ELASTIC LAYER ANALYSIS RELATED TO PERFORMANCE IN FLEXIBLE PAVEMENT DESIGN

From experience in Ontario with flexible pavements and from results of the AASHO Road Test, it was found that the calculated subgrade deflection under a standard wheel load is the best indicator of performance of the pavement as a whole when it is compared with other stress, strain, and deformation values calculated by elastic layer theory. In the calculations, layer equivalencies obtained from experience and variations in subgrades were expressed in terms of elastic moduli. Subgrade deflections can be calculated more simply by using Odemark's concept of equivalent layer thickness. Expressions for load equivalency factors were derived from AASHO Road Test data by using this simplified deflection calculation. Finally, a functional relationship between subgrade deflection, number of standard load applications, and present serviceability index was established. The findings constitute major parts of a design subsystem to be used within a management system for flexible pavements.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1974/521/521-002.pdf
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=ELASTIC+LAYER+ANALYSIS+RELATED+TO+PERFORMANCE+IN+FLEXIBLE+PAVEMENT+DESIGN&author=F.+Jung&author=W.+Phang&publication_year=1974
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Flexible Pavement Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Jung, Friedrich W
  • Phang, William A
• Conference:
  • 53rd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1974-1-21 to 1974-1-25
• Publication Date: 1974

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 14-29
• Monograph Title: Asphalt concrete pavement design and evaluation
• Serial:
  • Transportation Research Record
  • Issue Number: 521
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Deflection; Flexible pavements; Mechanical elasticity; Pavement design; Pavement performance; Pavements; Serviceability; Subgrade (Pavements); Traffic equivalence factor; Wheel loads
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Serviceability Index
• Old TRIS Terms: Elastic theory; Equivelency factors; Layered theories; Pavement deflection
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 00095729
• Record Type: Publication
• ISBN: 0309023661
• Files: TRIS, TRB
• Created Date: Jul 2 1975 12:00AM