Abstract:Wind load and wind-induced vibrations of stay cables are of great concern in engineering design and wind resistance research fields. Therefore,it is necessary to explore a new type of stay cable with less aerodynamic force and excellent wind-resistant performance. To this end,a wavy stay cable was employed to study the overall aerodynamic forces,wind pressure distribution,local forces,vortex-induced vibration and dry galloping characteristics,based on a wind tunnel test. The test results indicate that,during the Reynolds number range of 1.00×105~ 3.86×105,mean drag coefficients of the wavy stay cable are generally less than those of regular stay cables,with a maximum reduction of 18% in low Reynolds numbers. The maximum mean lift coefficients are decreased by around 80%. Variation in wind pressure distribution and aerodynamic forces with the Reynolds number is almost identical to those of regular stay cables,except for weaker spanwise correlation. The vortex-induced vibration is significantly suppressed by the wavy stay cable,whose maximum amplitude is decreased by 34% and the corresponding velocity is increased by 16%. However,dry galloping is nearly the same as regular stay cables,whose maximum amplitude is decreased by 5% and sustained wind velocity range is wider.