A composition Beam - mixing concrete beam system Cable - stayed

The invention discloses a combination beam-concrete beam mixed cable stayed bridge system, which mainly comprises combination beams, concrete beams and combination beam-concrete beam joint sections, wherein the combination beams and the concrete beams are connected together through the combination beam-concrete beams joint sections along the longitudinal direction to form mixed main beams of a cable stayed bridge; the beam ends of the mixed main beams are erected on piers at the start and end points of the cable stayed bridge respectively; the beam bodies of the mixed main beams are erected on the piers; the piers are connected with bridge towers; both sides of each bridge tower along the longitudinal direction of the bridge are provided with stayed cables respectively; the stayed cables on one side are connected with the combination beams of the mixed main beams; the stayed cables on the other side are connected with the concrete beams of the mixed main beams; and each combination beam has a beam structure in which a concrete bridge panel is adopted for a steel beam top surface and a steel beam and the concrete bridge panel are connected integrally through a shearing bolt and arestressed together. Due to the adoption of the system, the span of a main span is large; the combination beams of which the deadweights are small are adopted, so that the span of a side span is small;and the concrete beams of which the deadweights are large are adopted, so that self-balance of the cable stayed bridge system is facilitated.