A comparison of damage detection methods applied to civil engineering structures

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Abstract

Facilitating detection of early-stage damage is crucial for in-time repairs and cost-optimized maintenance plans of civil engineering structures. Preferably, the damage detection is performed by use of output vibration data, hereby avoiding modal identification of the structure. Most of the work within the vibration-based damage detection research field assumes that the unmeasured excitation signal is time-invariant with a constant covariance, which is hardly achieved in practice. In this paper, we present a comparison of a new Mahalanobis distance-based damage detection method with the well-known subspace-based damage detection algorithm robust to changes in the excitation covariance. Both methods are implemented in the modal analysis and structural health monitoring software ARTeMIS, in which the joint features of the methods are concluded in a control chart in an attempt to enhance the damage detection resolution. The performances of the methods and their fusion are evaluated in the context of ambient vibration signals obtained from, respectively, numerical simulations on a simple chain-like system and a full-scale experimental example, namely, the Dogna Bridge. The results reveal that the performances of the two damage detection methods are quite similar, hereby evidencing the justification of the new Mahalanobis distance-based approach as it is less computational complex. The control chart presents a comprehensive overview of the progressively damaged structure.
Luk

Detaljer

Facilitating detection of early-stage damage is crucial for in-time repairs and cost-optimized maintenance plans of civil engineering structures. Preferably, the damage detection is performed by use of output vibration data, hereby avoiding modal identification of the structure. Most of the work within the vibration-based damage detection research field assumes that the unmeasured excitation signal is time-invariant with a constant covariance, which is hardly achieved in practice. In this paper, we present a comparison of a new Mahalanobis distance-based damage detection method with the well-known subspace-based damage detection algorithm robust to changes in the excitation covariance. Both methods are implemented in the modal analysis and structural health monitoring software ARTeMIS, in which the joint features of the methods are concluded in a control chart in an attempt to enhance the damage detection resolution. The performances of the methods and their fusion are evaluated in the context of ambient vibration signals obtained from, respectively, numerical simulations on a simple chain-like system and a full-scale experimental example, namely, the Dogna Bridge. The results reveal that the performances of the two damage detection methods are quite similar, hereby evidencing the justification of the new Mahalanobis distance-based approach as it is less computational complex. The control chart presents a comprehensive overview of the progressively damaged structure.
OriginalsprogEngelsk
TitelExperimental Vibration Analysis for Civil Engineering Structures : Testing, Sensing, Monitoring, and Control
RedaktørerJoel P. Conte, Rodrigo Astroza, Gianmario Benzoni, Glauco Feltrin, Kenneth J. Loh, Babak Moaveni
Udgivelses stedCham, Switzerland
ForlagSpringer
Publikationsdato2018
Sider306-316
ISBN (Trykt)978-3-319-67442-1
ISBN (Elektronisk)978-3-319-67443-8
DOI
StatusUdgivet - 2018
PublikationsartForskning
Peer reviewJa
Begivenhed7th International Conference of Experimental Vibration Analysis for Civil Engineering Structures - UC San Diego campus in La Jolla, California, USA , San Diego, California, USA
Varighed: 12 jul. 201714 jul. 2017
Konferencens nummer: 7

Konference

Konference7th International Conference of Experimental Vibration Analysis for Civil Engineering Structures
Nummer7
LokationUC San Diego campus in La Jolla, California, USA
LandUSA
BySan Diego, California
Periode12/07/201714/07/2017
NavnLecture Notes in Civil Engineering
Volume/Bind5
ISSN2366-2557
NavnLecture Notes in Civil Engineering (electronic)
Volume/Bind5
ISSN2366-2565

Bibliografisk note

Proceedings of the 7th International Conference on Experimental Vibration Analysis for Civil Engineering Structures

    Forskningsområder

  • Structural health monitoring, Ambient excitation, Damage detection, Control chart-based algorithm fusion

Kort

ID: 260405764