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http://dx.doi.org/10.7782/JKSR.2016.19.5.638

Experimental Study of Characteristics of Longitudinal Resistance Behavior of Fasteners in Concrete Track on Bridges  

Yun, Kyung-Min (Chungnam National University Rail Research Institute)
Park, Beom-Ho (Department of Civil Engineering, Chungnam National University)
Min, Kyung-Hwan (Chungnam National University Rail Research Institute)
Lim, Nam-Hyoung (Department of Civil Engineering, Chungnam National University)
Publication Information
Journal of the Korean Society for Railway / v.19, no.5, 2016 , pp. 638-646 More about this Journal
Abstract
CWR (continuous welded rail) tracks on high-speed railway bridges have much more complicated axial force distributions caused by track-bridge interaction than those behaviors on embankments, and additional problems caused by track-structure interaction with the axial force of the CWR. In order to analyze and limit other physical phenomena caused by track-bridge interaction, a design guideline (KR C-08080, longitudinal track-bridge interaction analysis) is used when designing CWR track on bridges. Domestic analysis and design methods for track-bridge interaction follow the UIC 774-3R, and they suggest conservative methods and deterministic properties. Recently, many studies analyzing the methods of track-bridge interaction considering the loading history are being carried out; however, there has been insufficient studies of the variation of the resistance properties with a consideration of the actual loading history. In this study, the performances of rail fastening systems used for concrete track on bridges were tested and analyzed while considering the loading history. For this purpose, longitudinal and vertical loading combinations, applied in order to simulate the practical conditions and resistance characteristics (stiffness and elastic limit displacement), are analyzed through the experimental results. Also, a comparison study was conducted with the properties in the KR Code.
Keywords
Continuous welded rail (CWR); Track-bridge interaction; Concrete track; Fastening system; Loading history;
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