Next Generation Foundations for Special Trackwork – Phase I
This report reviews the dynamic load environment and failure modes of special trackwork frog foundations. Key measurements taken under a 39,000-pound wheel load traffic at the Facility for Accelerated Service Testing were used to develop and calibrate a vehicle-track model. Parametric studies show the following: (1) for new crossings without any track differential settlement, optimal foundation stiffness and damping could lower the current wheel-rail (W-R) impact by 30 percent, (2) for worn crossings, W-R impact increases significantly with foundation stiffness and damping; and (3) W-R impact increases with track differential settlement. On the basis of the modeling results, this report proposes preliminary design and maintenance guidelines for improving crossing performances.
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Availability:
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Corporate Authors:
Transportation Technology Center, Incorporated
55500 DOT Road
Pueblo, CO United States 81001Federal Railroad Administration
Office of Research and Development, 1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Shu, Xinggao
- Davis, David
- Akhtar, Muhammad
- Publication Date: 2013-2
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
- Pagination: 58p
Subject/Index Terms
- TRT Terms: Ballast (Railroads); Design; Dynamic loads; Failure; Frogs (Railroads); Guidelines; Maintenance of way; Parametric analysis; Rolling contact
- Identifier Terms: Next Generation Train
- Uncontrolled Terms: Special trackwork
- Subject Areas: Design; Maintenance and Preservation; Railroads; I22: Design of Pavements, Railways and Guideways; I60: Maintenance;
Filing Info
- Accession Number: 01491686
- Record Type: Publication
- Report/Paper Numbers: DOT/FRA/ORD-13/10, Funding number: DTFR53-00-C-00012, Task Order 265
- Files: TRIS, USDOT
- Created Date: Sep 3 2013 12:28PM