A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of Backcalculation Algorithms through Dynamic Modeling of FWD Test
The first five chapters of this report contain a review of some of the most widely used backcalculation algorithms for the evaluation of pavement layers moduli. The results from different backcalculation programs are compared to each other for different types of pavements. Currently, the only means of assessing the accuracy of a backcalculation algorithm is to compare its results with the values obtained through laboratory measurements of core samples. Discrepancies are attributed to the inability of replicating, in laboratory tests, the same consolidation and stress conditions in the field. In Chapter 6, explicit nonlinear 3D Finite Modeling (FEM) is used to backcalculate the layers moduli of rigid, flexible, and composite pavement structures. The modeling approach accounts for the dynamic nature of the Falling Weight Deflectometer (FWD) load, friction at pavement layers interfaces, and the 3D geometrical characteristics of the pavement structure. The FWD-measured and FEM-generated deflection basins are matched by adjusting the values of layers moduli used in the FEM model.
Evaluation of Backcalculation Algorithms through Dynamic Modeling of FWD Test
The first five chapters of this report contain a review of some of the most widely used backcalculation algorithms for the evaluation of pavement layers moduli. The results from different backcalculation programs are compared to each other for different types of pavements. Currently, the only means of assessing the accuracy of a backcalculation algorithm is to compare its results with the values obtained through laboratory measurements of core samples. Discrepancies are attributed to the inability of replicating, in laboratory tests, the same consolidation and stress conditions in the field. In Chapter 6, explicit nonlinear 3D Finite Modeling (FEM) is used to backcalculate the layers moduli of rigid, flexible, and composite pavement structures. The modeling approach accounts for the dynamic nature of the Falling Weight Deflectometer (FWD) load, friction at pavement layers interfaces, and the 3D geometrical characteristics of the pavement structure. The FWD-measured and FEM-generated deflection basins are matched by adjusting the values of layers moduli used in the FEM model.
Evaluation of Backcalculation Algorithms through Dynamic Modeling of FWD Test
S. N. Shoukry (author) / D. Martinelli (author) / G. William (author) / O. Selezneva (author)
1998
160 pages
Report
No indication
English
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