Track maintenance life is a complex function of many factors. This report is concerned with a study to define a theoretical model for predicting track settlement under dynamic load, which is applicable to estimating maintenance life for railroad track structures. The behavior of each component of the track system is described to represent the progressive permanent settlement under vehicle loading. Ballast, subballast and subgrade materials are considered to be the primary components contributing to the permanent settlement. Test procedures and apparatus have been developed for determining the required properties. An evaluation of the available computer models for track analysis is made by validating their predictions with field measurements obtained from the FAST site in Colorado. Methods of predicting permanent deformation under repeated loading are reviewed, and a method which accounts for stress path is proposed.

  • Corporate Authors:

    State University of New York, Buffalo

    Department of Civil Engineering
    Buffalo, NY  United States  14260

    Department of Transportation

    Office of University Research, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Selig, E T
    • Chang, C S
    • Adegoke, C W
    • Alva-Hurtado, J E
  • Publication Date: 1979-8

Media Info

  • Pagination: 199 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00304715
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT/RSPA/DPB-50/7922Final Rpt.
  • Contract Numbers: DOT-OS-70058
  • Files: NTIS, TRIS, USDOT
  • Created Date: Jan 15 1980 12:00AM