Inverse analysis is widely used in geotechnical problems, among others, to search a set of input parameters that best fits the observations of a certain model. However, the solutions of an inverse problem are always affected by uncertainties associated with parameter determination, which should be considered simultaneously to the variability of geotechnical data. This paper focuses on the uncertainty analysis of material properties on the responses of Falling Weight Deflectometer tests. A dynamic backcalculation model and a number of sensitivity indices based on Monte Carlo simulation techniques (i.e. Fourier amplitude sensitivity test, FAST) are presented. The dynamic backcalculation is carried-out in the time domain and the inverse procedure is solved by minimizing a relative absolute objective function that involves the peak deflections. Although focus is placed on uncertainties in subgrade material properties, the methodology presented in the paper can be used to quantify uncertainties associated with other layer properties and pavement responses.
Uncertainty and Sensitivity Analysis of FWD Test
Downloaded 71 times
GeoHunan International Conference 2011
Uncertainty and Sensitivity Analysis of FWD Test
Abstract
Paving Materials and Pavement AnalysisApril 2012
Journal of Transportation EngineeringNovember 1991
Authors
Laboratoire de Mécanique des Sols, Structures et Matériaux, CNRS UMR 8579, Ecole Centrale Paris, Grande Voie des Vignes, 92290 Châtenay Malabry, France.E-mail: [email protected]
Phd student, Ecole Centrale Paris, Grande Voie des Vignes, 92290 Châtenay Malabry, France & School of Engineering, DEC, University of Minho, Campus Azurem, 4800-058 Guimarães, Portugal.E-mail: [email protected] & [email protected]
Professor, School of Engineering, DEC/ C-TAC, University of Minho, Campus Azurem, 4800-058 Guimarães, Portugal.E-mail: [email protected]
Published online: April 26, 2012
GeoHunan International Conference 2011
June 9-11, 2011 | Hunan, China
© 2011 American Society of Civil Engineers