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A wavelet-based damage detection algorithm based on bridge acceleration response to a vehicle
Author(s)
Date Issued
2012-04
Date Available
2014-12-10T12:19:06Z
Abstract
Previous research based on theoretical simulations has shown the potential of the wavelet transform to detect damage in a beam by analysing the time-deflection response due to a constant moving load. However, its application to identify damage from the response of a bridge to a vehicle raises a number of questions. Firstly, it may be difficult to record the difference in the deflection signal between a healthy and a slightly damaged structure to the required level of accuracy and high scanning frequencies in the field. Secondly, the bridge is going to have a road profile and it will be loaded by a sprung vehicle and time-varying forces rather than a constant load. Therefore, an algorithm based on a plot of wavelet coefficients versus time to detect damage (a singularity in the plot) appears to be very sensitive to noise. This paper addresses these questions by: (a) using the acceleration signal, instead of the deflection signal, (b) employing a vehicle-bridge finite element interaction model, and (c) developing a novel wavelet-based approach using wavelet energy content at each bridge section, which proves to be more sensitive to damage than a wavelet coefficient line plot at a given scale as employed by others.
Sponsorship
European Commission - Seventh Framework Programme (FP7)
Other Sponsorship
7th European Framework Project ASSET
Type of Material
Journal Article
Publisher
Elsevier
Journal
Mechanical Systems and Signal Processing
Volume
28
Start Page
145
End Page
166
Copyright (Published Version)
2011 Elsevier
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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Hester_Gonzalez_2014_Wavelet_based_damage_detection_algorithm_based_on_bridge_acceleration_to_vehicle.pdf
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1.21 MB
Format
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