AN IMPROVED ANALYSIS OF RAIL STRESSES AND RAIL-TIE CONTACT FORCES, FOR A CROSS-TIE TRACK
Presently, the dominant method for calculating rail stresses and rail-tie contact forces is based on the model of a beam on a Winkler base. One shortcoming of this analysis is that it neglects the effect of the moments which the ties exert on the rails, since when the rails deflect in the vertical plane the cross-ties in addition to displacing vertically also rotate about their axes and the ballast resists these rotations. The paper presents an improved analysis of this problem. It also suggests a simple method for the determination of the track parameters which enter the analysis and demonstrates its use on actual track test data. Paper concludes with a comparison of analytical and track test data, in order to establish the accuracy of the proposed analysis.
- Sponsored in part by Association of American Railroads, Chicago, IL. Technical Center.
Princeton UniversityDepartment of Civil Engineering
Princeton, NJ United States 08450
Chicago, IL United States 60616
National Science FoundationDivision of Engineering, 1800 G Street, NW
Washington, DC United States 20550
- Kerr, A D
- Publication Date: 1978-1
- Pagination: 19 p.
- TRT Terms: Ballast (Railroads); Bending; Bending stress; Deflection; Deformation; Kinetics; Loads; Mathematical models; Mechanical properties; Motor reactions; Rail (Railroads); Railroad ties; Railroad tracks; Stresses; Structural analysis; Validation
- Old TRIS Terms: Ballast mechanics; Rail stress; Reaction kinetics; Track deflection; Track structures
- Subject Areas: Geotechnology; Materials; Railroads; Safety and Human Factors;
- Accession Number: 00198594
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: 78-TR-1
- Contract Numbers: NSF-ENG77-09156
- Files: TRIS
- Created Date: Oct 17 1979 12:00AM