The behavior of a system containing a number of homogeneous, isotropic linear-elastic layers is analyzed using a linear fictional model to simulate the real behavior at the interfaces. The results of the computations emphasize the influence of the interface condition on the stress distribution and hence on the design of pavements. In flexible pavements, the radial stress is strongly affected by the interface condition. The vertical stress and the deflection bowl are also affected, but to a smaller extent. Since the rational design of flexible pavements is based on the radial stress or strain at the bottom of the asphalt-concrete layer and on the vertical stress or strain at the top of the subgrade, the determination and use in design of the modulus of resistance to displacement between different layers should improve the design system and make it more realistic. In rigid pavement overlays also, the condition of the interface between the existing and the new surface is important. In the case analyzed, the partial bond (as defined by the Corps of Engineers) corresponds to a large value of the modulus of resistance to displacement. Since the existence of such a large value is questionable, the determination of realistic values will make the design of overlays more rational.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 71-73
  • Monograph Title: Soil mechanics: rutting in asphalt pavements, embankments on varved clays and foundations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00163002
  • Record Type: Publication
  • ISBN: 0309025958
  • Files: TRIS, TRB
  • Created Date: Oct 13 1977 12:00AM