Student | Chamindi Jayasuriya | Materials and Manufacturing - RMCRC
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16 Jun Student | Chamindi Jayasuriya | Materials and Manufacturing

Posted at 03:47h in Durability, Modelling and Algorithms, Students by
PhD students

Chamindi Jayasuriya

University of Wollongong

PhD topic – Performance of recycled rubber inclusions for improved stability of railways

Chamindi Jayasuriya

Research summary

This project investigated the use of different matting materials underneath the rail ballast. Traditionally, ballast made of stone can easily degrade through constant use, so adding matting underneath may provide a more stable, cushioned ride that requires less maintenance. This research involves testing the performance of the matting by simulating rail loading and vibration in the lab.

Completion date

March 2019

Key achievements

  • Developed a novel analytical model for the use of elastic inclusion in railway track substructure to improve track performances under dynamic loading.
  • Investigation of the effect of the presence of USP in ballasted tracks using large-scale triaxial tests.
  • Numerically simulated the performance of USP stabilised ballasted track under dynamic load using the ABAQUS finite element package.
  • Developed a generalised ballast-geogrid interaction model to capture particle degradation and vibrations during dynamic loading.

Awards

  • Young Geotechnical Engineer Best Paper award: International Symposium on Geotechnics of Transportation Infrastructure (ISGTI 2018)
  • Buddhima Indraratna Award for Industry Engagement: Based on student research impact and engagement with industry practice in the field of civil engineering in 2017
  • IESL NSW Chapter Engineering Excellence Award (2018) in Best Paper Published Category
  • Young Geotechnical Professionals Awards (Australian Geomechanics Society) (2018): 3rd Place
  • First Place in Three Minutes Thesis competition – Center for Geotechnical Science and Engineering Workshop 2015 (Perth, Australia)
  • First Place in Three Minutes Thesis competition – School for Civil, Mining and Environmental Engineering 2016
  • First Place in Three Minutes Thesis competition – School for Civil, Mining and Environmental Engineering 2017

Publications

Jayasuriya, C., Indraratna, B. and Bessa Ferreira, F. 2018. The Use of Under Sleeper Pads to Improve the Performance of Rail Tracks. Proceedings of the International Symposium on Geotechnics of Transportation Infrastructure (ISGTI 2018) (pp. 474-474). Delhi, India

Jayasuriya, C., Indraratna, B. and Ferreira, F. The Use of Under Sleeper Pads to Improve the Performance of Rail Tracks 2020. Indian Geotechnical Journal, DOI: 1007/s40098-020-00418-2.

Jayasuriya, C, Indraratna, B. and Ngo, T. 2019. Experimental Study to Examine the Role of Under Sleeper Pads for Improved Performance of Ballast under Cyclic Loading, Transportation Geotechnics, vol. 19, pp. 61-7

Indraratna, B., Qi, Y., Jayasuriya C., Heitor A. and Navaratnarajah, S. Use of rubber tyre elements in track stabilization. Invited keynote paper for 15th International Conference on Geotechnical Engineering, 2019. Lahore, Pakistan.

Jayasuriya, C., Indraratna, B. and Rujikiatkarmjorn, C. 2020. Application of elastic inclusions to improve ballasted track performances. Geo-Congress, Minnesota, USA.

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