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Communication Dans Un Congrès Année : 2014

Determination of an equivalent elastic system to a multilayer viscoelastic structure: application to the case of thick flexible pavement

Résumé

Bituminous pavements are known to exhibit a thermo-viscoelastic behavior which is strongly dependent on temperature and load velocity. However, for many applications (pavement design, FWG analysis...) it is more convenient to deal with elastic calculations which facilitate parametric studies. But to be accurate such an approximation requires rules defining the right choice of elastic data sets. In this context, this paper presents a method to derive an equivalent elastic system to a multilayer viscoelastic pavement under given conditions of temperature and subject to loads moving at constant speed. Thus, the tool proposed hereafter should ease the elaboration of such rules. This paper explains the proposed method and illustrates its use on the case of a thick flexible pavement. By the way, we reexamine the '10Hz rule' of the French pavement design method within this framework. We recall that this rule assumes that the equivalent modulus of a bituminous layer is approximately equal to the norm of its complex modulus computed at 10Hz and at the temperature of the layer.
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Dates et versions

hal-01358108 , version 1 (15-03-2023)

Identifiants

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Olivier Chupin, Armelle Chabot, Didier Bodin, Jean-Michel Piau. Determination of an equivalent elastic system to a multilayer viscoelastic structure: application to the case of thick flexible pavement. 12th ISAP Conference on Asphalt Pavements, Jun 2014, RALEIGH, United States. pp.797-804, ⟨10.1201/b17219-100⟩. ⟨hal-01358108⟩
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