Damage detection; Principal component analysis; Blind Source Separation Techniques
Abstract :
[en] This paper addresses the problem of damage detection in civil engineering structures using characteristic subspaces obtained from principal component analysis (PCA) of output-only measurements. Damage detection is performed by comparing subspace features between a reference (healthy) state and a current (possibly damaged) state. The damage indicator used in this study is the angular coherence between sub-spaces.
The considered damage detection procedure is illustrated on the Champangshiehl Bridge which is a two span concrete box girder bridge located in Luxembourg. Before its destruction, multiple damage levels were inten-tionally created by cutting a growing number of prestressed tendons. Vibration data were acquired by the University of Luxembourg for each damaged state at many locations on the bridge. As previous studies dem-onstrated the large importance of environmental factors on modal identification, special care was taken to evaluate this influence during the test campaign.
Disciplines :
Civil engineering Mechanical engineering
Author, co-author :
Nguyen, Viet Ha; Université de Liège - ULiège > Aérospatiale et Mécanique > LTAS - Vibrations et Identification des Structures
Rutten, Christophe; V2i sa
Golinval, Jean-Claude ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Mahowald, Jean; Université du Luxembourg > Applied Mechanics and Energy Efficiency
Maas, Stefan; Université du Luxembourg > Applied Mechanics and Energy Efficiency
Waldmann, Danièle; Université du Luxembourg
Language :
English
Title :
Damage Detection on the Champangshiehl Bridge using Blind Source Separation
Publication date :
2012
Event name :
3rd International Symposium on Life-Cycle Civil Engineering (IALCCE 2012)
Event organizer :
University of Natural Resources and Life Sciences - Institute for Structural Engineering (IKI)
Event place :
Vienna Hofburg Palace, Austria
Event date :
du 3 au 6 octobre 2012
Audience :
International
Main work title :
Life-Cycle and Sustainability of Civil Infrastructure Systems
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