Response of a submerged floating tunnel subject to flow-induced vibration

Zou, P.X.; Bricker, Jeremy D.; Chen, L.Z.; Uijttewaal, W.S.J.; Ferreira, Carlos

doi:10.1016/j.engstruct.2021.113809

Cited by 32 publications

(10 citation statements)

References 39 publications

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“…By changing the boundary conditions of the tunnel from hinged at both ends to fxed at both ends, and fxed at one end and hinged at the other, two additional SFT models were simulated. Note that the realworld construction of an SFT has not yet been realized, and most existing studies have adopted either simply supported [4,31,32] or fxed-fxed [3,33,35,40] boundary conditions. Figure 20 summarizes the accuracy of displacement estimation.…”

Section: Boundary Conditionmentioning

confidence: 99%

“…Te SFT is an attractive alternative to conventional bridges or immersed tunnels because its construction is not limited by the span length or depth of the ocean foor [1]. So far, no real-world SFT has been constructed, but there are ongoing eforts to build SFTs [2][3][4][5]. Te development of monitoring systems to continuously evaluate the integrity of these SFTs is necessary.…”

Section: Introductionmentioning

confidence: 99%

“…Concluding remarks are provided in Section 6. Note that no real-world SFT construction has been realized; an SFT structure form, commonly used in previous studies [1][2][3] (as shown in Figure 1), is adopted in this study.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous Estimation of Submerged Floating Tunnel Displacement and Mooring Cable Tension through FIR Filter-Based Strain and Acceleration Fusion

Choi

Jang

et al. 2023

Structural Control and Health Monitoring

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A submerged floating tunnel (SFT) is a tunnel structure that floats approximately 50 m below the water surface and is anchored to the seabed by mooring cables. It is a new alternative to conventional bridges and immersed tunnels. There have been ongoing efforts to construct SFTs worldwide, and the integrity of these SFTs needs to be monitored throughout their lifespan. This study simultaneously estimated the tunnel displacement and mooring cable tension force using acceleration and strain measurements to assess the integrity of an SFT. First, strain measurements were transformed to displacement using simplified mode shapes and mode-scaling factors, which did not require the true mode shapes of the SFT. The mode-scaling factors were automatically estimated using initial strain and acceleration measurements. Then, the strain-based displacement was combined with the acceleration measurement using a finite impulse response filter to improve the displacement estimation accuracy. In addition, the tension force of a mooring cable was estimated from the displacement at the connection between the tunnel and mooring cable. The feasibility of the proposed technique was examined through a series of numerical simulations and laboratory tests on an 8 m-long aluminum SFT mock-up structure.

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Section: Boundary Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous Estimation of Submerged Floating Tunnel Displacement and Mooring Cable Tension through FIR Filter-Based Strain and Acceleration Fusion

Choi

Jang

et al. 2023

Structural Control and Health Monitoring

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“…Due to the lack of a real SFT structure in the world at present and their high complexity, it was necessary to simplify SFT structures into numerical simulation analysis and carry out relevant calculations under assumed conditions. Based on the existing design data and research results around the world [18,19], the SFT model was formed as presented in Fig. 2.…”

Section: Mathematical Modelmentioning

confidence: 99%

Research on the Dynamic Response of Submerged Floating Tunnels to Wave Currents and Traffic Load

Jiang¹,

Wu²,

Ji³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Submerged floating tunnel (SFTs) are typically subjected to complex external environmental and internal loads such as wave currents and traffic load. In this study, this problem is investigated through a finite element method able to account for fluid-structure interaction. The obtained results show that increasing the number of vehicles per unit length enhances the transverse vibrational displacements of the SFT cross sections. Under ultimate traffic load condition, one-way and two-way syntropic distributions can promote the dynamic responses of SFTs whereas two-way reverse distributions have the opposite effect.

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“…These structures float at a submergence depth and keep their location with mooring systems if needed. They have several advantages: (1) they can be safe from wave and seismic actions by properly selecting design parameters, (2) the deepwater application is much more straightforward without considerable hydrostatic pressure and temperature difference, as in the deepwater location, and (3) structural health monitoring is much easier [4][5][6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Potential Theory and Morison Equation for Deformable Horizontal Cylinders

Jin¹

2022

SUSTAIN MAR STRUCT

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This study investigates the hydro-elastic behaviors of fully submerged horizontal cylinders in different regular waves. Two methods were proposed and compared in this study. The first method was based on potential theory in frequency domain and the discrete-module-beam (DMB) method, which discretizes a floating elastic structure into a sufficient number of rigid bodies while simultaneously representing the elastic behavior from beam elements with Euler-Bernoulli beam and Saint-Venant torsion. Moreover, the Morison method in time domain was employed; this method estimates wave forces from the semi-empirical Morison equation, and the elastic behavior is embodied by massless axial, bending, and torsional springs.Various parametric studies on cylinder diameter, submergence depth, and wave direction were conducted. Wave forces, dry/wet mode shapes/natural frequencies, and dynamic motions are presented and analyzed.

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Response of a submerged floating tunnel subject to flow-induced vibration

Cited by 32 publications

References 39 publications

Simultaneous Estimation of Submerged Floating Tunnel Displacement and Mooring Cable Tension through FIR Filter-Based Strain and Acceleration Fusion

Simultaneous Estimation of Submerged Floating Tunnel Displacement and Mooring Cable Tension through FIR Filter-Based Strain and Acceleration Fusion

Research on the Dynamic Response of Submerged Floating Tunnels to Wave Currents and Traffic Load

Comparison of Potential Theory and Morison Equation for Deformable Horizontal Cylinders

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