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OUTPUT-ONLY MODAL CHARACTERIZATION FOR A CONCRETE BRIDGE

Barbosa, P.H.M.; Albino, T.G.; Martins, C. J.;

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This study presents the methodology and results of a dynamic loading test carried out at bridge “Ponte do Canal de Sernambetiba” in Rio de Janeiro - Brazil. The applied technology considers the traffic, under normal conditions, and arbitrary environment loads as random input vibration sources. Eleven independent measurements were conducted on the bridge deck in order to detect the most important vibration modes. The acquired signals were processed by an algorithm based on Subspace Stochastic Identification (SSI) that computes the main structural resonances, damping and modal shapes. Afterwards, a numerical model of the structure, based on a Finite Elements Method, was created and calibrated according to the measured resonances. Finally, the validated model was applied in order to evaluate the response of the bridge under critical loading scenarios.

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Palavras-chave: Operational modal analysis, Digital signal processing, Finite Elements Method.,

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DOI: 10.5151/meceng-wccm2012-16769

Referências bibliográficas
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Como citar:

Barbosa, P.H.M.; Albino, T.G.; Martins, C. J.; "OUTPUT-ONLY MODAL CHARACTERIZATION FOR A CONCRETE BRIDGE", p. 370-379 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-16769

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