Aerodynamic effect of wind barriers and running safety of trains on high-speed railway bridges under cross winds

Guo, Weiwei; Xia, He; Karoumi, Raid; Zhang, Tian; Li, Xiaozhen

doi:10.12989/was.2015.20.2.213

Cited by 54 publications

(16 citation statements)

References 32 publications

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“…To reduce the influence of strong crosswinds, wind barriers are commonly built because of their low costs and high effectiveness. Similarly, windbreak types and their effectiveness on bridges (Guo et al, 2015;He et al, 2019;Zhang, Gao, et al, 2013;Zhang, Xia, et al, 2013), embankments (Avila-Sanchez et al, 2010Gao & Duan, 2011) and flat ground (Hashmi et al, 2019;Yang et al, 2011;Zhang et al, 2017;Zhang, He, et al, 2019) have been studied to protect trains. In addition, due to the effects of the terrain, wind-reducing facilities are discontinuous and sometimes generate transition areas between different landforms, such as the windbreak transition induced by a regular windbreak and an open-hole tunnel or between a cutting and an embankment, bridge, or a tunnel (Deng et al, 2019;Sun et al, 2019Sun et al, , 2020Wang, 2010).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical research on wind characteristics affected by actual mountain ridges and windbreaks: a case study of the Lanzhou-Xinjiang high-speed railway

Chen

Liu

et al. 2020

Engineering Applications of Computational Fluid Mechanics

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To reduce the impact of a mountain ridge on the crosswind flow field of a specific section of the Lanzhou-Xinjiang high-speed railway, a portion of the mountain ridge was removed to increase the distance from the windbreak. To verify the effects of this flow optimization measure, the wind speed and wind angle were tested in this mountain ridge region. In this paper, under the actual conditions of this specific case study, the average and transient wind characteristics were analyzed based on the test results. Then, based on the actual terrain model, using the computational fluid dynamics (CFD) method with two inlet boundary conditions, namely, constant wind and exponential wind, the results obtained from the two boundary conditions were validated. Furthermore, the visualized flow structures and wind speed distributions along the railway under both boundary conditions were compared. Finally, along the railway, the impacts of different terrain types on the flow field of the railway were compared.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical research on wind characteristics affected by actual mountain ridges and windbreaks: a case study of the Lanzhou-Xinjiang high-speed railway

Chen

Liu

et al. 2020

Engineering Applications of Computational Fluid Mechanics

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“…7,8 The utilization of wind barriers has been demonstrated to be a promising and practical strategy and is becoming increasingly popular in engineering practice. 9–11…”

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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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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“…e wind-resistant performance of existing bridge structures will inevitably deteriorate due to the influence from synthetic factors, such as concrete carbonation, reinforcement corrosion, and accumulated fatigue damage, which can threaten the entire bridge safety [1][2][3][4][5]. For example, the boundary beam of the SR1014 Bridge in Pennsylvania laterally collapsed mainly due to serious performance deterioration [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Wind-Resistant Performance of Long-Span Cable-Stayed Bridge Using the Monitoring Correlation between the Static Cross Wind and Its Displacement Response

Gao-xin

Feng

2018

Shock and Vibration

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The wind-resistant performance of existing long-span cable-stayed bridge structures will inevitably deteriorate due to concrete carbonation, reinforcement corrosion, accumulated fatigue damage, etc., which can threaten the entire bridge safety. However, few studies currently focus on assessing the wind-resistant performance of existing long-span cable-stayed bridge structures, and at present, no studies have revealed how to identify the deterioration of the wind-resistant performance using a bridge health-monitoring technique. Therefore, based on the health-monitoring system installed on the Sutong Cable-stayed Bridge, the monitoring wind field and GPS displacement are captured to analyze the wind-resistant performance. First, the correlation between static cross wind and transversal displacement is analyzed, which is nearly linear but also contains discrete points caused by environmental noise. Second, considering that the discrete points can decrease the identification accuracy, one new method called the cross-correlation analysis of wavelet packet coefficients is put forward to effectively remove the discrete points. Third, considering that the traditional function cannot match the monitoring correlation very well, some new fitting functions are thoroughly studied to determine the best function for fitting the monitoring correlation. Fourth, the abnormal variation in the monitoring correlation caused by a deterioration in the wind-resistant performance is studied, and the root-mean-square (RMS) variable, which represents the difference between a good service state and a deteriorated service state, is used as a detection indicator to identify the deterioration of wind-resistant performance. Finally, the monitoring data from ten months are selected to evaluate the wind-resistant performance of the Sutong Bridge, and the result shows that its wind-resistant performance was still in a good service state during these ten months.

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Aerodynamic effect of wind barriers and running safety of trains on high-speed railway bridges under cross winds

Cited by 54 publications

References 32 publications

Experimental and numerical research on wind characteristics affected by actual mountain ridges and windbreaks: a case study of the Lanzhou-Xinjiang high-speed railway

Experimental and numerical research on wind characteristics affected by actual mountain ridges and windbreaks: a case study of the Lanzhou-Xinjiang high-speed railway

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

Evaluation of the Wind-Resistant Performance of Long-Span Cable-Stayed Bridge Using the Monitoring Correlation between the Static Cross Wind and Its Displacement Response

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