Aerodynamic performance of a novel wind barrier for train-bridge system

He, Xuhui; Shi, Kang; Wu, Teng; Zou, Yunfeng; Wang, Hanfeng; Qin, Hongxi

doi:10.12989/was.2016.23.3.171

Cited by 28 publications

(16 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was reported in [ 13 ] that the airflow speed may not obviously affect these aerodynamic coefficients for the train for a given height and porosity of the wind barrier. Therefore, the aerodynamic coefficients were measured at a specified airflow speed level, e.g., 10 m/s, according to [ 10 ]. However, since GFRP wind barriers with relatively low stiffnesses were used in this study, obvious deformation was expected when a crosswind was applied.…”

Section: Wind Tunnel Experimentsmentioning

confidence: 99%

“…Wind tunnel tests [ 6 , 7 , 8 , 9 ] and numerical modelling [ 10 , 11 , 12 , 13 ] have been conducted to investigate the associated parameters to understand the aerodynamic performance of wind barriers and trains. For example, the effects of airflow speed, train speed and wind directions on the aerodynamic performance of a train with a rigid wind barrier were investigated through wind tunnel tests.…”

Section: Introductionmentioning

confidence: 99%

“…Several railways are supported on bridges [ 8 ]; therefore, the safety consideration for both travelling trains and supporting bridges with wind barriers needs to be addressed. Recently, louver-type wind barriers with adjustable blades were introduced [ 10 , 16 ], where the porosity of the wind barriers can be adjusted by changing the incline angle of the blades. For example, during regular conditions (i.e., without a strong crosswind), the wind barriers can be given a low porosity (achieved by putting the blades in closed mode) and better shielding effects can be provided to mitigate the wind effects on the train; meanwhile, during the presence of a strong crosswind, where the train trips are cancelled or during their intermission, the wind barriers can be adjusted to have high porosity (i.e., by opening the blades) and therefore cause a lower load to be transferred to the bridge.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges

Dai

Bai

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

Wind barrier structures on railway bridges are installed to mitigate the wind effects on travelling trains; however, they cause additional wind loads and associated aerodynamic effects on the bridge. An innovative concept was developed for a wind barrier structure in this study that used a glass–fibre–reinforced polymer (GFRP) that may deform properly when subjected to a crosswind. Such deformation then allows for wind to pass, therefore reducing the wind loads transferred to the bridge. Wind tunnel experiments were conducted on a 1/40-scale train and bridge models with the proposed GFRP barrier subjected to airflow at different speeds up to 20 m/s. The side-force and overturning-moment coefficients of both the train and the bridge were evaluated to characterise the aerodynamic effects. The results show that favourable side-force and overturning-moment coefficients of the train were provided by wind barriers taller than 10 cm. The aerodynamic coefficients of the train were not significantly affected by the airflow speeds; meanwhile, the overturning-moment coefficient of the bridge decreased with the increase in airflow speed due to smaller wind resistance of the barrier after deformation. A numerical analysis was conducted on both the reduced- and full-scale models of the train–barrier–bridge system and the results supported the findings obtained from the wind tunnel experiments.

show abstract

Section: Wind Tunnel Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges

Dai

Bai

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Besides, when a train passes by with a very high speed, the effects of slipstream and shock waves on the wind barrier should also be considered. In recent years, many researchers did substantive research in the field of the aerodynamic performance of wind barriers, through wind tunnel tests (Guo et al, 2015;He et al, 2014He et al, , 2016 and computational fluid dynamic (CFD) simulations (e.g. Catanzaro et al, 2016;He et al, 2018;Krajnović et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the crosswind effects on a train running on a bridge

Zou

Wang

2020

Engineering Applications of Computational Fluid Mechanics

Self Cite

View full text Add to dashboard Cite

“…He et al. 6 further proposed an adjustable, louver-type wind barrier to improve the running safety and ride comfort of a train on a bridge under crosswind conditions. Guo et al.…”

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:

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Aerodynamic performance of a novel wind barrier for train-bridge system

Cited by 28 publications

References 21 publications

Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges

Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges

Numerical investigation on the crosswind effects on a train running on a bridge

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

Contact Info

Product

Resources

About