通过风洞试验研究了大跨度矩形钢拱肋气弹模型在均匀流场和紊流场中3种攻角(-3º、0º、+3º)、多种偏角(0º~90º)条件下的涡振响应。研究结果表明：均匀流场中，发现了稳定的一阶反对称竖弯和对称竖弯涡振，紊流场中未发现明显稳定的涡振；均匀流场中，一阶反对称竖弯涡振振幅很小，风速较低，锁定区也很窄；一阶对称竖弯涡振振幅很大，风速较高，锁定区也很宽；1/4断面涡振振幅大于拱顶断面涡振振幅；可以认为当偏角大于10º时，矩形拱肋不会出现涡振。

Through wind tunnel tests in smooth and turbulent flows, the vortex-induced vibration responses of large-span steel arch rib rectangular aeroelastic model are investigated. Three kinds of attack angles (-3º, 0º, +3º), multiple yaw angles (0º~90º) cases are incorporated. The results show that: in smooth flows, stable 1st anti-symmetric vertical bending and symmetric vertical bending vortex vibration can be observed, which are not found in turbulent flows. The 1st anti-symmetric vertical bending vortex vibration amplitude is very small, with low wind speed and narrow lock-in area. Whereas the 1st symmetric vertical bending vortex vibration amplitude is large, with higher wind speed and wider lock-in area. Vortex vibration amplitude at 1/4 section is greater than that of the vaulted section. When the yaw angle is greater than 10º, vortex vibration does not appear for the rectangular rib.