ABSTRACT

This paper shows the implementation of an algorithm to include the results of the VECD analysis of uniaxial cyclic fatigue laboratory tests in the CalME Incremental-Recursive process for the prediction of fatigue cracking in flexible pavements. The software CalME simulates the pavement response one increment at a time using the output of one increment as the input for the next step of the analysis (incremental-recursive). The damage accumulated after each cycle of the analysis is considered in the evaluation of the structural response in the subsequent step. The CalME formulations were slightly modified to accommodate the use of the parameters calculated through the VECD method. The hybrid methodology was validated using the results of the field and laboratory data available on the mixtures used at the Accelerated Pavement Testing (APT) Facility of the Turner-Fairbank Highway Research Center.