01046067

Component

https://doi.org/10.3141/2005-07

http://scholar.google.com...zina&publication_year=2007

In pavement engineering practice, the falling weight deflectometer (FWD) is a recognized nondestructive tool to evaluate the mechanical characteristics of layered pavement systems. Unfortunately, elastostatic backcalculation remains the norm in the interpretation of FWD data, even though its underlying (static) analysis is inconsistent with the dynamic nature of the FWD test. Because of wave propagation effects, which are especially pronounced in the presence of a shallow stiff layer, the peak pavement deflections induced by the FWD loading can differ significantly from their static counterparts and thus compromise the conventional backcalculation of pavement moduli. In this study a frequency domain–based preprocessing procedure was developed to extract the static pavement response from the transient FWD records to provide a more consistent input for the elastostatic recovery of pavement profiles. To ensure the fidelity of the educed static deflections, the key drawbacks of typical field FWD data, namely, the baseline offset and the low-frequency noise pollution, were examined and remedied. For pavement engineering applications, the featured preprocessing procedure for extracting the static deflections from dynamic FWD records was implemented in a user-friendly graphical environment, GopherCalc. By comparing the results of the proposed and existing backanalyses applied to both synthetically generated (elastodynamic) data and field records, it was found that the proposed procedure had the potential for mitigating systematic errors associated with the dynamic nature of the FWD test while retaining the computationally effective elastostatic backcalculation scheme.

01082341

English

pp 55-63

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104319

Print

Figures (9) ; References (17) ; Tables (3)

Backcalculation; Data analysis; Deflection tests; Falling weight deflectometers; Field tests; Frequency domain analysis; Graphical user interfaces; Pavement performance

Preprocessing

Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Feb 8 2007 7:53PM

• Advanced Approaches to Characterizing Nonlinear Pavement System Responses
• Consideration of Finite Slab Size in Backcalculation Analysis of Jointed Concrete Pavements
• Development of Transfer Functions for Spectral Compatibility of Inertial Profilers Used in Long-Term Pavement Performance Program
• Early-Life Performance of Cold-in-Place Pavement Recycling with Foamed Asphalt Technique
• Effectiveness of Transverse and Longitudinal Pavement Grooving in Wet-Skidding Control
• Effects of Reclaimed Asphalt Pavement on Mechanical Properties of Base Materials
• Effects of Slab Temperature Profiles on Use of Falling Weight Deflectometer Data to Monitor Joint Performance and Detect Voids
• Evaluation of New Mechanistic–Empirical Pavement Design Guide Rutting Models for Multiple-Axle Loads
• Evaluation of Rubblized Pavement Sections in Michigan
• Forwardcalculation of Pavement Moduli with Load-Deflection Data
• Noninvasive Measurement of Three-Dimensional Permanent Strains in Asphalt Concrete with X-Ray Tomography Imaging
• Performance Evaluation of Bonded Concrete Pavement Overlays After 11 Years
• Prediction of Wet-Pavement Skid Resistance and Hydroplaning Potential
• Resilient Modulus of Base Course Containing Recycled Asphalt Pavement
• Stripping Detection in Asphalt Pavements with Seismic Methods
• Ultrathin Bonded Wearing Course as Pavement Preservation Treatment for Jointed Concrete Pavements
• Wavelet Analysis of Energy Content in Pavement Roughness and Truck Dynamic Axle Loads