中文摘要：

与水平布置的理想并列圆柱不同,自然风作用下斜拉桥并列拉索的气动绕流具有明显的三维特征。以实际工程中的并列拉索为工程背景,研制了一套并列拉索尾流驰振模型风洞试验装置,发展了相应的试验方法。针对远距失稳区拉索尾流驰振现象,通过较为系统的模型风洞试验,讨论了模型索尾流驰振轨迹的特点,对比分析了拉索间距、来流风向角、来流风攻角等对下流索振动特性的影响。研究结论对斜拉桥拉索的抗风设计具有指导意义。

英文摘要：

The aerodynamic ambient flow around parallel cables in a cable-stayed bridge under natural wind has obvious three-dimensional features,which are different from the horizontal ideal parallel cylinders.With parallel cables in a real bridge regarded as an engineering example,a set of experimental rigs and the corresponding test methods in wind tunnel are developed to investigate the wake galloping of parallel cables.With focus on the phenomenon of wake galloping in a large spacing instability range,a series of wind tunnel tests were carried out.The characteristics of the track of the model cables are discussed when wake galloping occurs in the wind tunnel.The effect of cables distance,wind yaw angle and wind attack angle on the vibration of downstream cables is compared and analyzed respectively.The conclusions can direct the wind-resistant design of the cables in cable-stayed bridges.