Flutter stability selection study of a long-span steel truss suspension bridge with a combined deck plate

Comparing with the traditional beam-plate separation system,the aerodynamic per-formance of the steel truss with a combined deck plate is significantly different.By taking a sus-pension bridge with a combined deck plate as the engineering background,the aerodynamic per-formance of the bridge and aerodynamic optimizations of the deck configuration are studied in de-tail using the section model testing technique.To improve the flutter stability of the bridge,a se-ries of wind tunnel tests are conducted to investigate the effects of the upper central stabilized plate,the lower central stabilized plate and the horizontal stabilized plate on the flutter perform-ance of the main girder.According to the test results,the optimal aerodynamic measure is pro-posed to meet the requirements of the bridge wind resistance with consideration of structural safety,economy and aesthetic.The result can be taken as a reference for the design of aerody-namic performance of similar steel truss girder suspension bridges.