Investigation of the effect of shoulder properties, axle loads, and tyre pressure on edge failure of thin surfaced granular pavements

A three-dimensional finite elements model and a half-fractional factorial experimental design were made to study five factors, namely, shoulder width, shoulder stiffness, axle load, tyre pressure and pavement thickness. The multilayer elastic solution was carried out using Circly and Everstress software. Linear and non-linear analyses using isotropic and cross-anisotropic material properties were compared to the actual strain measurements carried out at the Transit New Zealand accelerated test track facility (CAPTIF). Three pavement responses were studied: maximum deflection between dual tyres, maximum deflection under the outer wheel load, and compressive strain at the top of the subgrade near the shoulder (300 mm from the centre of the dual). The axle load was the most significant factor affecting the deflection and strain at all locations. The interaction of shoulder stiffness, width and thickness has been shown to significantly affect the pavement response. It is proposed that the results of this research can be used by pavement designers to obtain an indication of the effect of lack of shoulder support on pavement performance.(a)


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  • Accession Number: 01045603
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Apr 5 2007 11:50AM