Influence of the sag-to-span ratio on the dynamic response of a long-span bridge suspended from floating towers under wave and wind loads

Wei, Kai; Zhang, Feng; Zhang, Mingjin; Mei, Dapeng; Qin, Shunquan

doi:10.1080/17445302.2021.1889896

Cited by 10 publications

(1 citation statement)

References 20 publications

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“…Xu et al (2018aXu et al ( , 2018b) also conducted an investigation on the the dynamic behavior of a floating suspension bridge under the excitations of wind and wave, where the radiation forces on the floating towers and the aerodynamic forces acting on the bridge girder, were calculated by introducing the theory of state-space model. Considering wave and wind loads, Wei et al (2021) studied the influence of the sag-to-span ratio on the dynamic response of a long-span suspension bridge with two floating towers, and results show that the natural period of the floating bridge decreases with the reduction in sag-to-span ratio. Wan et al (2021) conducted a numerical study to evaluate the influences of bridge radius, cross-sectional rigidity on the structural performance of floating bridge with three pontoons, where static loads and wave load were considered.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation on the hydrodynamic performance of floating bridge foundation with taut mooring system

Xiang

Zhang

Cheng

et al. 2023

Advances in Structural Engineering

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Floating bridges with floating foundations have wide application prospect in deep-water transportation infrastructures. The dynamic properties of floating foundation would deeply affect the structural characteristics of the whole floating bridges. However, limited research works, especially experimental studies, have been conducted to investigate the dynamic behaviors of floating bridge foundations. In this paper, a series of hydrodynamic model tests (including still water tests, regular wave tests, and environmental loading tests) on a floating bridge foundation composed of a floating platform and the mooring system combining tension legs and incline cables, are presented. The test campaign was conducted under the guidance of similarity criteria of Froude and Strouhal numbers, and focused on the structural hydrodynamic responses regarding platform motions and mooring tensions under wave and current loadings. Results show that, the hydrodynamic characteristics of the floating foundation could be quite different in bridge-transversal and -longitudinal directions. The platform dynamic motion is dominated by horizontal displacements, and slight coupling effects between rotational and lateral responses were found. Compared to the wave only conditions, the superposed currents in wave-current combination cases would mitigate the horizontally dynamic responses, and enhance the vertically heave oscillations of the floating foundation. The presented study provides beneficial references for further research on the design and construction of floating bridges in deep-water environment.

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