Abstract
In this paper, the measured and predicted responses between a full-scale accelerated pavement test facility and that from a three-dimensional (3D) finite element model were compared using the measured 3D tire contact stresses. The objective was to predict pavement response in asphalt mixture layers using the measured 3D tire contact stresses and compare with the measured transverse strains in August and November. To carry out this objective, the transverse strains within asphalt layers were measured and the corresponding strains were predicted by 3D finite element analysis. Additionally, a layered elastic analysis, the BISAR program, was used to predict the corresponding field measurements. The predicted transverse strains by 3D finite element analysis were matched reasonably with the measured strains.
Highlights
As high speed computers have evolved and researchers in the area of pavement performance have become increasingly interested in the simulation of more realistic pavement structures and loading conditions, interest in the modelling of pavement structures by finite element methods (FEM) has rapidly grown
Vehicle speed showed no significant effects on pavement response for the conditions under which the measurements were collected in this study
For comparisons of transverse strains measured at ASG6 in August, the predicted transverse strains by 3D FE analysis showed the similar results in terms of quantity and trend to the measured results
Summary
As high speed computers have evolved and researchers in the area of pavement performance have become increasingly interested in the simulation of more realistic pavement structures and loading conditions, interest in the modelling of pavement structures by finite element methods (FEM) has rapidly grown. Multilayer elastic theory (MLET) solutions, finite element (FE) analysis, and analysis using the VESYS 5W program were used for the predictions of the primary responses. The predicted responses included the horizontal tensile stress and strain for the fatigue mode at the bottom of the hot mix asphalt layer and the vertical compressive stresses and strain on the top of each pavement layer on the rutting mode. Their solutions of the MLET that used a linear elastic base and the VESYS 5W programs have provided reasonable predictions that are comparable with measured tensile strains and permanent vertical deformations
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