STRUCTURAL ANALYSIS OF AASHO ROAD TEST FLEXIBLE PAVEMENTS FOR PERFORMANCE EVALUATION

The structural analysis of American Association of State Highway Officials (AASHO) Road Test flexible pavements was performed for the specific purpose of developing a pavement performance model that would be implemented in a pavement management system used by the U.S. Forest Service. For this reason, a precise and highly sophisticated structural evaluation was not made. However, it was determined that the nonlinear elastic properties of unbound pavement materials and seasonal material conditions should be characterized. The use of a thin layer BISAR elastic-layer analysis helped to overcome difficulties in the structural analysis associated with the PSAD2A elastic-layer program. An equivalent layer procedure was found to give results similar to the thin layer BISAR analysis. A modified BISAR program was developed that incorporated the equivalent layer procedure and was used in the structural analysis of the AASHO Road Test pavements. Results of the analysis showed that predicted pavement deflections from the structural analysis compared very well with spring and fall deflection measurements taken at the AASHO Road Test. An evaluation of the modulus ratios of adjacent unbound pavement layers led to the conclusion that the modulus ratios are not fixed within a narrow range of values but can vary significantly depending on the state of stress in the pavement layers. (Author)

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1982/888/888-009.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=STRUCTURAL+ANALYSIS+OF+AASHO+ROAD+TEST+FLEXIBLE+PAVEMENTS+FOR+PERFORMANCE+EVALUATION&author=D.+Luhr&author=B.+McCullough&publication_year=1982
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• 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:
  • Luhr, David R
  • McCullough, B Frank
• Publication Date: 1982

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 63-69
• Monograph Title: Structural performance of pavement systems
• Serial:
  • Transportation Research Record
  • Issue Number: 888
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Deflection; Elasticity (Mechanics); Flexible pavements; Modulus of elasticity; Nonlinear systems; Pavement performance; Pavements; Stresses; Structural analysis
• Uncontrolled Terms: Nonlinearity
• Old TRIS Terms: Pavement deflection
• Subject Areas: Highways; Materials; Pavements; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00372932
• Record Type: Publication
• ISBN: 0309035007
• Files: TRIS, TRB
• Created Date: May 31 1983 12:00AM