The response of pavement systems to falling weight deflectometer (FWD) blows is evaluated by using a multidegree of freedom elastodynamic analysis. This analysis is based on a Fourier synthesis of a solution for periodic loading of elastic or viscoelastic horizontally layered strata. The method is verified for selected flexible pavement sections for which high-quality field and laboratory data are available in the literature. FWD deflection measurements at various geophone locations are compared by using dynamic as well as static analyses. The results indicate that inertial effects are important in the prediction of the pavement response. Conventional static analyses yield significantly different results and therefore yield erroneous (unconservative) predictions of pavement moduli back-calculated from deflection data. Elastodynamic analyses, based on fundamental material parameters (Young's modulus, mass density), appear to provide a useful vehicle for correlating pavement response between different loading modes (impulse, vibratory, etc. ).
|Original language||English (US)|
|Number of pages||6|
|Journal||Transportation Research Record|
|State||Published - Jan 1 1986|
ASJC Scopus subject areas
- Civil and Structural Engineering
- Mechanical Engineering