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.

中文翻译：

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风障参数对风车桥系统动力响应的影响

摘要 道路车辆在桥面高速行驶时，在强侧风作用下发生突变，容易发生偏转、侧滑甚至侧倾等事故。风障是保证车辆在桥上行驶安全的有效方式，但对空气动力学性能有潜在的负面影响。因此，通过评估对车桥系统的整体影响来评估风障对道路车辆的屏蔽效果至关重要。为了优化风障方案，进行了一系列风洞试验，以评估风障参数对风车桥系统气动特性的影响。在这项研究中，研究了安装有四种不同高度和三种通风比的风障的风-车-桥系统的空气动力系数。风障安装在桥面上，风-车-桥系统的动态响应被模拟为早期研究中使用的预测程序。结果表明，桥面风障对桥梁的气动力系数，尤其是侧向力系数，以及风-车-桥系统的动力响应有显着影响。此外，屏障高度的增加和屏障通风率的降低分别显着增加和减少了桥梁和车辆的横向和扭转位移，但对桥梁和车辆的垂直位移影响很小。因此，有必要在风-车-桥系统的实验和数值模拟中都包括风障，以探索不同的障碍参数对风-车-桥系统的影响。