Abstract
A structural integrity assessment technique of pavements that considers the backcalculation of material properties is herein proposed. In order to carry out the backcalculation, a Nelder-Mead simplex (NMS) search is applied to estimate the elastic moduli of layered structures using the deflection data simulated by falling weight deflectometer (FWD) tests. In order to utilize a forward calculation engine of the numerical simulation in the FWD testing, a wave analysis program of layered pavement systems is used based on a spectral element method. The performance of the NMS inversion technique is evaluated based on a comparison with the Levenberg-Marquardt method.
| Original language | English |
|---|---|
| Pages (from-to) | 1389-1406 |
| Number of pages | 18 |
| Journal | International Journal for Numerical and Analytical Methods in Geomechanics |
| Volume | 33 |
| Issue number | 11 |
| DOIs | |
| State | Published - Aug 2009 |
Keywords
- Asphalt concrete pavement
- Falling weight deflectometer
- Inversion technique
- Nelder-Mead simplex