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Author(s): Bart Peeters
Filip Dammekens
Filipe Magalhães
Herman Van der Auweraer
Elsa Caetano
Álvaro Cunha
Title: Multi-run Operational Modal Analysis of the Guadiana cable-stayed bridge
Issue Date: 2006
Abstract: Ambient vibration measurements of the International Guadiana Bridge are used to validate different methods for so-called multi-run Operational Modal Analysis. The bridge was measured in 28 runs, keeping some reference sensors at fixed locations while others were positioned at a different location in each run. Measuring all runs took more than 2 days and it was observed that in this period, the wind and traffic excitation was changing very significantly. The reference sensors have to be used in some sense to compensate for this non-stationary excitation. In the most traditional method, each run is analysed independently and, afterwards, the analysis results are combined to yield a global set of modal parameters. Another possibility that will be explored in this paper is to combine the data first and then only a single modal analysis need to be performed. Also in this paper, different modal parameter estimation methods will be assessed: the operational PolyMAX method will be compared to Stochastic Subspace Identification.
Subject: Engenharia civil
Civil engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia civil
Engineering and technology::Civil engineering
Source: Conference Proceedings of the Society for Experimental Mechanics Series
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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