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强横风下大跨缆索承重桥梁的桥塔附近桥面风环境交替变化显著,极易导致汽车侧向失稳事故,针对途经桥塔附近桥面汽车气动力特性的研究对评价汽车侧向操纵稳定性尤为重要。该文进行了某分离钢箱梁斜拉桥独柱式桥塔附近桥面汽车模型测力风洞试验,获得了横风下汽车途经桥面不同位置时气动力特性的一般规律。设置风障前后桥塔附近桥面汽车气动力系数对比分析表明:风障可显著减小该类桥型塔区桥面汽车的侧力系数和横摆力矩系数,可减小大体量汽车的侧倾力矩系数和中、小体量汽车横摆力矩系数的变化幅值,风障对提高大风天途经桥塔附近桥面汽车的侧向稳定性作用明显。
The wind environment around the pylon near the bridge tower of the bridge with large span cable under the typhoon wind alternates obviously, which can easily lead to the vehicle lateral instability accident. In view of the research on the aerodynamic characteristics of the bridge passing near the pylon, Sex is especially important. In this paper, a wind tunnel test of a car model bridge deck near a steel box girder cable-stayed bridge is carried out, and the general law of aerodynamic characteristics is obtained when the car passes through different positions on the bridge deck. Comparison of the aerodynamic coefficients of the car near the bridge tower before and after the wind barrier shows that the wind barrier can significantly reduce the lateral force coefficient and yaw moment coefficient of the bridge deck car and can reduce the side of the car Tilting moment coefficient and small and medium volume vehicle yaw moment coefficient of amplitude, wind barrier to improve the windy day through the bridge near the bridge side of the vehicle a significant role in lateral stability.