标题： 典型桥面板涡激振动的偏航风效应实验研究 显示英文标题

标题： Experimental Investigation of Skew Wind Effects on Vortex-Induced Vibration of Typical Bridge Decks

摘要： 本研究通过弹簧悬挂斜截面模型试验，探讨了偏航风效应对两种典型桥梁断面——闭合箱梁和双边梁——涡激振动（VIV）的影响。 实验在不同的风偏角和攻角下进行。 结果表明，VIV振幅和锁定范围随着偏航角的变化而明显变化，使得独立性原理（IP）不适用于这些配置。 在升降和扭转VIV中均观察到了升沉-扭转耦合现象，这是由于不对称端部段导致的重心偏心所致。 引入了一种新的数值算法，以校正不同偏航角下结构质量-阻尼参数变化对峰值VIV振幅的影响。 最不利的VIV响应出现在偏航风条件下，相对于正常风条件，闭合箱梁的升沉VIV最大振幅增加了约20.1%，扭转VIV增加了179.8%，双边梁的升沉VIV最大振幅增加了3.9%。 显示英文摘要

摘要： This study explores the skew wind effects on vortex-induced vibration (VIV) of two typical bridge decks-a closed-box girder and a twin-edge girder-through spring-suspended oblique section model tests. Experiments were conducted at various wind yaw angles and angles of attack. Results indicate that VIV amplitudes and lock-in ranges exhibit a clear variation with yaw angles, rendering the Independence Principle (IP) unsuitable for these configurations. A heave-torsion coupling phenomenon was observed in both heaving and torsional VIV, attributed to the eccentricity of the center of gravity due to asymmetric end segments. A novel numerical algorithm was introduced to correct peak VIV amplitudes for variations in structural mass-damping parameters across yaw angles. The most unfavorable VIV responses occurred under skew wind conditions, with maximum amplitudes increasing by approximately 20.1 percent for heaving VIV and 179.8 percent for torsional VIV in the closed-box girder, and by 3.9 percent for heaving VIV in the twin-edge girder, relative to normal wind conditions.