Structural rehabilitation of existing box arch bridges

According to the project status of reinforced concrete arch bridges, such as arch sinking, concrete cracking, severely damaged building above the arch, and the overall stiffness degradation, Static, dynamic and stability effects of various rehabilitation ways were comparatively analyzed, which includes strengthening top plate, strengthening top plate and bottom plate together, changing buildings above the arch. The results show that the strengthening way of changing building above the arch can improve the static performance of the bridge, the way of thickening the top plate of the box arch can improve the dynamic and stability properties.