Effects of guardrails on wind environment for vehicles and aerodynamic stability for bridges with box girders

Guo, Junjie; Tang, Haojun; Li, Yongle; Wang, Zewen

doi:10.1177/1369433220956827

Cited by 5 publications

(1 citation statement)

References 22 publications

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“…Nevertheless, for some more complex mountainous terrain, building the corresponding terrain model becomes very complex, and the landform complexity can not be well-reflected. Therefore, some scholars have also studied many two-dimensional and three-dimensional terrain wind fields combined with CFD numerical simulation and compared them with the wind tunnel test results (Guo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Combined wind profile characteristics based on wind parameters joint probability model in a mountainous gorge

Zhang

Jiang

et al. 2022

Nat Hazards

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Long-span bridges in mountainous areas are greatly disturbed by wind, and the wind field in the mountain gorge bridge site is extremely complex. Therefore, it is of great engineering significance to accurately evaluate the wind field characteristics of this kind of terrain. In this paper, to enhance understanding of this kind of wind field, the wind field in a mountainous gorge is measured for a long time using wind radar, and the mean wind parameters is statistically analyzed.The results show that the mean wind parameters vary greatly under different wind directions, and the wind speed profile does not meet the power-law model. Therefore, a mixed model suitable for the wind speed profile in a mountainous gorge is proposed. Additionally, GEV distribution and Logistic distribution are found to be suitable for describing the distribution characteristics of wind speed and angle of attack, respectively. In addition, considering the correlation between wind parameters, this paper also constructs the joint probability model of wind speed and angle of attack at different heights by the Copula function. Thus, a combined wind parameters profile model is developed under different exceedance probabilities based on the inverse first-order reliability method (IFORM). This study can provide a reference for the construction of the joint probability model of wind parameters.

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Section: Introductionmentioning

confidence: 99%

Combined wind profile characteristics based on wind parameters joint probability model in a mountainous gorge

Zhang

Jiang

et al. 2022

Nat Hazards

Self Cite

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CFD Numerical Simulation of Wind Field and Vehicle Aerodynamic Characteristics on Truss Bridge Deck under Crosswind

Zhang

Zhang²,

Long³

et al. 2022

KSCE J Civ Eng

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Effects of wind barriers on the aerodynamic forces and driving safety of vehicles on a wide bridge girder at various angles of attack

Li,

Lin,

Dai

et al. 2024

Physics of Fluids

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This paper presents the effects of angles of attack (AOA) on the windproof effect of wind barriers and the driving safety of highway vehicles on a wide bridge girder. The aerodynamic force coefficients of the vehicles were obtained using the force measurement technique. Computational fluid dynamics simulations were employed to investigate the mean wind velocity field on the upper surface of the girder. A comparison was made between the aerodynamic forces on a vehicle at various AOA on a bridge deck with guardrails and a deck with wind barriers. The windproof effect of wind barriers at various AOA was accessed by the safety factor of a vehicle. The results showed that the maximum of the aerodynamic forces of vehicles was not typically observed at a 0° AOA. The windproof effect of wind barriers became more pronounced as the magnitude of the AOA increased. As AOA increases, the height of the low wind velocity zone above the deck shows an upward trend. Compared to the deck with the guardrails, the height of the low wind velocity zone was much higher in the presence of wind barriers. The increase in the height of the low wind velocity zone will result in a decrease in the aerodynamic side force and an increase in the rolling moment acting on vehicles. It is also noteworthy that the installation of wind barriers can cause a reduction of overturning and side-slip safety factors of vehicles at specific AOA. This suggests that the wind barrier may potentially compromise driving safety at specific AOA.

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Effects of guardrails on wind environment for vehicles and aerodynamic stability for bridges with box girders

Cited by 5 publications

References 22 publications

Combined wind profile characteristics based on wind parameters joint probability model in a mountainous gorge

Combined wind profile characteristics based on wind parameters joint probability model in a mountainous gorge

CFD Numerical Simulation of Wind Field and Vehicle Aerodynamic Characteristics on Truss Bridge Deck under Crosswind

Effects of wind barriers on the aerodynamic forces and driving safety of vehicles on a wide bridge girder at various angles of attack

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