MECHANICAL BEHAVIOUR OF SOILS AND UNBOUND GRANULAR MATERIALS, MODELLING OF FLEXIBLE PAVEMENTS - RECENT ADVANCES

Different European Laboratories (Administration, Universities) were awarded a laboratory twining project between 1990 and 1993, under the "Science" programme, which closure has taken place with Euroflex '93 Symposium (Lisbon, 1993). This research aims to harmonise and develop rational procedures to take into account the mechanical characteristics of soils and unbound granular materials, to apply to the design of flexible pavement structures. A round-robin test programme for unbound granular materials carried out by different laboratories enables to establish reliable test procedures for characterisation of elastic and plastic behaviours of these materials. The procedure for elastic behaviour is summarised in this paper. Concerning the modelling of flexible pavement structures, the behaviour of unbound granular materials was described by a nonlinear elastic constitutive law (Boyce), with which a classic plasticity criterion was added (Drucker-Prager) in order to give a stress field in the material compatible with its strength. This model was implemented in FEM codes: CESAR LCPC-2D and 3D, and Noel 8-2D of the University of Nantes. The results of FEM-2D (single wheel) and FEM-3D (dual wheel) calculations realised for most representative flexible pavement structures are presented.

• Supplemental Notes:
  • This conference was arranged by the International Society for Asphalt Pavements. The ninth conference will be held in Copenhagen, Denmark in August 2002.
• Corporate Authors:

  University of Washington, Seattle

  Department of Civil and Environmental Engineering, P.O. Box 352700
  Seattle, WA  United States  98195-2700
• Authors:
  • Balay, J
  • Correia, A G
  • Jouve, P
  • Hornych, P
  • Paute, J-L
• Conference:
  • Eighth International Conference on Asphalt Pavements
  • Location: Seattle, Washington
  • Date: 1997-8-10 to 1997-8-14
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 823-842

Subject/Index Terms

• TRT Terms: Elastoplasticity; Finite element method; Flexible pavements; Granular materials; Laboratory tests; Mathematical models; Mechanical properties; Soils; Subgrade (Pavements)
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00764695
• Record Type: Publication
• Report/Paper Numbers: Volume I
• Files: TRIS, ATRI
• Created Date: Jun 11 1999 12:00AM