Research on Reinforcement Technology for Cover Beam Structures of in-service Bridge

In order to determine a suitable reinforcement technology for the cover beam structure of a bridge in service, a model of a bridge in Shanxi Province was created and analyzed. Three different reinforcement methods were simulated using the finite element method, and these methods were then compared and analyzed. The results indicate that all three reinforcement methods can enhance the bridge’s performance, with the effectiveness ranked as follows: increasing the cross-section, applying external prestress, and attaching steel sheets. Considering factors such as economy, feasibility, and safety, it is recommended to reinforce the cover beam of the bridge by strengthening the external prestressed ribs in combination with affixing steel plates. This approach not only effectively reduces the stress and displacement of the cover beam structure but also redistributes the stress on the cover beam. Importantly, this method does not hinder bridge traffic and minimizes the impact on the clearance under the bridge.