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)


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.


Fatigue Life Fatigue Test Asphalt Mixture Asphalt Pavement Pavement Design 
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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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