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.

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 14-29
  • Monograph Title: Asphalt concrete pavement design and evaluation
  • Serial:

Subject/Index Terms

Filing Info

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