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Sensitivity analysis of bridge flutter with respect to mechanical parameters of the deck

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Abstract

A methodology for carrying out an analytical sensitivity analysis of the flutter phenomenon in long-span bridges is developed. Decks of bridges are generally bluff bodies and therefore the aeroelastic forces under wind action have to be experimentally evaluated in wind tunnels. Such forces depend on the response frequency of the bridge, which is not known until the problem is solved. Consequently, the calculus of the critical wind speed that initiates the flutter instability comprises a complex nonlinear eigenvalue problem. During the design phase, the sensitivity analysis gives very interesting information about the gradient of the flutter speed with respect to the key chosen design variables, moments of inertia of the bridge deck. The presented method is applied to the Great Belt and Vasco da Gama Bridges, as well as to the old Tacoma Bridge.

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  1. School of Civil Engineering, University of La Coruna, Campus de Elvina, La Coruna, 15071, Spain

    J.A. Jurado & S. Hernández

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  1. J.A. Jurado
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  2. S. Hernández
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Correspondence to J.A. Jurado.

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Jurado, J., Hernández , S. Sensitivity analysis of bridge flutter with respect to mechanical parameters of the deck. Struct Multidisc Optim 27, 272–283 (2004). https://doi.org/10.1007/s00158-003-0374-8

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  • DOI: https://doi.org/10.1007/s00158-003-0374-8

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