Cointegration for Structural Damage Detection Under Environmental Variabilities: An Experimental Study

Bilal Ali Qadri, Luis David Avendaño Valencia, Jan-Otto Hooghoudt, Martin Dalgaard Ulriksen

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Abstrakt

An intricacy in vibration-based structural damage detection (VSDD) relates to environmental variabilities (EVs) imposing limitations to the damage detectability. One method that has been put forth to resolve the issue is cointegration. Here, non-stationary vibration features are linearly combined into stationary residuals, which are then employed as damage indices under the assumption that the non-stationarity is governed by environmental variabilities. In the present paper, the feasibility of using cointegration to mitigate environmental variabilities while retaining sensitivity to damage is examined through an experimental study with a steel beam. A temperature-based environmental variability is introduced to the beam by use of a heating cable, while damage is emulated by adding local mass perturbations. The vibration response of the beam in different environmental and structural states is captured and utilized as features in a cointegration-based damage detection scheme. The performance of the scheme is assessed and compared to that of a scheme not accounting for the variability on the basis of the false positive ratio (FPR), the true positive ratio (TPR), and the area under the receiver operating characteristic curve (AUC). The results show that cointegration effectively mitigates the temperature variability and allows for an improved damage detectability compared to that of the scheme without a mitigation strategy.

OriginalsprogEngelsk
TitelDynamics of Civil Structures, Volume 2 - Proceedings of the 39th IMAC, A Conference and Exposition on Structural Dynamics, 2021
RedaktørerKirk Grimmelsman
Antal sider8
ForlagSpringer
Publikationsdato2022
Sider61-68
ISBN (Trykt)978-3-030-77142-3
DOI
StatusUdgivet - 2022
BegivenhedIMAC XXXIX, A Conference and Exposition on Structural Dynamics, 2021: Next Frontier in Structural Dynamics - Rozen Plaza Hotel, Orlando, USA
Varighed: 8 feb. 202111 feb. 2021
Konferencens nummer: 39
https://sem.org/imac

Konference

KonferenceIMAC XXXIX, A Conference and Exposition on Structural Dynamics, 2021
Nummer39
LokationRozen Plaza Hotel
Land/OmrådeUSA
ByOrlando
Periode08/02/202111/02/2021
Internetadresse
NavnConference Proceedings of the Society for Experimental Mechanics Series
ISSN2191-5644

Emneord

  • Damage detection
  • Structural health monitoring
  • Environmental and operational variabilities
  • Cointegration

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