The use of truck population models for the calculation of pavement design life

This paper presents a mechanistic method to determine the performance of flexible pavements. The traffic is represented by a two-dimensional dynamic model which allows for the statistical variability in model parameters such as spring stiffness and suspension mass. This is achieved through repeated numerical simulations of passing vehicles with randomly generated variability in the model properties. The complete pavement design/assessment model uses a complement of interlinked deterministic models. The pavement is represented using the Method of Equivalent Thickness (MET). This, together with the truck population model, gives a time history of strain in the pavement. A pavement damage model calculates rutting and fatigue damage at each point in the road. These effects are represented through reduced stiffness and permanent deformation. The reduced stiffness is fed back in a cumulative cycle into the pavement model. The permanent deformation is used to revise the road profile for subsequent simulations of the dynamic effect of the next sub-population of trucks. The vehicle population model for the prediction of the dynamic load is one of the key elements in the approach; this paper shows the dynamic load caused by the vehicle population using assumed values of vehicle statistical properties and measured vehicle velocity data collected in France.

Language

  • English

Media Info

  • Pagination: 8p
  • Monograph Title: Loads roads and the information highway: 8th International Symposium on Heavy Vehicle Weights and Dimensions, 14-18 March 2004, Misty Hills Conference Centre, Muldersdrift, Gauteng, South Africa

Subject/Index Terms

Filing Info

  • Accession Number: 01390974
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 1920017305
  • Files: ATRI
  • Created Date: Aug 23 2012 5:10AM