Circular punching accessory with high utilization rate of corrugated web girder

The utility model discloses a circular punching accessory with a high utilization rate of a corrugated web girder. The circular punching accessory comprises a top flange steel plate, a bottom flange steel plate, a circular punching flat web plate, a punching circular tube, short stiffening ribs and connecting plates, wherein the circular punching flat web plate is arranged between the top flange steel plate and the bottom flange steel plate; the punching circular tube is arranged on the periphery of a circular punched hole; the connecting plates are arranged on two side edges of a rectangular punching flat web plate; the transverse short stiffening ribs are arranged between the punching circular tube and the connecting plates; the connecting plates are connected with a connecting plate of the corrugated web girder through bolts; all components of the circular punching accessory are connected with one another through welding. By adopting the circular punching accessory disclosed by the utility model, the pheno