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Hydrodynamic interaction of floating bridge pontoons and its effect on the bridge dynamic responses
Abstract As pontoons of floating bridges respond to the dynamic actions of the wind and wave loading, additional forces are imposed on the pontoons due to the hydrodynamic interaction of these floating bodies. The wave forces on a selected pontoon and consequently its motion are affected by the presence and motion of adjacent pontoons through the motion of the fluid between the bodies. Here, we investigate the effect of such interactions on the global bridge dynamic responses. The hydrodynamic interaction effects are modeled using multibody potential theory with added artificial damping. The stochastic dynamic analyses of the bridge in the frequency-domain under combined wind and wave excitation revealed significant differences in the girder section forces when the interaction effects were included. The results imply that the hydrodynamic interaction effects should be considered in the design of such structures. The methodology presented here provides practical means for the analytical assessment of such effects.
Highlights Hydrodynamic interaction effects among pontoons of a floating bridge is investigated. Resonant effects are presented for pontoons 100 m apart. Dynamic response of the bridge is assessed including interaction effects. Significant increases in the dynamic response due to interaction are presented.
Hydrodynamic interaction of floating bridge pontoons and its effect on the bridge dynamic responses
Abstract As pontoons of floating bridges respond to the dynamic actions of the wind and wave loading, additional forces are imposed on the pontoons due to the hydrodynamic interaction of these floating bodies. The wave forces on a selected pontoon and consequently its motion are affected by the presence and motion of adjacent pontoons through the motion of the fluid between the bodies. Here, we investigate the effect of such interactions on the global bridge dynamic responses. The hydrodynamic interaction effects are modeled using multibody potential theory with added artificial damping. The stochastic dynamic analyses of the bridge in the frequency-domain under combined wind and wave excitation revealed significant differences in the girder section forces when the interaction effects were included. The results imply that the hydrodynamic interaction effects should be considered in the design of such structures. The methodology presented here provides practical means for the analytical assessment of such effects.
Highlights Hydrodynamic interaction effects among pontoons of a floating bridge is investigated. Resonant effects are presented for pontoons 100 m apart. Dynamic response of the bridge is assessed including interaction effects. Significant increases in the dynamic response due to interaction are presented.
Hydrodynamic interaction of floating bridge pontoons and its effect on the bridge dynamic responses
Fenerci, Aksel (author) / Kvåle, Knut Andreas (author) / Xiang, Xu (author) / Øiseth, Ole (author)
Marine Structures ; 83
2022-01-08
Article (Journal)
Electronic Resource
English
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