Numerical investigations of the dynamic response of a floating bridge under environmental loadings

Sha, Yanyan; Amdahl, Jørgen; Aalberg, Arne; Zhang, Yu

doi:10.1080/17445302.2018.1426818

Cited by 31 publications

(7 citation statements)

References 16 publications

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“…Wang and Cheynet 19 proposed a fully coupled finite element model that simultaneously considered turbulent winds, inhomogeneous sea conditions, and shear currents, and they investigated the dynamic response of a floating suspension bridge under complex marine environments. Additionally, the combination of wave and current actions is an important factor affecting the safety of a floating structure, which results in a slow drifting motion of the floating structure 20 . Considering the fluid–structure interaction (FSI), Kvåle et al 21 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the dynamic responses of the end‐anchored floating bridge subjected to joint actions of earthquakes and water waves

Yan

Liu

et al. 2023

Earthq Engng Struct Dyn

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This study experimentally investigates a dynamic behavior of an end-anchored floating bridge under the joint actions of earthquakes and water waves. A truncated model with a geometrical scale of 1:100 was utilized for the hydrodynamic test, and an actuator was used to generate the earthquake input. A series of trials were conducted for the floating bridge model under the combined action of two different sea states and three earthquake inputs with increasing intensity based on the concept of the incremental dynamic analysis method. For comparison, the dynamic responses of the floating bridge model under earthquake action in still water and pure wave action were also conducted. Based on the test data, the dynamic responses, particularly focused on the sway, heave, roll, and pitch motions of the pontoons, of the test model were experimentally analyzed. The experimental results showed that earthquake excitation along the longitudinal axis of the bridge girder would induce noticeable oscillation of the bridge pontoons in still water. The magnitude of the coupled effects of earthquakes and water waves is dependent on the intensity of the earthquake inputs and the sea state.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the dynamic responses of the end‐anchored floating bridge subjected to joint actions of earthquakes and water waves

Yan

Liu

et al. 2023

Earthq Engng Struct Dyn

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“…The bridge pylon mechanism under wind-wave action was also studied through frequency domain analysis (Li et al, 2019). Moreover, the numerical floating bridge model (Sha et al, 2018) was established to figure out their structural responses under separate wind and wave action. These studies neglect the influence of the current, while the results considering the current action are more practical.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of the wind-wave-current-bridge system considering pile-soil interaction

Han

Pan

et al. 2022

Advances in Structural Engineering

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Coastal bridges are normally confronted with a complex marine environment including wind, wave and current. Present researches rarely take the current action and pile-soil interaction into consideration. It is thus essential to conduct the dynamic analysis of the cable-stayed bridge under wind-wave-current action considering pile-soil interaction. A coupled wind-wave-current-bridge (WWCB) system is proposed in this study to help understand the bridge dynamic performance. In the WWCB system, the bridge model is established through the finite element method, and the pile-soil interaction is considered through the pile-soil solid contact (PSSC) model. The wave-current action is obtained through a numerical wave tank, while the wind is simulated as the stochastic random process and generated with spectrums. The initial geostress, mass and density distribution are also considered in the WWCB system. To illustrate the bridge dynamic characteristics, dynamic responses under different load combinations are presented. Furthermore, the natural frequency and spectral density function comparison between the consolidation model, PSSC model and soil-spring model are provided to investigate the influence of the pile-soil interaction. The results show that different from previous conclusions, the wave-current action plays the dominant role instead of the wind action in some cases when considering the pile-soil interaction. Additionally, the consideration of the pile-soil interaction would decrease the structural stiffness, resulting in lower natural frequencies and wider frequency distribution. Consequently, the influence of the wave-current action and pile-soil interaction should be noted in the practical engineering.

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“…Owing to the convenience of simply taking the added masses and dampings as constants, some researchers have applied such simplification in the dynamical analysis of floating bridge structures. Sha et al (2018) conducted a nonlinear time domain dynamic analysis for a rigid frame floating bridge, in which the added masses were taken as constants corresponding to the infinite-frequency asymptotic values and the dominated natural frequencies. However, some other researchers carried out the analysis by using the ocean engineering analysis software, in which the convolution terms in Cummins' equation are directly calculated.…”

Section: Introductionmentioning

confidence: 99%

An Improved Time Domain Approach for Analysis of Floating Bridges Based on Dynamic Finite Element Method and State-Space Model

et al. 2022

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The floating bridge bears the dead weight and live load with buoyancy, and has wide application prospect in deep-water transportation infrastructure. The structural analysis of floating bridge is challenging due to the complicated fluid-solid coupling effects of wind and wave. In this research, a novel time domain approach combining dynamic finite element method and state-space model (SSM) is established for the refined analysis of floating bridges. The dynamic coupled effects induced by wave excitation load, radiation load and buffeting load are carefully simulated. High-precision fitted SSMs for pontoons are established to enhance the calculation efficiency of hydrodynamic radiation forces in time domain. The dispersion relation is also introduced in the analysis model to appropriately consider the phase differences of wave loads on pontoons. The proposed approach is then employed to simulate the dynamic responses of a scaled floating bridge model which has been tested under real wind and wave loads in laboratory. The numerical results are found to agree well with the test data regarding the structural responses of floating bridge under the considered environmental conditions. The proposed time domain approach is considered to be accurate and effective in simulating the structural behaviors of floating bridge under typical environmental conditions.

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Numerical investigations of the dynamic response of a floating bridge under environmental loadings

Cited by 31 publications

References 16 publications

Experimental study on the dynamic responses of the end‐anchored floating bridge subjected to joint actions of earthquakes and water waves

Experimental study on the dynamic responses of the end‐anchored floating bridge subjected to joint actions of earthquakes and water waves

Dynamic analysis of the wind-wave-current-bridge system considering pile-soil interaction

An Improved Time Domain Approach for Analysis of Floating Bridges Based on Dynamic Finite Element Method and State-Space Model

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