An investigation of the irrecoverable strain response in an experimental pavement at griffith, NSW

Permanent or irrecoverable strain in flexible pavements is a major mechanism of failure in Australian pavements. Numerous research workers have investigated the permanent strain response of materials in laboratory specimens, eg, repeated load triaxial specimens. However, there does not appear to be an acceptable model for characterising the permanent strain response of pavement and subgrade materials. This paper presents a model for the moisture and stress dependent permanent strain relationships of these materials using hyperbolic functions suitable for inclusion in routine finite element analyses. The application of this model to the gravel section of an experimental road near griffith, NSW, was compared with the observed response, and used to demonstrate the influence of wheel load, the number of repetitions of load and the suction in the subgrade on the irrecoverable response of this pavement. (a)


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  • Accession Number: 01439445
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 10:19PM