Numerical Modelling of Floating and Submerged Bridges Subjected to Wave, Current and Wind

Lie, Halvor; Fu, Sun; Fylling, Ivar; Fredriksen, Arnt G.; Bonnemaire, Basile; Kjersem, Geir Lasse

doi:10.1115/omae2016-54851

Cited by 8 publications

(10 citation statements)

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“…This paper is mainly focusing on the validation and feasibility of the newly developed methods. The inhomogeneous waves used are measured data from another fjord in Norway [19], not specifically for the current floating bridge site. Regarding the effect of the inhomogeneity of the waves, further studies need to be carried out to make more general conclusions.…”

Section: Discussionmentioning

confidence: 99%

A Time-Domain Method for Hydroelastic Analysis of Floating Bridges in Inhomogeneous Waves

Wei

et al. 2017

Volume 9: Offshore Geotechnics; Torgeir Moan Honoring Symposium

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Based on the three dimensional potential theory and finite element method (FEM), this paper presented a method for time-domain hydroelastic analysis of a floating bridge in inhomogeneous waves. A floating bridge in both regular and irregular waves, is taken as a numerical example. This method is firstly validated by the comparisons of the results between frequency domain method and presented time domain method under regular wave condition. Then the hydroeleastic responses of the floating bridge in waves with spatially varying significant wave height/peak period are presented, with the purpose to illustrate the feasibility of the proposed method. The primary results at this stage indicate that the inhomogeneity of the waves might affect the structure dynamic responses of the floating bridge in waves.

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Section: Discussionmentioning

confidence: 99%

A Time-Domain Method for Hydroelastic Analysis of Floating Bridges in Inhomogeneous Waves

Wei

et al. 2017

Volume 9: Offshore Geotechnics; Torgeir Moan Honoring Symposium

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“…The concept of a floating bridge supported by discrete pontoons has been proposed in Norway. Overall bridge model is shown in Fig.2, which has been proposed by Lie et al, [2]. All pontoons and connecting girders have been numbered as P1, B0 to P12, B12 from the left side to right, respectively.…”

Section: Floating Bridgementioning

confidence: 99%

“…Because of the large water depth (more than 500 meters), the surface crossing concept will greatly decrease the cost of this project, compared with the underwater floating tunnel concept. One of the concepts of floating bridge crossing Masfjorden was studied by Lie et al [2], which is 700 meters long, with a water depth of 500 m.…”

Section: Introductionmentioning

confidence: 99%

“…Neglecting the hydrodynamic coupling effect between adjacent pontoons and the effect of the fjord boundary (shore sides), Lie et al [2] investigated the hydroelasticity of two floating tunnel/bridge under waves and current. However, some researches indicated that the two neglected factors sometimes could have non-negligible influences on the hydrodynamics of each module [16].…”

Section: Introductionmentioning

confidence: 99%

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Hydro-Elastic Analysis of a Floating Bridge in Waves Considering the Effect of the Hydrodynamic Coupling and the Shore Sides

Deng

Moan

et al. 2018

Volume 1: Offshore Technology

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A new numerical method, which is based on three-dimensional (3D) potential flow theory and finite element method (FEM), is used to predict the wave-induced hydroelastic responses of flexible floating bridges. The floating bridge is discretized into several modules based on the positions of the pontoons which are connected by elastic beams. The motion equations of the entire floating structure are established according to the six degrees of freedom (6DOF) motions of each rigid module coupled with the dynamics of the elastic beams. The hydrodynamics loads on each module are considered as external loads and simultaneously applied. The method is extended to take into account the shore side effect, which is obtained from the 3D potential flow theory and considered as a hydrodynamic boundary condition. The effects of inclination of shore side on the responses of the bending moment, horizontal and vertical displacements of the pontoon and their distribution along the bridge are investigated. The results show that the displacement response increase with an increasing steepness of the shore side.

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“…Compared to wave loads, wind loads and load effects on pontoon-type floating bridges are much less addressed in the literature. Lie et al [10] investigated the feasibility of deploying an end-anchored floating bridge in Masfjorden and compared its dynamic response with a submerged tube bridge concept. The wind, wave and current loads on the floating bridges were considered; however, the modeling of wind, wave and current loads were not well stated.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of a Floating Bridge Subjected to Environmental Loads

Cheng

Gao

Moan

2018

Volume 7A: Ocean Engineering

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Designing floating bridges for wide and deep fjords is very challenging. The floating bridge is subjected to wind, wave, and current loads. All these loads and corresponding load effects should be properly evaluated, e.g. for ultimate limit state design check. In this study, the wind-, wave- and current-induced load effects of an end-anchored floating bridge are numerically investigated. The considered floating bridge, about 4600 m long, was an early concept for crossing Bjørnafjorden, Norway. It consists of a cable-stayed high bridge part and a pontoon-supported low bridge part, and has a number of eigen-modes, which might be excited by the relevant environmental loads. Numerical simulations show that the sway motion and strong axis bending moment along the bridge girder are primarily induced by wind loads, while variations of heave motion and weak axis bending moment are mainly induced by wave loads. Current loads mainly provide damping force to reduce the variations of sway motion and strong axis bending moment. Turbulent wind can cause significantly larger low-frequency resonant responses than second-order difference-frequency wave loads.

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Numerical Modelling of Floating and Submerged Bridges Subjected to Wave, Current and Wind

Cited by 8 publications

References 0 publications

A Time-Domain Method for Hydroelastic Analysis of Floating Bridges in Inhomogeneous Waves

A Time-Domain Method for Hydroelastic Analysis of Floating Bridges in Inhomogeneous Waves

Hydro-Elastic Analysis of a Floating Bridge in Waves Considering the Effect of the Hydrodynamic Coupling and the Shore Sides

Dynamic Response Analysis of a Floating Bridge Subjected to Environmental Loads

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