SENSITIVITY STRUCTURE PARAMETERS IN FLEXIBLE PAVEMENT PERFORMANCE ANALYSIS
Keywords:
Mechanistic-empirical method; Factorial analysis; Distress, Mechanistic-empirical method, Factorial analysis, DistressAbstract
This study aimed to analyze the sensitivity of flexible pavements performance to variations in design parameters related to the thicknesses of asphalt layer, base and sub-base and resilient modulus of asphalt layer, base, sub-base and subgrade. For this purpose, a fractional factorial experiment was conducted, which had as output variables the accumulated damage in pavement structure, related to fatigue cracking and rutting in wheel wander. To obtain the accumulated damage, mechanistic-empirical design method was used, through PerRoad software. It was concluded that asphalt layer thickness is the most sensitive parameter considering the distresses studied, having a higher sensitivity for fatigue cracking and a slightly lower sensitivity for rutting.
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