Effectiveness of static and dynamic backcalculation approaches for asphalt pavement
- 1 July 2020
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Civil Engineering
- Vol. 47 (7), 846-855
- https://doi.org/10.1139/cjce-2019-0052
Abstract
In this study, the field falling weight deflectometer (FWD) data for asphalt pavement with various base types were backcalculated through dynamic and static backcalculation approaches, and the effectiveness of backcalculation approaches was studied. Asphalt concrete (AC) was treated as a viscoelastic material and the complex modulus was obtained using the dynamic approach. The dynamic modulus at a fixed frequency was computed for comparison purposes. The coefficient of variance and the compensating layer effect were assumed as two characteristics for the effectiveness of backcalculation approaches. The results show that the layer property from the dynamic backcalculation approach for different stations were more consistent and showed smaller coefficient of variance, which were more appropriate for the characterization pavement behavior. The elastic moduli from the static approach were more variable and exhibited a compensating layer effect in which a portion of the modulus of one layer was backcalculated into other layers. The dynamic approach is more effective than static approaches in backcalculation of layer properties.Keywords
This publication has 25 references indexed in Scilit:
- Finite element model for crack growth process in concrete bituminousAdvances in Engineering Software, 2012
- Dynamic interpretation of falling weight deflectometer tests on flexible pavements using the spectral element method: backcalculationCanadian Journal of Civil Engineering, 2009
- Dynamic response of a flexible pavement submitted by impulsive loadingSoil Dynamics and Earthquake Engineering, 2009
- Viscoelastic Modeling and Field Validation of Flexible PavementsJournal of Engineering Mechanics, 2006
- Dynamic Time Domain Backcalculation of Layer Moduli, Damping, and Thicknesses in Flexible PavementsTransportation Research Record: Journal of the Transportation Research Board, 2004
- Spectral element technique for efficient parameter identification of layered media: Part II: Inverse calculationInternational Journal of Solids and Structures, 2001
- Spectral element technique for efficient parameter identification of layered media. I. Forward calculationInternational Journal of Solids and Structures, 2001
- Dynamic Analysis-Based Approach To Determine Flexible Pavement Layer Moduli Using Deflection Basin ParametersTransportation Research Record: Journal of the Transportation Research Board, 1998
- A Spectral Element Approach to Wave Motion in Layered SolidsJournal of Vibration and Acoustics, 1992
- Spectral Analysis of Wave Motion in Plane Solids With BoundariesJournal of Vibration and Acoustics, 1992