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The longitudinal resistance of a railway track is one of the most important factors indicating the track-bridge interaction (TBI). However, it is difficult to consider the actual resistance of an installed fastening system of a rail because the longitudinal resistance of the concrete track on the bridge for analyzing TBI is presented as a single resistance-displacement curve in design standards. In this study, the resistance that can satisfy the design requirements from the point of view of safety was calculated through experiments of the fastening system of rails. For this purpose, laboratory experiments were performed, and it was confirmed that the resisting force increases linearly with the vertical load. Further, the confidence interval of the resistance was calculated by establishing a relation that accounts for the increase in resistance due to the vertical load. Moreover, the TBI analysis was performed considering the resistance within the confidence interval, and the results were analyzed. It is thus confirmed that safe design is possible when the upper limit of the resistance value used is within the confidence interval.

Estimation of Longitudinal Resistance of Concrete Tracks on Bridge Considering Longitudinal Resistance Characteristics of Rail Fastening System