Simplified models for estimating stresses and strains in pavements both on concrete and steel bridges are presented in this paper. These models represent a very useful tool for a faster prediction of structural behavior of pavements at a preliminary design level.The simplified model proposed for asphalt pavements on concrete bridges can be identified in the elastic multilayer system, which is represented by the layers of the pavement and waterproofing supported by a rigid half-space (concrete deck). The results obtained show that the validity field of this model is influenced by the thickness and dynamic modulus of the pavement, as well as the stiffness of the waterproofing. The model developed for the asphalt pavements on steel bridges, instead, can be identified in a small-scale model, compared to the full-scale bridge, which is represented with a supported continuous plate composed by the pavement, waterproofing, and steel deck. In keeping with the international literature, similar models for steel bridges have been validated in laboratory by reduced-scale tests, as a result the author is confident that the model proposed also permits to estimate accurately enough the stresses and strains.
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