Crognale, Marianna, Gattulli, Vincenzo, Ivorra, Salvador, Potenza, Francesco
An integrated vibration-image procedure for damage identification in steel trusses
Crognale, Marianna, et al. “An integrated vibration-image procedure for damage identification in steel trusses”. In: Papadrakakis, M.; Fragiadakis, M.; Papadimitriou, C. (Eds.). EURODYN 2020. Proceedings of the XI International Conference on Structural Dynamics, Streamed from Athens, Greece, 23-26 November 2020. Athens: Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens (NTUA), 2020. Vol. I. ISBN 978-618-85072-0-3, pp. 1011-1026
URI: http://hdl.handle.net/10045/110403
DOI: 
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ISBN: 978-618-85072-2-7 (Set)
Abstract: 
The paper deals with structural damage identification in steel trusses. Classical procedure based on dynamic measurements able to detect flexibility changes are complemented with data predicting cracks and their evaluating by image processing. The procedure proposes first a damage index, the Stiffness Reduction Factor (SRF), evaluated on the basis of the error between the predictive truss model and the experimental modal model. Then, a nonlinear FEM model is used to determine fatigue cracks in the truss nodes which are compared with the observed ones determined by image processing. A real case study, the Quisi bridge located in Spain, is used to show the potentiality of the procedure.
Keywords:Damage Identification, Steel Structures, Stochastic Subspace Identification, Fatigue Failure
National Technical University of Athens (NTUA). Institute of Structural Analysis and Antiseismic Research
info:eu-repo/semantics/conferenceObject