Dynamic analysis of coupled wind-train-bridge system considering tower shielding and triangular wind barriers

Zhang, Nan; Ge, Guanghui; Xia, He; Li, Xiaozhen

doi:10.12989/was.2015.21.3.311

Cited by 28 publications

(16 citation statements)

References 20 publications

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“…The corresponding blockage ratio is calculated to be 1.2%; regulation EN14067-6, 2010 notes that, in this case, no correction is needed. 21 The wind velocity of the inlet boundary is set to 10 m/s with a turbulence of 5%, and the outlet boundary is set to a zero-pressure outlet. Based on the height of the train–bridge model and the incoming flow, the Reynolds number is Re =1.24 × 10 5 .…”

Section: Computational Models and Methodsmentioning

confidence: 99%

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Effect of wind barriers on the flow field and aerodynamic forces of a train–bridge system

Zhou

Chen

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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This paper investigates the effect of a wind barrier on the aerodynamic performance of a train–bridge system under crosswind using a numerical simulation method. The studied bridge is a long-span cable-stayed bridge with a flat steel box girder, located in Chongqing, China. The flow field around the train–bridge system with and without a wind barrier is numerically simulated. Wind barrier porosities varying from 10 to 60% are evaluated. The tricomponent coefficients of the train, bridge, and train–bridge system are obtained and investigated in detail. The effect of the wind barrier on the aerodynamics of the train–bridge system is revealed through the determination of the aerodynamic forces, pressure mapping, and flow visualization. The results show that a wind barrier successfully decreases the mean velocity above the girder and consequently decreases the drag force and moment on the train; however, the wind barrier also significantly increases the drag force on the girder. Therefore, installation of a wind barrier improves the running safety of the train but is detrimental to the wind resistance of the bridge. Additionally, the efficiency of the wind barrier depends on the porosity. A lower porosity improves the train safety but is more detrimental to the bridge safety. An optimal wind barrier porosity of 30% is obtained based on the aerodynamic forces of both the train and the bridge. Compared to a train–bridge system without a wind barrier, the drag force and moment on the train decrease by 66.1 and 62.9%, respectively; the drag force on the bridge girder increases to 0.86, and the drag force on the train–bridge system equals that without the wind barrier.

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Section: Computational Models and Methodsmentioning

confidence: 99%

“…14 and Zhang et al. 21 proposed numerical models for the wind–vehicle–bridge system and numerically studied the safety of vehicles driven on bridges. They concluded that the wind barrier could significantly improve the dynamic behavior of the vehicles in a crosswind environment.…”

Section: Introductionmentioning

confidence: 99%

Effect of wind barriers on the flow field and aerodynamic forces of a train–bridge system

Zhou

Chen

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…The numerical simulation of the train-track-bridge system under the wind excitation have been applied to assess high-speed railway bridges crossing large river or valley [96,97], to investigate the influence of turbulent winds on the running safety of the train on a bridge and obtained the threshold curve of wind velocity and train speed [178,179], and to evaluate the improvement of the dynamic performance of the system with the wind barrier [121,175,180,181] or TMDs [180] installed on the bridge for achieving an optimal design of vibration control measure under the wind excitation.…”

Section: Wind Excitationmentioning

confidence: 99%

Train–track–bridge dynamic interaction: a state-of-the-art review

Zhai

Han

Chen

et al. 2019

Vehicle System Dynamics

322

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Train-track-bridge dynamic interaction is a fundamental concern in the field of railway engineering, which plays an extremely important role in the optimal design of railway bridges, especially in high-speed railways and heavy-haul railways. This paper systematically presents a state-of-the-art review of train-track-bridge dynamic interaction. The evolution process of train-bridge dynamic interaction model is described briefly, from the simplest moving constant force model to the sophisticated train-track-bridge dynamic interaction model (TTBDIM). The modelling methodology of the key elements in the TTBDIM is systematically reviewed, including the train, the track, the bridge, the wheel-rail contact, the track-bridge interaction, the system excitation and the solution algorithm. The significance of detailed track modelling in the whole system is highlighted. The experimental research and filed test focusing on modelling validation, safety assessment and long-term performance investigation of the train-track-bridge system are briefly presented. The practical applications of train-track-bridge dynamic interaction theory are comprehensively discussed in terms of the system dynamic performance evaluation, the system safety assessment and train-induced environmental vibration and noise prediction. The guidance is provided on further improvement of the train-track-bridge dynamic interaction model and the challenging research topics in the future. ARTICLE HISTORY

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“…The barrier heights and ventilation ratios were found to affect the aerodynamic characteristics of trains. Zhang et al (2015) investigated the bridge and train system considering the shielding effect of the bridge tower with different sizes of triangular wind barriers. The results show that the installation of triangular wind barriers in the proximity of the bridge tower has a significant influence on the car-body acceleration and leads to a slight change in the vibration of the train and bridge.…”

Section: Introductionmentioning

confidence: 99%

Wind tunnel tests on the aerodynamic characteristics of vehicles on highway bridges

Xue

Zou

et al. 2020

Advances in Structural Engineering

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Accurately quantifying the aerodynamic forces acting on vehicles and long-span bridges is critical for assessing the safety of moving vehicles on bridges which are subjected to strong wind. It is necessary to consider the aerodynamic interference between vehicles and the bridge, especially for this with the bluff body section and wind barriers. However, very few investigations have been carried out to find aerodynamic coefficients of vehicles on a bridge with the bluff body section and considering the effect of wind barrier. This article therefore carried out wind tunnel tests to determine aerodynamic coefficients of container truck on a bridge with a π-cross section and wind barriers. The influence of vehicle position in different road lanes of the bridge deck and the aerodynamic interference between vehicles on the aerodynamic characteristics of the vehicle and the bridge are investigated. Different heights and ventilation ratios of wind barrier are taken into consideration to examine variations of aerodynamic coefficients with different wind barriers. Furthermore, the change mechanism in the aerodynamic coefficients of the vehicles is observed by analyzing the wind pressure distribution on the surface of the vehicles. The test results show that the different lane locations of the vehicle affect the aerodynamic coefficients significantly, as well as the aerodynamic interference between vehicles with transverse arrangement or longitudinal arrangement, especially for the side force coefficient. The existence of wind barrier reduces the side force coefficients of the vehicle remarkably. Such effects also vary with the ventilation ratio and height of wind barrier.

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Dynamic analysis of coupled wind-train-bridge system considering tower shielding and triangular wind barriers

Cited by 28 publications

References 20 publications

Effect of wind barriers on the flow field and aerodynamic forces of a train–bridge system

Effect of wind barriers on the flow field and aerodynamic forces of a train–bridge system

Train–track–bridge dynamic interaction: a state-of-the-art review

Wind tunnel tests on the aerodynamic characteristics of vehicles on highway bridges

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