Buffeting is a kind of wind-induced vibration phenomenon of long-span cable-stayed bridges which is easy to occur. Balanced cantilever method is widely employed for the construction of cable-stayed bridge. The maximum double-cantilever state is the most dangerous state of wind resistance. Through the aeroelastic model wind tunnel experiment, the buffeting response of a cable-stayed bridge in construction under skew winds is studied in this paper. The variation law of buffeting response with the wind yaw angle is compared between the two cases with and without pylon. The experimental results show that for the same wind yaw angle the lateral and vertical buffeting responses of the main girder increase with the wind speed approximately in a quadratic curve, while the torsional buffeting response tends to increase linearly. At the same wind speed, the buffeting response of the main girder presents non-monotonic changes with increased wind yaw angle. Under skew winds, due to the disturbing effect of the pylon and the influence of the three-dimensional flow field, the buffeting response of the main girder will be affected by the aerodynamic interference of pylon. When the wind yaw angle is small, the interference effect is not obvious, with the increase of wind yaw angle and wind speed, the interference effect begins to appear. Generally speaking, the aerodynamic interference of the bridge pylon on the buffeting responses can be ignored.

抖振是大跨度斜拉桥的一种风振现象，很容易发生。平衡悬臂法广泛用于斜拉桥的施工。最大双悬臂状态是风阻的最危险状态。通过空气弹性模型的风洞试验，研究了斜风作用下斜拉桥在建筑中的抖振响应。比较了有和没有电塔的两种情况下抖振响应随风偏角的变化规律。实验结果表明，对于相同的偏航角，主梁的横向和竖向抖振响应随风速大致呈二次曲线而增加，而扭转抖振响应趋于线性增加。在相同的风速下 主梁的抖振响应随风偏角的增加呈现非单调变化。在偏风作用下，由于塔架的干扰作用和三维流场的影响，主梁的抖振响应将受到塔架的气动干扰的影响。当风偏角较小时，干扰效果不明显，随着风偏角和风速的增加，干扰效果开始出现。一般而言，桥塔对抖振响应的气动干扰可以忽略。主梁的抖振响应将受到塔架的气动干扰的影响。当风偏角较小时，干扰效果不明显，随着风偏角和风速的增加，干扰效果开始出现。一般而言，桥塔对抖振响应的气动干扰可以忽略。主梁的抖振响应将受到塔架的气动干扰的影响。当风偏角较小时，干扰效果不明显，随着风偏角和风速的增加，干扰效果开始出现。一般而言，可以忽略桥塔对抖振响应的气动干扰。