PERMANENT DEFORMATION IN A LINEAR VISCO-ELASTIC MODEL OF A ROAD PAVEMENT

The deformation of an idealised pavement composed of linear visco-elastic materials subject to a pulse load is analysed as a means of assessing the reliability of an approximate method of computing the permanent displacement of the surface of a pavement, based on the use of independently computed stresses in association with measured deformation properties. It is shown that, in the linear visco-elastic system, the permanent deformation is independent of the elastic properties of the materials, and depends only on their viscous properties, and that the permanent deformation in such a pavement model can be computed using an 'elastic' program supplied with values of the deformation parameters rather than the elastic constants. The results given by the visco-elastic analysis and by the approximate method in few cases are compared. In absolute terms, the approximate method seems unreliable, but it may give a reasonably reliable assessment of the relative performance of pavements. (A) /TRRL/

  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Thrower, E N
  • Publication Date: 1975

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00134335
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: TRRL SR 184UC
  • Files: ITRD, TRIS, ATRI
  • Created Date: Oct 6 1976 12:00AM