EFFECTS OF TRUCK TIRE CONTACT PRESSURE DISTRIBUTION ON THE DESIGN OF FLEXIBLE PAVEMENTS: A THREE-DIMENSIONAL FINITE ELEMENT APPROACH
The objective of the study reported in this paper was to investigate the effect of high inflation pressure and heavy axle load on asphalt-concrete pavement performance by using a three-dimensional finite element model instead of an elastic layer model, which is commonly used for pavement design. The flexible pavement finite element analysis was conducted with both an experimental nonuniform pressure model and a uniform pressure model as input to the program TEXGAP-3D. The results show that (a) the uniform pressure model overestimated the increase in tensile strain at the bottom of the surface for overinflated tires and underestimated the increase in tensile strain at the bottom of the surface for overloaded tires, (b) both high inflation pressure and heavy load caused a high increase in tensile strain at the bottom of the surface and a significant reduction of the pavement fatigue damage life, and (c) the axle load (not the inflation pressure) had a major influence on the subgrade rutting life.
This paper appeared in Transportation Research Record N1095, Design and Performance of Flexible Pavements.
Transportation Research Board
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Chen, H H
Marshek, K M
Saraf, C L
Transportation Research Record
Figures (12) ; References (4) ; Tables (4)
Old TRIS Terms:
Design; Highways; Pavements; Vehicles and Equipment; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces
Aug 31 1987 12:00AM
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