What is it about?
We subject a concrete sleeper to a number of lateral impact loads by a previously developed apparatus namely pendulum loading test device (PLTD) to understand the behavioural mechanisms existing between its three difference surfaces (base, sides and end) and their adjacent ballast layer under lateral impact loading conditions.
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Why is it important?
High-speed trains era has arrived for a significant amount of time, and so should the designs and analyses. Quasi-static look at train-track interaction seems to have no meaning anymore. In this study, we present an impact factor for train lateral loads in terms of axle-load and speed up to 300 km/h, which is based on the dynamic friction coefficient between ballast layer and both base & sides of concrete sleeper. We also calculates dynamic lateral resistance for each contact surface of sleeper, leading to their contribution into providing the resistance required.
Perspectives
The most delightful week of my life (research-wise) was working on this paper! Revelations (to me) were very interesting and amusing. This research is definitely extendable to many interesting topics, and I can't wait to see others benefit from it in their works.
Mr Ahmad Hosseini
Iran University of Science and Technology
Read the Original
This page is a summary of: Effect of different contact surfaces between concrete sleeper and ballast on mobilized lateral resistance against impact loads, Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit, March 2016, SAGE Publications,
DOI: 10.1177/0954409716636924.
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