EQUIVALENCY FACTOR DEVELOPMENT FOR MULTIPLE AXLE CONFIGURATIONS

Through the analysis of AASHO pavements a fundamental relationship is developed between subgrade compressive strain and equivalency factor. Other elements such as tensile strain in the surface and deflection were examined, but the best relationship evolved when the subgrade compressive strain was used. Once the basic relation of equivalency factor and strain is developed, the equivalency factors for axle configurations other than single and tandem can be computed over a wide range of loads. The elastic-layered theory was used for computing strain. The computed results were compared to extrapolations of the AASHO equations used to compute equivalency factors. These comparisons were good in some instances; in others, they were not. The equivalency-factor concept can be extended to new size and weight configurations of highway vehicles. Thus it will be possible to include these new loads in both new and rehabilitative pavement design procedures that use the concept of equivalent loadings. (Author)

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1983/949/949-005.pdf
• Summary URL:
  https://scholar.google.com/scholar_lookup?title=EQUIVALENCY+FACTOR+DEVELOPMENT+FOR+MULTIPLE+AXLE+CONFIGURATIONS&author=H.+Treybig&publication_year=1983
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/636690782
• Supplemental Notes:
  • 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. Publication of this paper sponsored by Committee on Flexible Pavements.
• Corporate Authors:

  Transportation Research Board

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  Washington, DC  United States  20001
• Authors:
  • Treybig, Harvey J
• Conference:
  • 62nd Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1983-1-17 to 1983-1-21
• Publication Date: 1983

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 32-44
• Monograph Title: PAVEMENTS: DESIGNS FOR HEAVY VEHICLES, COMPUTER SIMULATIONS AND GEOGRID REINFORCEMENTS
• Serial:
  • Transportation Research Record
  • Issue Number: 949
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Axle load force; Compression; Deflection; Heavy vehicles; Pavement design; Pavements; Subgrade (Pavements); Tension; Traffic equivalence factor
• Old TRIS Terms: Pavement deflection
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00389560
• Record Type: Publication
• ISBN: 0309036704
• Files: TRIS, TRB
• Created Date: Nov 30 1984 12:00AM