01750933

Component

https://doi.org/10.1177/0361198120937962

This paper details a linear-elastic approach to modeling crosstie-ballast interfacial load distribution in a railroad timber crosstie trackbed using RISA 3D, a finite element modeling software. RISA results closely mirrored experimental findings with some slight deviation as discussed in the paper. The modeling methodology outlined here advances previous trackbed research at the University of Kentucky, U.S., and could be used in future trackbed finite element analyses for design or research in load path distribution and load magnitude predictability. This paper details the approach used to model a timber crosstie trackbed superstructure, including initial troubleshooting stages, and explains the derivation of program input variables. A sensitivity analysis performed on the main model determined the workable extent of linearity. The analysis also examined the effect of a poor/muddy trackbed support loading condition. The paper concludes with potential recommendations in relation to the work.

The authors confirm that the necessary data supporting the findings of this study are available within this paper. © National Academy of Sciences: Transportation Research Board 2020.

English

pp 76-86

2020-11

Transportation Research Record: Journal of the Transportation Research Board

Web

References (10)

Ballast (Railroads); Finite element method; Linear elasticity; Load transfer; Mathematical models; Railroad ties; Railroad tracks; Timber

Design; Railroads

TRIS, TRB, ATRI

Aug 22 2020 3:04PM