Title: DYNAMIC ANALYSIS OF FALLING WEIGHT DEFLECTOMETER DATA
Abstract: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 s...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.). Because resonance is a less important factor in the displacement response characteristics of pavements subjected to transient loading, deflection data obtained from transient loading devices are, in general, easier to interpret.Read More
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: article
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Cited By Count: 38
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