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An Experimental Study for Longitudinal Resistance of Ballast Track on Bridge
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 Title & Authors
An Experimental Study for Longitudinal Resistance of Ballast Track on Bridge
Min, Kyung-Hwan; Yun, Kyung-Min;
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 Abstract
When a ballast track of a high-speed train is constructed on a bridge, the displacement of the bridge decks can occur because they are not fixed to the rails. Moreover, relative displacements occur between the bridge and rails caused by temperature changes and external loads. The current longitudinal resistance criteria (UIC Code 774-3, KR C-08080) on ballast tracks with continuous welded rails (CWRs) do not take into account the longitudinal movement of the bridge and the frictional force between the ballast and slabs. In addition, the magnitude of the longitudinal resistance, k, is calculated somewhat conservatively and, (therefore?) it acts as an unfavorable element in the design of long span and continuous railway bridges. Thus, in order to replicate the actual behavior more effectively, the longitudinal resistance of CWRs should take into account the additional rigidity between the slab and track. In this study, the longitudinal resistances of the ballasted track on the bridge were analyzed by carrying out an experimental study with a test setup designed to simulate the deck and bed track. In the test results, the maximum longitudinal resistances of the tests were similar to the resistances of the current codes, however, the measured longitudinal stiffness designed to limit the displacement of the tests were much smaller in comparison with the longitudinal stiffness on the codes.
 Keywords
Ballast track;Bridge deck;CWR track;Longitudinal resistance;Mock-up test;
 Language
Korean
 Cited by
 References
1.
KR (2013) Ballast Track Structures, KR C-14030, Korea Rail Network Authority.

2.
KR (2012) Track-Bridge Longitudinal Interaction Analysis, KR C-08080, Korea Rail Network Authority.

3.
UIC (2001) Track/bridge Interaction Recommendations for Calculations, UIC Code 774-3, International Union of Railways, pp.2-8

4.
R. J. van't Zand and ing. J. Moraal (1997) Ballast Resistance under Three-Dimensional Loading, ERRI D 202/DT 362, European Rail Research Institute.

5.
C. Esveld (1997) Improved knowledge of CWR track, Delft University Press.

6.
K.-C. Lee (2014) Feasibility Analysis of Sliding Slab Track for Reducing Track-Bridge Interaction, Proceedings of 2014 Spring Conference of the Korean Society for Railway, pp.916-920.

7.
M.-C. Kim, Y.-H. Bae, and Y.-G. Park (2014) Experimental Study on the Improvement Measures of Ballasted Tracks Considering the Speed-up of Conventional Lines, Proceedings of 2014 Spring Conference of the Korean Society for Railway, pp.1669-1676.