In numerical modelling of suspension bridges, a preliminary step for the aeroelastic stability analysis is the determination of natural frequencies and mode shapes of the structure. They are generally obtained by a modal analysis conducted with respect to the deformed configuration under permanent loads. In this talk, a simplified analytical model will be introduced to discuss the dependence of the natural frequencies of suspension bridges upon the steady aerodynamic loads. This will be obtained by including the second-order effects induced by a constant transverse wind in the linearized bridge equations of motion. Numerical results will be presented and implications in flutter analysis will be discussed.

On the dynamics of suspension bridge decks with wind-induced second-order effects / Piana, Gianfranco. - ELETTRONICO. - (2015), pp. 1-1. (Intervento presentato al convegno Modelli Matematici per Ponti Sospesi tenutosi a Torino (ITALY) nel 17-18 Settembre 2015).

On the dynamics of suspension bridge decks with wind-induced second-order effects

PIANA, GIANFRANCO
2015

Abstract

In numerical modelling of suspension bridges, a preliminary step for the aeroelastic stability analysis is the determination of natural frequencies and mode shapes of the structure. They are generally obtained by a modal analysis conducted with respect to the deformed configuration under permanent loads. In this talk, a simplified analytical model will be introduced to discuss the dependence of the natural frequencies of suspension bridges upon the steady aerodynamic loads. This will be obtained by including the second-order effects induced by a constant transverse wind in the linearized bridge equations of motion. Numerical results will be presented and implications in flutter analysis will be discussed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2651513
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