Track performance modeling under mixed traffic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


The majority US high speed trains are sharing the same track network with freight trains, which will bring different load patterns i.e. different peak loads, speeds, and loading sequence and durations to the current track infrastructure. The change in loading characteristics especially when train is moving at so called "Critical Speeds" may however cause unfavorable track performances, for instance increase in track settlement (both in ballast and the subgrade soil). Effort has been taken in this research to investigate the impact of different load patterns on the track settlement accumulation. A fully coupled dynamic track model consists of a vehicle, rail-tie-ballast "Sandwich" upper structure, and a finite 3D soil substructure model is developed and utilized to obtain the loading pulses and pulse combinations introduced by different traffic patterns. A Discrete Element Modeling approach is then employed to simulate the ballast settlement under those realistic loading pulses and pulse combinations. Results and conclusions will be highlighted and recommendations will be made in the end.

Original languageEnglish (US)
Title of host publication2012 Joint Rail Conference, JRC 2012
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages6
ISBN (Print)9780791844656
StatePublished - 2012
Event2012 Joint Rail Conference, JRC 2012 - Philadelphia, PA, United States
Duration: Apr 17 2012Apr 19 2012

Publication series

Name2012 Joint Rail Conference, JRC 2012


Other2012 Joint Rail Conference, JRC 2012
Country/TerritoryUnited States
CityPhiladelphia, PA

All Science Journal Classification (ASJC) codes

  • Transportation


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