ABSTRACT
Bridge reinforcement is to meet the requirements. Reinforcement can improve the durability of the bridge and extend the service life of the bridge. That is to say, using less capital investment to consolidate the bridge to meet the demand of traffic volume can also ease the investment in the bridge, reduce capital investment, and avoid traffic accidents as far as possible, which is the significance of bridge reinforcement. With the continuous development of the modern economy and technology, the number of vehicles on the road is gradually increasing. Traffic accidents occur frequently, which has attracted people's attention. Therefore, how to improve the safety of the bridge has become an urgent problem. In this paper, the mathematical model is established first, and the finite element analysis model of the structure is constructed by using the discrete method. In the process of the optimization cycle, the finite element mesh of the structure is divided. It is assumed that there are support constraints at the nodes of the finite element model, which is to determine the most effective support movement scheme. Finally, the maximum displacement of the structure continues to decrease, gradually approaching the optimal solution. That reinforced bridge changes the original structural system by adding supports. It reduces the calculated span, and carries out internal force redistribution, thereby reducing the tensile stress borne by the main beam and effectively improving the bearing capacity of the main beam. It has a good reference significance for the construction of the new steel structure system.
