中文摘要：

桥梁主梁结构涡激振动具有三维特性,主梁涡激力沿展向并不完全同步。在均匀流场条件下针对宽高比为5的矩形断面主梁分别进行了振动状态和静止状态风洞试验,对其气动力、尾流风速、表面压力展向相关性等进行研究。结果表明：振动状态矩形断面主梁气动力展向相关系数比静止状态大,涡振锁定区内升力系数相关系数最大值位于锁定区间上升段而非振幅最大处。振动状态矩形断面主梁尾流区顺风向及竖向脉动风速展向相关系数小于其气动力展向相关系数;静止状态矩形断面主梁尾流区顺风向脉动风速和竖向脉动风速展向相关系数沿展向距离呈指数衰减,且不同风速下对应的衰减曲线比较接近。

英文摘要：

The vortex-induced vibration of the bridge deck is of three-dimensional characteristics, and the vortex-exciting forces on the bridge deck are not completely synchronous in spanwise direction. The wind tunnel tests of the stationary and oscillating rectangular section girder with aspect ratio of 5 in smooth flow were conducted to investigate the spanwise correlation coeffi- cients of the aerodynamic forces, the turbulent wind in the wake and pressures on the rectangular section girder. The research results show that the spanwise correlation coefficients of the aerodynamic forces of the oscillating rectangular cylinder are larger than that of the stationary rectangular cylinder. The maximum spanwise correlation coefficients of the lift coefficients of the rectangular cylinder are located in the ascending side of the lock-in region rather than the maximum amplitude. The spanwise correlation coefficients of the longitudinal and vertical turbulent wind in the wake of the oscillating rectangular cylinder are less than that of the aerodynamic forces of the cylinder. The spanwise correlation coefficients of the longitudinal and vertical turbu- lent in the wake of the stationary rectangular cylinder decrease exponentially with the increasing of the distance in spanwise di- rection. And the corresponding decay curves for different wind speeds are similar to each other.