Viscoroute 2.0: a tool for the simulation of moving load effects on asphalt pavement

As shown by strains measured on full scale experimental aircraft structures, traffic of slow-moving multiple loads leads to asymmetric transverse strains that can be higher than longitudinal strains at the bottom of asphalt pavement layers. To analyze this effect, a model and a software called ViscoRoute have been developed. In these tools, the structure is represented by a multilayered half-space, the thermo-viscoelastic behaviour of asphalt layers is accounted by the Huet-Sayegh rheological law and loads are assumed to move at constant speed. First, the paper presents a comparison of results obtained with ViscoRoute to results stemming from the specialized literature. For thick asphalt pavement and several configurations of moving loads, other ViscoRoute simulations confirm that it is necessary to incorporate viscoelastic effects in the modelling to well predict the pavement behaviour and to anticipate possible damages in the structure.Comment: 27 pages

The LCPC's ALT facility contribution to pavement cracking knowledge

International audienceThe full scale observation of damage and failure mechanisms of pavements dueto traffic is quite essential for the improvement of road materials and construction methods, aswell as for the development and the validation of modelling tools and pavement design methods.An alternative to the survey of real roads over long periods consists in performing acceleratedpavement tests (APT). LCPC has today more than 20 years of experience in APT applied to studyof pavement deterioration and cracking. Since 2006, in relation with an LCPC research programto update the French pavement design method, a detailed analysis of existing data of LCPC APTtests is being carried out. The objective of this work is to improve the understanding and modellingof the development of rutting and fatigue in different types of pavements. This paper presents thefirst conclusions of this synthesis, in relation to fatigue cracking, for the purpose of the RILEMTechnical Committee – Cracking in Asphalt Pavements (TC-CAP)

The LCPC's ALT facility contribution to pavement cracking knowledge

International audienceThe full scale observation of damage and failure mechanisms of pavements dueto traffic is quite essential for the improvement of road materials and construction methods, aswell as for the development and the validation of modelling tools and pavement design methods.An alternative to the survey of real roads over long periods consists in performing acceleratedpavement tests (APT). LCPC has today more than 20 years of experience in APT applied to studyof pavement deterioration and cracking. Since 2006, in relation with an LCPC research programto update the French pavement design method, a detailed analysis of existing data of LCPC APTtests is being carried out. The objective of this work is to improve the understanding and modellingof the development of rutting and fatigue in different types of pavements. This paper presents thefirst conclusions of this synthesis, in relation to fatigue cracking, for the purpose of the RILEMTechnical Committee – Cracking in Asphalt Pavements (TC-CAP)