Combination beam-concrete beam mixing cable-stayed bridge system

The utility model discloses a combination beam-concrete beam mixing cable-stayed bridge system, which mainly comprises a combination beam, a concrete beam and a combination beam-concrete beam mixing section, wherein the combination beam and the concrete beam are connected together through the combination beam-concrete beam mixing section to form a cable-stayed bridge mixing main beam, the ends of the mixing main beam are respectively erected on the abutments of a starting point and an end point of a cable-stayed bridge, a mixing main beam body is erected on the abutments, the abutments are connected with a bridge tower, the bridge tower is provided with stay cables which respectively face the two sides, the stay cable at one side is connected with the combination beam of the mixing main beam, while the stay cable at the other side is connected with the concrete beam of the mixing main beam, the combination beam adopts a concrete bridge deck on a top surface of a steel girder, and the steel girder and the concrete bridge deck are connected together through shear bolts into a commonly-loading beam structure. The main span of the system is large, if the combination beam with small weight is adopted, the side span is small, and if the concrete beam with large weight is adopted, the self balance of the cable-stayed bridge system is benefited.