Effects of wind-barrier parameters on dynamic responses of wind-road vehicle–bridge system

Xue, Fanrong; Han, Yan; Zou, Yunfeng; He, Xuhui; Chen, Suren

doi:10.1016/j.jweia.2020.104367

Cited by 35 publications

(9 citation statements)

References 31 publications

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“…The aerodynamic forces of wind-vehicle-bridge systems were significantly affected by height and ventilation ratios, especially the side forces of the vehicles on the bridge deck. Furthermore, wind barriers significantly reduced aerodynamic vehicle forces while increasing bridge aerodynamic forces [15]. The sheltering output of a train above a railway bridge and the variation laws of flow field structure leeward a corrugated wind barrier with different bending angles were investigated, and the result showed that the lateral force and overturning moment of the barrier decreased as the bending angle increased, while there were no noticeable improvements in the lift force [16].…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Response and Running Posture Analysis When the Train Passes a Crosswind Region on a Bridge

et al. 2021

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Trains running on a bridge face more significant safety risks. Based on the Unsteady Reynolds-Averaged Navier–Stokes turbulence model, a three-dimensional Computational Fluid Dynamics computational model of the train–bridge–wind barrier was proposed in this study to measure the transient aerodynamic load of the train. The transient aerodynamic load was input into the wind–train–bridge coupling dynamic system to perform dynamic analysis of running safety. Significant fluctuations in the aerodynamic coefficients were found when the train entered and exited the wind barrier due to the dramatic change in flow pattern. The maximum value of the derailment coefficient decreased with the height of wind barriers, which hardly affected the wheel load reduction rate. The 2 m high wind barrier had no evident influence on the running posture of a general high-speed train, while the 4 m high wind barrier was proven to have better protection. Over-protection was found with an even higher wind barrier.

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Section: Introductionmentioning

confidence: 99%

Aerodynamic Response and Running Posture Analysis When the Train Passes a Crosswind Region on a Bridge

et al. 2021

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“…The WVB coupling vibration analysis has been investigated in various aspects, including the determination of proper bridge stiffness [72], the wind barrier performance evaluation and optimization [69,[73][74][75][76][77][78] and the safety assessment of train passing the pylons [79].…”

Section: Effect Of Crosswinds On Train-bridge Systemmentioning

confidence: 99%

A comprehensive review on coupling vibrations of train–bridge systems under external excitations

Xiang

Wang

et al. 2022

Rail. Eng. Science

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In recent years, high-speed railways in China have developed very rapidly, and the number and span of the railway bridges are keeping increasing. Meanwhile, frequent extreme disasters, such as strong winds, earthquakes and floods, pose a significant threat to the safety of the train–bridge systems. Therefore, it is of paramount importance to evaluate the safety and comfort of trains when crossing a bridge under external excitations. In these aspects, there is abundant research but lacks a literature review. Therefore, this paper provides a comprehensive state-of-the-art review of research works on train–bridge systems under external excitations, which includes crosswinds, waves, collision loads and seismic loads. The characteristics of external excitations, the models of the train–bridge systems under external excitations, and the representative research results are summarized and analyzed. Finally, some suggestions for further research of the coupling vibration of train–bridge system under external excitations are presented.

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“…It is widely known that reducing the porosity and increasing the height of the wind barrier affects the aerodynamic shape of the bridge and greatly increases the aerodynamic load of the bridge, which is very detrimental to the overall structural safety of the bridge [17]. After the porosity is reduced from 60% to 40%, the aerodynamic load of the wind barrier will increase by 20%.…”

Section: Introductionmentioning

confidence: 99%

Influence Mechanism of a Bridge Wind Barrier on the Stability of a Van-Body Truck under Crosswind

Zhi-qun

Xia

Lin³

et al. 2022

Atmosphere

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Understanding the crosswind stability of cars under strong wind loads and research on wind resistance methods is important for improving the safety performance of wind-induced driving on bridges. Taking van-body trucks as the research object, numerical calculation methods and wind tunnel test methods are used to conduct the wind-induced driving safety analyses of van trucks on a cross-sea bridge. The influence of the structural parameters of the barrier-type wind barrier on the aerodynamic characteristics and straight-line driving stability of the trucks on the bridge is studied and analyzed quantitatively. The results show that the decrease in the porosity of the wind barrier can effectively reduce the average wind speed of the bridge deck, and increasing the height of the wind barrier can effectively reduce the wind speed and increase the occlusion height of the bridge deck. The lateral acceleration, yaw rate, and lateral displacement of trucks decrease with the decrease in the porosity of the wind barrier and decrease with the increase in the height of the wind barrier. The research conclusions can not only provide data support for wind-induced driving safety analysis and the wind-resistant design of bridges but also provide a new method to balance the requirements of bridge wind-induced driving safety and bridge wind-induced structure safety.

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Effects of wind-barrier parameters on dynamic responses of wind-road vehicle–bridge system

Cited by 35 publications

References 31 publications

Aerodynamic Response and Running Posture Analysis When the Train Passes a Crosswind Region on a Bridge

Aerodynamic Response and Running Posture Analysis When the Train Passes a Crosswind Region on a Bridge

A comprehensive review on coupling vibrations of train–bridge systems under external excitations

Influence Mechanism of a Bridge Wind Barrier on the Stability of a Van-Body Truck under Crosswind

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