City track traffic U type beam

The invention discloses a U-shaped girder for urban rail traffic. A girder body is connected into a channel with a U-shaped section by a bottom plate, web plates on both sides and flange plates at the top of the web plates. The upper surface of the bottom plate is connected with a support rail platform, a power supply device, a power supply cable bearing body and a communication signal cable bearing body are fixedly connected along the length direction of the girder body, the web plates on both sides are asymmetric, wherein, a bending arc even wall thickness web plate is on one side and the flange plate connected with the top of the side web plate is a 7-shaped flange plate, namely, only an inward flange is arranged; a smooth and thickness-adding bending arc non-even wall thickness web plate with the exterior of medium-and-upper-sections thereof being prominent is on the other side, and the flange plate connected with the top of the web plate is a T-shaped flange plate, namely, an internal flange and an exter