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Effect of the Relative Root-Mean-Square Error on Pavement Response
Analysis of flexible pavements using the multilayered elastic theory involves the use of elastic moduli backcalculated from deflection basins measured utilizing the Falling Weight Deflectometer (FWD). Uncertainties associated with the thickness of the elastic layers, seed moduli, and the backcalculation algorithms have been studied to increase the reliability and accuracy of the backcalculated deflection basin by minimizing the relative root-mean-square error (RMSE). Therefore, the RMSE of the backcalculated deflection basin has been used always to assess the validity of the backcalculated set of elastic moduli of the pavement. In this study, the sensitivity of the pavement response to the RMSE is investigated by comparing the response of a pavement section using the exact set of moduli with that using the backcalculated set of pavement moduli with a RMSE less than 1%. The results showed that even when the RMSE in deflections is as low as 0.22%, the pavement response (strain, stress, and therefore fatigue and rutting predictions) using the backcalculated set of moduli can largely be different than that using the exact set of moduli, suggesting more uncertainties to the backcalculated set of moduli.
Effect of the Relative Root-Mean-Square Error on Pavement Response
Analysis of flexible pavements using the multilayered elastic theory involves the use of elastic moduli backcalculated from deflection basins measured utilizing the Falling Weight Deflectometer (FWD). Uncertainties associated with the thickness of the elastic layers, seed moduli, and the backcalculation algorithms have been studied to increase the reliability and accuracy of the backcalculated deflection basin by minimizing the relative root-mean-square error (RMSE). Therefore, the RMSE of the backcalculated deflection basin has been used always to assess the validity of the backcalculated set of elastic moduli of the pavement. In this study, the sensitivity of the pavement response to the RMSE is investigated by comparing the response of a pavement section using the exact set of moduli with that using the backcalculated set of pavement moduli with a RMSE less than 1%. The results showed that even when the RMSE in deflections is as low as 0.22%, the pavement response (strain, stress, and therefore fatigue and rutting predictions) using the backcalculated set of moduli can largely be different than that using the exact set of moduli, suggesting more uncertainties to the backcalculated set of moduli.
Effect of the Relative Root-Mean-Square Error on Pavement Response
Alkasawneh, Wael (author) / Pan, Ernie (author) / Green, Roger (author)
Geo-Denver 2007 ; 2006 ; Boulder, Colorado, United States
2007-08-28
Conference paper
Electronic Resource
English
Effect of the Relative Root-Mean-Square Error on Pavement Response
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