support Stiffness of Railway Tracks on Track Impact Factor
This article has been corrected.
VIEW CORRECTIONPublication: Journal of Engineering Mechanics
Volume 140, Issue 8
Abstract
Track support stiffness (TSS) is used as a quality index of railway tracks to assess their performance and bearing capacity. TSS depends on the elastic stiffness of the elastic materials and the structural characteristics of the track system. The theoretically designed track impact factor (TIF), which is used to design ballasted and slab tracks in the Republic of Korea, is not detailed enough to describe various track types and TSS. In this study, the relationship between the TSS and the TIF for various types of tracks currently employed in Korean urban transit was assessed by performing field tests using actual vehicles running along the service lines. Field tests were performed on ballasted tracks (with good and bad ballast conditions) and three slab track types (i.e., sleeper-embedded track, rail floating track, and sleeper floating track). The theoretically designed TIF and TSS were compared with the corresponding TIF and TSS measured through field tests for the various track types on the service line. The condition of ballast (gravel) and the spring stiffness of the rail support materials directly affected the TSS. Moreover, the TIF for the service line appeared to increase with the TSS; therefore, it was inferred that the TSS directly affected the TIF.
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Acknowledgments
The writers express sincere appreciation to Seoul Metro and Shinbundang Railroad Co., Ltd. (DX LINE), for providing financial support for this project.
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Published In
Journal of Engineering Mechanics
Volume 140 • Issue 8 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 11, 2013
Accepted: Oct 29, 2013
Published online: Oct 31, 2013
Discussion open until: Jul 7, 2014
Published in print: Aug 1, 2014
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