A study on the effect of poro-visco-elasticity on the mechanical properties of pavement structure determined by Falling Weight Deflectometer Test

Ako Bahari, Ahmed Shalaby, Neil Popplewell, Pooneh Maghoul

In the proceedings of: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC

Session: Transportation Geotechnics I

ABSTRACT: Acquiring detailed information about the state of the pavement structures is an important element in rehabilitation planning of sections showing significant damage. The Falling Weight Deflectometer Test (FWD) is a popular Non-Destructive Testing (NDT) technique used to characterize the mechanical properties of a pavement structure. This paper aims to study the effect of poro-visco-elasticity of the pavement structure on the mechanical parameters such as the resilient modulus and structural damping as determined by FWD using a novel dynamic algorithm rather than a quasi-static analysis. For this purpose, a poro-visco-elastic Forward Solver Kernel was developed. The associated forward solver is cross-checked against viscoelastic and elastic limit cases.

RÉSUMÉ: programme de tombante (FWD) est l'une des techniques d'essais non destructifs (NDT) les plus populaires dans la caractérisation des propriétés mécaniques de la structure de la chaussée. Cet article vise à étudier l'effet de poro-visco-élasticité de la structure de la chaussée sur les paramètres mécaniques tels que le module élastique ou réversible ainsi que l'amortissement structurel. Ces paramètres sont déterminés par FWD en utilisant un nouvel algorithme dynamique plutôt qu'une analyse quasi-statique. A cette fin, une solution analytique poro-viscoélastique est utilisée. La solution analytique associée est vérifiée en comparaison avec les solutions viscoélastique et élastique. Finalement, la fonction Green du system est évaluée.

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Cite this article:
Ako Bahari; Ahmed Shalaby; Neil Popplewell; Pooneh Maghoul (2018) A study on the effect of poro-visco-elasticity on the mechanical properties of pavement structure determined by Falling Weight Deflectometer Test in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.

@article{geo2018Paper351,author = Ako Bahari; Ahmed Shalaby; Neil Popplewell; Pooneh Maghoul,title = A study on the effect of poro-visco-elasticity on the mechanical properties of pavement structure determined by Falling Weight Deflectometer Test ,year = 2018}