Finite Elements Modelling of Flexible Pavements with the Shakedown Concept

ABSTRACT A simplified method has been developed for the finite elements modelling of flexible pavements ruts. This method is based on the shakedown theory established by Zarka for steel. The yield surface of Drucker Prager and the plastic potential of Von Mises have been used. The simplified method determines straightforwardly the purely elastic state or the elastic shakedown state or the plastic shakedown state. The simplified method has been calibrated with two unbound granular materials tested under repeated loads triaxial tests. Then, a finite element modelling of a flexible pavement has been carried out. A parametric study has been performed with pavement layers thickness, which underlines the capacity of the model to take their influence on the rut depth into account.

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