Evaluation of accelerometers to determine pavement deflections under traffic loads
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Date
2009
Publication Type
Journal Article
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yes
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Abstract
The purpose of this work was to study the use of accelerometers to measure pavement deflections due to traffic loads. To this end, accelerometers were embedded in two sites: the full scale load simulator Circular Test Track (CTT) and the A1 motorway in Switzerland. Deflections were derived from acceleration measurements using an algorithm that double integrates the measured signal and corrects any errors derived from the procedure. In the motorway, deflections were monitored using a set of three magnetostrictive deflectometers. Additionally, the pavement's material viscoelastic parameters determined in the laboratory were incorporated in Finite Element (FE) models to estimate the theoretical deflections. The calculated deflections were then compared to the measured and to the theoretical deflections. Deflections calculated from acceleration showed a reasonable qualitative correlation to those measured by magnetostrictive deflectometers. In addition, the FE models revealed the inability of the accelerometers to measure very slow or quasi-static motion. © 2008 RILEM.
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published
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Journal / series
Materials and Structures
Volume
42 (6)
Pages / Article No.
779 - 790
Publisher
Springer
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Methods
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Date collected
Date created
Subject
Pavement deflections; Accelerometers; Deflectometers; Finite elements; Pavement modelling
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Notes
Received 2 November 2007, Accepted 21 August 2008, Published online 30 August 2008. It was possible to publish this article open access thanks to a Swiss National Licence with the publisher