Stress-strain relations for base course materials under repeated loading

This paper describes the response of granular materials under repeated load triaxial loading. It is demonstrated that the resilient behaviour of the materials is more complex than can be predicted by the Hertzian contact theory. Repeated load triaxial tests with constant confining pressure will always cause yielding with very high resilient modulus values at initial loading stages. On the other hand, tests with cyclic confining pressure do not always start with yielding. The stress-strain characteristic of base course materials is very important in a pavement analysis since it will determine the resilient modulus variation and the stress-strain distribution in a pavement. This is why it is necessary to measure the resilient response correctly and accurately in the laboratory. The use of a simple two-parameter model to characterise the resilient modulus variation is demonstrated and the results indicate its accuracy in predicting the dynamic stress-strain relations. The model can also explain the behaviour of the material in terms of yielding and locking.

• Authors:
  • Nataatmadja, A
• Publication Date: 1994-11

Language

• English

Media Info

• Pagination: 299-308
• Serial:
  • Volume: CE36
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Base course (Pavements); Granular soils; Materials tests; Modulus of deformation; Pavement performance; Repeated loads; Road materials; Stresses; Triaxial shear tests
• ATRI Terms: Basecourse; Granular; Material testing; Modulus; Pavement performance; Repetitive loading; Road materials; Roadbase; Stress; Triaxial test
• Subject Areas: Design; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 01435065
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Aug 24 2012 6:46PM