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A Multi-linear Fatigue Life Model of Flexible Pavements under Multiple Axle Loadings

  • Farah Homsi
  • Didier Bodin
  • Denys Breysse
  • Sylvie Yotte
  • Jean-Maurice Balay
Part of the RILEM Bookseries book series (RILEM, volume 4)

Abstract

The fatigue damage of a pavement under repeated traffic loadings is a key issue for pavement design. At the material scale, the fatigue performance of asphalt mixtures can be assessed with laboratory tests. The standard fatigue test consists of the application of a continuous sinusoidal signal on the specimens and enables to write the fatigue life as a function of the strain level. Real loadings are more complex. Additional parameters may therefore have an influence on the fatigue life of bituminous mixtures. A methodology for a better calculation of the fatigue life of asphalt pavements is developed. It couples a structural approach and a material-based approach. This paper presents the material-based approach of the methodology. A database of laboratory fatigue tests with complex loadings has been built. An experimental plan whose variables are the independent shape parameters characterising a loading signal is defined and the synthetic complex loading signals constructed. The results of the fatigue tests enabled the calibration of a multi-linear fatigue model where the fatigue life is a function of the independent shape parameters characterizing the loading signal. Coupling the multi-linear fatigue model with a pavement model enables the calculation of the fatigue life of a pavement under different loading conditions.

Keywords

Fatigue Life Fatigue Test Asphalt Mixture Asphalt Pavement Pavement Design 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© RILEM 2012 2012

Authors and Affiliations

  • Farah Homsi
    • 1
    • 2
  • Didier Bodin
    • 3
  • Denys Breysse
    • 2
  • Sylvie Yotte
    • 2
  • Jean-Maurice Balay
    • 1
  1. 1.Université Nantes Angers Le Mans, IFSTTARBouguenais cedexFrance
  2. 2.Département Génie Civil et Environnement (GCE)Université Bordeaux 1, I2M UMR CNRS 5295Talence cedexFrance
  3. 3.ARRB Group LtdVermont SouthAustralia

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