Journal article
Dynamic backcalculation with different load-time histories
Department of Mechanical Engineering, Technical University of Denmark1
Solid Mechanics, Department of Mechanical Engineering, Technical University of Denmark2
Department of Civil Engineering, Technical University of Denmark3
Section for Geotechnics and Geology, Department of Civil Engineering, Technical University of Denmark4
This paper focused attention to the falling weight deflectometer (FWD) load-time history. For a commonly used device, it studied the pulse generation mechanism and the influence of different load histories on backcalculation results. In this connection, a semi-analytic impact theory was first introduced for realistically simulating FWD pulse generation.
Then a newly developed finite-element code was presented for FWD interpretation; the code is capable of addressing dynamics, time-dependent layer properties, and quasi-nonlinear behaviour. Both new developments were demonstrated for an experimental dataset that resulted from operating an FWD with different loading configurations.
It was found that backcalculated parameters are sensitive to the FWD pulse features. Consequently, it is recommended that, whenever advanced pavement characterisation is sought, experimental attention should be placed on generating diverse FWD pulse histories. Collectively, the resulting deflection histories will contain pertinent constitutive information for supporting the calibration of more complex pavement models.
Language: | English |
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Publisher: | Taylor & Francis |
Year: | 2018 |
Pages: | 1314-1333 |
ISSN: | 21647402 and 14680629 |
Types: | Journal article |
DOI: | 10.1080/14680629.2017.1307263 |
ORCIDs: | Madsen, Stine Skov and Levenberg, Eyal |
Dynamic backcalculation Falling weight deflectometer Finite-element method Load-time history
dynamic backcalculation finite-element method load-time history