Civil engineering structures; Damage detection; Principal component analysis; Statistics; Eigenfrequency.
Résumé :
[en] Damage identification for two real big bridges in Luxembourg is carried out in this paper. Vibration responses were captured from different types of excitation such as measurable and adjustable harmonic swept sine excitation and hammer impact. Before, different analysis methods were applied to the data measured from these structures showing interesting results. However, some difficulties are faced, especially due to environmental influences (temperature and soil-behaviour variations) overlaid to the structural changes caused by damage. These environmental effects are investigated in detail in this work. First, the modal parameters are identified from the response data by means of Wavelet Transform. In the next step, they are stochastically collected and processed through Principal Component Analysis. Damage index is based on outlier analysis.
Disciplines :
Ingénierie civile
Auteur, co-auteur :
NGUYEN, Viet Ha ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
MAHOWALD, Jean ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Golinval, Jean-Claude
MAAS, Stefan ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Langue du document :
Anglais
Titre :
Damage detection in bridge structures including environmental effects
Date de publication/diffusion :
juillet 2014
Nom de la manifestation :
9th International Conference on Structural Dynamics
Organisateur de la manifestation :
European Association for Structural Dynamics (EASD)
Lieu de la manifestation :
Porto, Portugal
Date de la manifestation :
from 30 June to 2 July 2014
Manifestation à portée :
International
Titre de l'ouvrage principal :
the Ninth International Conference on Structural Dynamics EURODYN 2014
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