A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Calibration of Pavement Response Models for the Mechanistic-Empirical Pavement Design Method
Most pavement design methodologies assume that the tire-pavement contact stress is equal to the tire inflation pressure and uniformly distributed over a circular contact area. However, tire-pavement contact area is not in a circular shape and the contact stress is neither uniform nor equal to the tire inflation pressure. To precisely account for the effect of actual contact stress on pavement responses, this research evaluates pavement responses under the 3-D non-uniform stresses and under the uniform stress. The studied pavement responses include the horizontal strains at the pavement surface, the horizontal strains at the bottom of the asphalt layer, and the vertical strains at the top of subgrade. A multi-layer linear-elastic computer program, CIRCLY, is used to estimate pavement strains under a number of combinations of tire load, tire pressure, asphalt modulus, asphalt thickness and subgrade modulus. The Asphalt Institute method and the Shell method are used to predict the pavement fatigue life based on the critical strains at the bottom of the asphalt layer calculated by both 3-D stress model and the uniform stress model.
Calibration of Pavement Response Models for the Mechanistic-Empirical Pavement Design Method
Most pavement design methodologies assume that the tire-pavement contact stress is equal to the tire inflation pressure and uniformly distributed over a circular contact area. However, tire-pavement contact area is not in a circular shape and the contact stress is neither uniform nor equal to the tire inflation pressure. To precisely account for the effect of actual contact stress on pavement responses, this research evaluates pavement responses under the 3-D non-uniform stresses and under the uniform stress. The studied pavement responses include the horizontal strains at the pavement surface, the horizontal strains at the bottom of the asphalt layer, and the vertical strains at the top of subgrade. A multi-layer linear-elastic computer program, CIRCLY, is used to estimate pavement strains under a number of combinations of tire load, tire pressure, asphalt modulus, asphalt thickness and subgrade modulus. The Asphalt Institute method and the Shell method are used to predict the pavement fatigue life based on the critical strains at the bottom of the asphalt layer calculated by both 3-D stress model and the uniform stress model.
Calibration of Pavement Response Models for the Mechanistic-Empirical Pavement Design Method
R. Luo (author) / J. A. Prozzi (author)
2007
85 pages
Report
No indication
English
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