EFFECT OF FOUNDATION STIFFNESS ON TRACK BUCKLING
The present paper deals with the effect of releasing the constraining assumption of using an infinitely rigid foundation in the analysis of vertical buckling of a railroad track due to constrained thermal expansion. The chosen foundation is of the Winkler type. The buckled configuration is assumed to consist of two regions, i.e., a lift-off region and an attached region. The foundation resistance to the longitudinal displacement of the track is assumed to be linear. The problem is treated as a variational problem with variable end points for which the variational formulation yields a consistent set of differential equations and boundary conditions. It is found that a decrease in the foundation stiffness will increase the "safe buckling temperature." However, for the working range of an actual foundation, this increase is small and the assumption of an infinitely rigid base can be used to predict a close lower bound for the "safe buckling temperature."
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
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Corporate Authors:
American Society of Civil Engineers
345 East 47th Street
New York, NY United States 10017-2398 -
Authors:
- El-Aini, Y M
- Publication Date: 1976-6
Media Info
- Pagination: p. 531-545
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Serial:
- Journal of Engineering Mechanics
- Volume: 102
- Issue Number: EM3
- Publisher: American Society of Civil Engineers
- ISSN: 0733-9399
- EISSN: 1943-7889
- Serial URL: http://ascelibrary.org/journal/jenmdt
Subject/Index Terms
- TRT Terms: Buckling; High temperature; Pavement subgrade; Railroad tracks; Stabilized materials; Thermal stresses; Track ballast; Welded rail
- Uncontrolled Terms: Thermal effects
- Old TRIS Terms: Ballast stabilization; Track structures
- Subject Areas: Geotechnology; Railroads;
Filing Info
- Accession Number: 00139488
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: No. 12216 Proc Paper
- Files: TRIS
- Created Date: Oct 26 1976 12:00AM