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Materials and Structures

, Volume 46, Issue 4, pp 683–696 | Cite as

Evaluation of the structure-induced rolling resistance (SRR) for pavements including viscoelastic material layers

Original Article

Abstract

This article addresses the question of whether the viscoelastic behavior of asphalt pavements, as part of the factors that impact the rolling resistance, might lead to substantially higher energy consumption of road traffic, as compared to non-dissipative pavements. In the context of sustainable development (fuel consumption, gas emission), this is a current issue for the pavement design community. This problem is tackled by a theoretical approach which consists in computing the structure-induced rolling resistance (SRR) for a vehicle by using the mechanical response of a layered viscoelastic medium excited by moving loads (i.e. tires of the vehicle). The structure-induced power dissipation is shown to be proportional to the integral over contours of the applied loads of the pavement deflection, times the outward normal to these contours. Following the developed approach, the determination of the SRR force engendered by the structure-induced dissipation is obtained from the computation of the deflection of the viscoelastic pavement to an assumed pressure distribution. Such an approach applied to a thick asphalt pavement allows the SRR for a typical road structure to be evaluated as a function of temperature and speed. A non-dimensional analysis is also presented to extend the results to some other contexts. Under the assumptions made for the derivation of the SRR, the main conclusion of the case study is that the extra fuel consumption for a vehicle resulting from the viscoelastic behavior of asphalt pavements is small.

Keywords

Rolling resistance Moving load Viscoelasticity Layered medium Asphalt pavement 

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Copyright information

© RILEM 2012

Authors and Affiliations

  1. 1.LUNAM Université, IFSTTAR, IM, StructuresBouguenaisFrance

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