Abstract
Because of the material variability during the construction process, the material properties can not be determined accurately. In order to include this variability, the probabilistic approach has been proposed in the pavement analysis to consider the realistic situation in the construction process. In this study, the stochastic finite element is developed to investigate the effect of design parameters variability to pavement structural and performance analysis, and the mean and variance of pavement distress are computed. The statistical parameters of material properties are backcalculated from falling weight deflectometer (FWD) test data, and the Long Term Pavement Performance (LTPP) database developed by Federal Highway Administration (FHWA) in the United State were used to evaluate the statistical parameters of pavement. Then, the average and the variance of the response parameters such as displacements and stresses are computed, and the statistical parameters of rut depth and fatigue cracking under traffic loading are also calculated, and the results can be used for pavement reliability design.
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