Stochastic Study of Design Parameters and Lack-of-Fit of Performance Model in the Texas Flexible Pavement Design System.

摘要

A study of the initial serviceability index of flexible pavements was performed to obtain better estimates of expected average values and variations associated with this input parameter. Twenty-one pavement projects were evaluated in the study,including ten hot-mix asphalt-concrete pavement and 11with surface treatment. The study showed a significant difference in initial serviceability of the two types. A method for determining the variation in the performance equation caused by lack-of-fit is outlined herein,and recommendations for the types of data necesssary for a quantitative evaluation are presented.