bridge engineering;  cable-stayed bridges;  Lasso;  drag coefficient;  Wind tunnel testing

The wind tunnel test method was used to study the resistance coefficient of the bridge at different inclination angles of four different surfaces (including one light cable, two spiral cues and one pit cable) at different inclination angles. The test results show that the resistance coefficients of pit cable and 4mm spiral clue are not much different, and they can be applied to the design of cable-stayed bridge. According to the experimental results, a relatively simple fitting formula for calculating the resistance coefficient value of the cable-stayed cable at different inclination angles is given. The analysis shows that this fitting formula and the experimental results fit well and are safe.