Computer Aided Design and Numerical Simulation of Dongming Yellow River Bridge Strengthened by a Cable-Stayed System

The main bridge of Dongming Yellow River Highway Bridge adopts prestressed concrete continuous rigid frame continuous beam structure. When it is tested, it is found that there are about 6000 cracks in the top plate, bottom plate and web of the box girder. Besides the side span, the box girder has downward deflection in the middle of the span, and the maximum downward deflection is 18.84cm. After the research, the reinforcement method of cable-stayed system with steel joists, steel brackets and other steel members added to the bridge and cable devices arranged from the middle span to both sides is adopted to solve the diseases caused by prestressed configuration, unreasonable structure and long-term creep, so as to ensure the safe operation of the bridge.