In view of the external prestressing reinforcement technology of bridge,this paper uses Dr.Bridge V4.0.2 program and plane bar structure calculation software to simulate the bearing capacity of a prestressed reinforced concrete bridge.According to the calculation results,through external prestressing reinforcement,the bearing capacity before and after reinforcement is compared and analyzed.The results show that the overall stability and bearing capacity of the bridge are significantly improved,the stress reserve at the lower edge of the mid-span section is increased,the maximum principal tensile stress of the main beam is reduced,and the mid-span deflection of the main beam is effectively controlled.The structural stiffness and safety reliability are improved,which provides theoretical basis and practical guidance for similar bridge reinforcement.
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