Nicese, Bernardo
[VerfasserIn]
;
Mannini, Claudio
[MitwirkendeR];
Marra, Antonio Maria
[MitwirkendeR];
Bartoli, Gianni
[MitwirkendeR];
Thiele, Klaus
[MitwirkendeR]
Influence of Cross-Section Details on Vortex-Induced Vibrations of Bridge Decks: Experiments and Modeling ; Einfluss von Querschnittsdetails auf Wirbelinduzierte Schwingungen von Brückenüberbauten: Experimente und Modellierung
Titel:
Influence of Cross-Section Details on Vortex-Induced Vibrations of Bridge Decks: Experiments and Modeling ; Einfluss von Querschnittsdetails auf Wirbelinduzierte Schwingungen von Brückenüberbauten: Experimente und Modellierung
Beteiligte:
Nicese, Bernardo
[VerfasserIn]
Erschienen:
TU Braunschweig: LeoPARD - Publications And Research Data, 2023-03-10
Anmerkungen:
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Beschreibung:
Vortex-induced vibrations represent a potentially critical phenomenon for bridges in a multitude of cases. The increasing optimization of modern bridge structures is giving rise to long spans and slender decks particularly sensitive to vortex shedding, which may generate deck oscillations unacceptable for the comfort of the users even for relatively low wind velocities. At the same time, the variety of geometric details characterizing bridge deck cross sections and the marked influence of an even limited variation of the flow angle of incidence add further difficulties to the prediction of bridge deck VIV response without an accurate and extended experimental campaign. In this context, VIV mathematical modeling represents a challenging but also an attractive issue for bridge decks, not only from a scientific point of view, but hopefully with the practical purpose of developing a mathematical approach able to support or at least partially reduce the amount of wind tunnel tests needed during the design phase. The present dissertation deals with the critical effect of significant cross-section geometric details and flow angle of attack on bridge deck VIV response and these factors are included in an extended study about two mathematical approaches for VIV response prediction applied to different configurations of a realistic bridge section. An overview of representative and meaningful studies provided by scientific literature about the influence of geometric details and angle of attack is firstly proposed, along with a description of mathematical modeling attempts developed over the years for VIV modeling of elongated cylinders with a constant cross section. The variability given by geometric features combined with angle of attack variation over a realistic range of values can be remarkable. This should be preferably taken into account by VIV mathematical modeling, usually developed, on the other hand, for simplified section geometries at zero angle of attack. In this work, a wake-oscillator model, derived from ...