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Conference of the Italian Association for Wind Engineering

IN VENTO 2018: Proceedings of the XV Conference of the Italian Association for Wind Engineering pp 387–401Cite as

Motion-Dependent Forces on Streamlined Bridge Girders and Their Influencing Parameters – Observations from Wind Tunnel Buffeting Response Data

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Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 27))

Abstract

Aerodynamic stability of long-span bridges is most readily examined in the frequency domain, with self-excited forces modelled as linearized functions of the bridge velocities and displacements. The present paper briefly recalls the experimental approaches to characterize the motion-dependent forces, and further explores the validity of superposition of the linearized load components, in presence of various influencing parameters. Flutter derivatives obtained with section models of two streamlined bridge girders in ambient vibrations are revisited. Emphasis is placed on the influence of the twisting to vertical frequency ratio and the type of the participating degrees of freedom on the identified wind-structure interaction. A novel aspect of the analysis of the buffeting response data is also attempted, in order to isolate the significance of the twisting amplitude on the self-excited wind forces in ambient vibrations.

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Acknowledgements

The author is grateful to a number of colleagues who developed and conducted the wind tunnel studies revisited in this work: dr. Svend Ole Hansen and his wind tunnel team, Prof. Emeritus Erik Hjorth-Hansen from the Norwegian University of Science and Technology, The Norwegian Public Administration represented by dr. Bjørn Isaksen, Prof. Rudiger Höffer and dr. Christian Neuhaus from the Ruhr University of Bochum, and Ass. Prof. Ove Mikkelsen from the University of Stavanger. Assistance of dr. Etienne Cheynet from the University of Stavanger in the manuscript preparation is also greatly appreciated.

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Authors and Affiliations

  1. Department of Structural and Mechanical Engineering and Material Sciences, University of Stavanger, 4036, Stavanger, Norway

    J. B. Jakobsen

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  1. J. B. Jakobsen
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Correspondence to J. B. Jakobsen .

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Editors and Affiliations

  1. Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy

    Francesco Ricciardelli

  2. Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy

    Alberto Maria Avossa

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Jakobsen, J.B. (2019). Motion-Dependent Forces on Streamlined Bridge Girders and Their Influencing Parameters – Observations from Wind Tunnel Buffeting Response Data. In: Ricciardelli, F., Avossa, A. (eds) Proceedings of the XV Conference of the Italian Association for Wind Engineering. IN VENTO 2018. Lecture Notes in Civil Engineering, vol 27. Springer, Cham. https://doi.org/10.1007/978-3-030-12815-9_31

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  • DOI: https://doi.org/10.1007/978-3-030-12815-9_31

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-12814-2

  • Online ISBN: 978-3-030-12815-9

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