Study on Wind Resistance Strategy and Stability Calculation of a Single-Span Suspension Bridge

A main span of 500m of rock tunnel anchor steel truss single span suspension bridge, Structure of the tower across the bridge, cross a large, soft, weak damping characteristics, and the bridge site at the complex terrain, the actual wind field is more disordered, so be checking the stability of the structure of the wind. Wind stability checking showed that the torsional flutter and torsional flutter separated flow is less than the critical velocity self-excited vibration of the main beam test wind speed, wind does not meet safety requirements. Therefore, an additional level of rigidity with the wind the cable, set the cross-slope index, increased truss width, the main cable using a single triangle boom, the use of space for the main cable, etc. to increase the stability of the bridge on wind resistance. After considering the construction of economic and structural terms, the final choice of the main cable space, the top cable from 1m, the main tower for the A-type tower program. The study on the stability of the same type of calculation of the bridge with the reference wind.