Abstract:Based on Huaxi River Bridge in Jinxi Avenue in Guiyang City, the characteristics of long-span asymmetric continuous steel box girder bridge in bridge type scheme, ecological protection and landscape effect are analyzed to obtain a lightweight, transparent and aesthetically pleasing structural design scheme. By establishing the MIDAS Civil overall calculation model of the structure, the internal force distribution and the negative reaction force at the edge fulcrums of the small-span structure are studied, and the design optimization and improvement measures of the structure are put forward. According to the wind tunnel test results of the segmental model of the girder, the aerodynamic optimization measures are proposed to make the vortex-induced vibration and flutter performance of the structure meet the requirements of the specification. By using the design of STC composite steel bridge deck, the fatigue stress of steel bridge deck is reduced and the service life of pavement layer is improved.
