What is it about?
We subjected three types of railway sleepers to lateral impact loads using a previously developed apparatus, pendulum loading test device (PLTD), in order to gain insight into their performance under such loading conditions. We also conducted static lateral push tests on them in a similar circumstance for comparison purposes.
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Why is it important?
This paper presents an inclusive literature review on lateral resistance phenomenon, whether of a single sleeper, short panel or CWR track. We then compare sleeper-ballast interaction forces, sleeper inertial forces and lateral displacements as functions of lateral impact load among concrete, wooden and steel sleepers. Our findings revealed that wooden sleepers, in a certain domain of lateral impact load, provides higher dynamic lateral resistances compared to concrete sleepers. They also show that steel sleepers in their conventional form are of very low dynamic lateral resistance.
Perspectives
Writing this paper took a toll on me! It relates to lateral impact behaviour of sleepers, yet a reviewer mandated us to extend the literature review and include short panels and CWR tracks as well. It was for the best though I suppose! The laboratory workload was considerable, but nothing is better than having a nice and enthusiast colleague and a good supervisor. I hope that this effort will turn out to be useful for those interested on the topic of track lateral resistance because it is getting more serious day by day since the advent of high-speed trains.
Mr Ahmad Hosseini
Iran University of Science and Technology
Read the Original
This page is a summary of: Comparison of dynamic lateral resistance of railway concrete, wooden and steel sleepers subjected to impact loading, Road Materials and Pavement Design, May 2018, Taylor & Francis,
DOI: 10.1080/14680629.2018.1468804.
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