Taking west quay No.15 bridge reinforcement in Beijing as an example, the application of the steel-concrete composite structure in T girder bridge reinforcement engineering is analyzed in this paper, which focuses on the performance comparison before and after reinforcement such as the bearing capacity of the bridge (bending, shear), the dynamic characteristics (natural frequencies and natural period). Data analysis results show that Bridge bending and shear carrying capacity greatly increased

more »

... nd so as the dynamic characteristics by steel structure and mixed reinforcement method, which meets the requirements of the specification and provides an important basis for the same type of bridge reinforcement.