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Dynamics of Civil Structures, Volume 2 pp 217–228Cite as

Model-Based Estimation of Hydrodynamic Forces on the Bergsoysund Bridge

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Abstract

Knowledge of excitation loads on bridges are important for reliable design. Load models are however prone to uncertainties. Force identification using dynamic response measured on full-scale structures can be used to reduce the uncertainty. In this contribution, numerical simulations are performed to examine the feasibility of force identification on the floating pontoon Bergsoysund Bridge. We present a practical case study in which wave excitation forces and motion induced forces are estimated using only acceleration output. The sensor network considered represents the monitoring system currently installed on the bridge. A reduced order model with 26 modes is used to represent the structure in the identification. Wave force time series are generated by Monte Carlo simulations, and the acceleration response is obtained from a frequency domain solution of the equations of motion. The generated acceleration data is polluted with noise and subsequently used for identification. The results show that a joint input-state estimation algorithm is able to adequately identify a subset of hydrodynamic forces acting on the pontoons in the presence of both measurement and model errors. The translational forces are identified with a larger accuracy than the moments. Lastly, considerations and improvements for an analysis with experimental field data are presented.

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Authors and Affiliations

  1. Norwegian University of Science and Technology, 7491, Trondheim, Norway

    Øyvind Wiig Petersen, Ole Øiseth & Torodd S. Nord

  2. Delft University of Technology, 2628 CN, Delft, The Netherlands

    Eliz-Mari Lourens

Authors
  1. Øyvind Wiig Petersen
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  2. Ole Øiseth
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  3. Torodd S. Nord
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  4. Eliz-Mari Lourens
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Correspondence to Øyvind Wiig Petersen .

Editor information

Editors and Affiliations

  1. Dept of Civil & Envt Engg, Lehigh University, Bethlehem, Pennsylvania, USA

    Shamim Pakzad

  2. University of South Carolina, Columbia, USA

    Caicedo Juan

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© 2016 The Society for Experimental Mechanics, Inc.

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Petersen, Ø.W., Øiseth, O., Nord, T.S., Lourens, EM. (2016). Model-Based Estimation of Hydrodynamic Forces on the Bergsoysund Bridge. In: Pakzad, S., Juan, C. (eds) Dynamics of Civil Structures, Volume 2. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-29751-4_22

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  • DOI: https://doi.org/10.1007/978-3-319-29751-4_22

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-29750-7

  • Online ISBN: 978-3-319-29751-4

  • eBook Packages: EngineeringEngineering (R0)

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