An approach to developing load and resistance factors and design parameter offsets for inputs to the Mechanistic–Empirical Pavement Design Guide (MEPDG) is provided for the purpose of ensuring, with a high level of probability, that the MEPDG-predicted distress at any level of reliability does not exceed a given threshold. In the proposed approach, the two most significant sources of uncertainty in pavement design—input variability and model prediction error—are handled separately. The proposed method involves four major steps: experimental design, surrogate model estimation, model verification, and calculation of load and resistance factors and design offsets with the inverse first-order reliability method. The proposed method allows pavement engineers to account for uncertainty in loading and resistance parameters in a similar manner to the load and resistance factor design provisions of the American Institute of Steel Construction's Steel Construction Manual and the American Concrete Institute's ACI 318: Building Code Requirements for Structural Concrete. The proposed methods are illustrated for a typical flexible pavement.
Load and Resistance Factors and Design Parameter Offsets for Mechanistic–Empirical Pavement Design Guide
Transportation Research Record
Transportation Research Record: Journal of the Transportation Research Board ; 2305 , 1 ; 162-169
2012-01-01
Article (Journal)
Electronic Resource
English
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