Effects of wind-barrier parameters on dynamic responses of wind-road vehicle–bridge system. Issue 206 (November 2020)

• Record Type: Journal Article
• Authors: Xue, Fanrong; Han, Yan; Zou, Yunfeng; He, Xuhui; Chen, Suren
• Is Part Of: Journal of wind engineering and industrial aerodynamics. Issue 206(2020)
• Publication Date: 2020-11
• Subjects: Wind barrier -- Wind-vehicle-bridge system -- Height -- Ventilation ratio -- Aerodynamic force coefficient -- Dynamic response; DOF degrees-of-freedom -- FEM Finite element method -- FFT Fast Fourier transform -- PSD Power spectral density; Wind-pressure -- Periodicals; Buildings -- Aerodynamics -- Periodicals; Pression du vent -- Périodiques; Constructions -- Aérodynamique -- Périodiques; Buildings -- Aerodynamics; Wind-pressure; Periodicals
• DOI: 10.1016/j.jweia.2020.104367
• Languages: English
• ISSNs: 0167-6105

Abstract

Abstract: Accidents, such as deflections, side slips, and even rolls, can easily occur when road vehicles moving on the bridge deck at high speed are subjected to sudden changes owing to strong crosswinds. Wind barriers are an effective way to ensure the driving safety of vehicles on the bridge but with potential negative influences on the aerodynamic performance. Therefore, it is critical to evaluate the shielding effect of wind barriers on road vehicles by assessing the overall impact on the vehicle–bridge system. To optimize the wind-barrier scheme, a series of wind tunnel tests is conducted to evaluate the effects of barrier parameters on the aerodynamic characteristics of the wind-vehicle-bridge system. In this study, the aerodynamic force coefficients of the wind–vehicle–bridge system installed with wind barriers with four different heights and three ventilation ratios were investigated. With wind barriers installed on the bridge deck, dynamic responses of the wind–vehicle–bridge system were simulated with the proposed prediction procedures as those used in an earlier study. Results show that wind barriers on the bridge deck have significant influences on the aerodynamic force coefficients of the bridge, especially on the side-force coefficients, and on the dynamic responses of the wind–vehicle–bridge system. Additionally, the increase of the barrier height and the decrease of the barrier ventilation ratio considerably increase and decrease the lateral and torsional displacements of the bridge and the vehicles, respectively, but with only minor influence on the vertical displacements of both bridges and vehicles. Therefore, it is necessary to include the wind barrier in both experimental and numerical simulations of the wind-road vehicle-bridge system to explore the effect of different barrier parameters on the wind-vehicle-bridge system. Highlights: We manufactured models of a π-section bridge model and a high-sided vehicle model for wind tunnel tests. Various cases on aerodynamic coefficients ​of wind-vehicle-bridge system ​installed different barrier parameters are studied. Dynamic responses of wind-vehicle-bridge system ​were calculated by previous prediction procedures. Exploring effects of wind barriers on ​experimental and numerical simulation ​of wind-vehicle-bridge system ​was necessary.