Investigating the Behavior of Railway Short Panels Under Lateral Impact Loading: A Laboratory Study

A number of lateral impact tests were performed on two short panels with five and seven concrete sleepers, using a specific apparatus called pendulum loading test device (PLTD). In order to monitor the performance of panels under the exerted lateral impact loads, a comprehensive measurement setup was adopted for both panel and PLTD hammer. Subsequently, the contact force, inertia force and lateral displacement of each sleeper were recorded. The experimental results disclosed that a maximum number of five sleepers participated in the lateral load bearing process, each of which had the average contribution of 46, 17, 17, 11 and 9 % to the total lateral force. Moreover, it was revealed that 60 and 40 % of the total lateral resistance mobilized by the panel against lateral impact loads were provided by panel-ballast interaction and the panel inertia force, respectively. Furthermore, the dynamic lateral resistance (DLR) of panel, which is representative of the maximum panel-ballast interaction force, was found to be a function of contact force with a maximum value in the vicinity of 21 kN, and it was almost equal to its static lateral resistance (SLR).

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