Strengthening And Widening Splicing Technology Research On Shi’an Expressway Precast Girder Bridge

Existing roads and bridges built in different periods, and most had been age-old. thequality of building materials and design load level was low, which made many bridges unableto meet the current needs of the large volume of traffic. Therefore, it studied existing bridgereinforcement and widening technology based on Shi’an expressway precast girder bridge.First, it assessed the carrying capacity of existing bridges. Considering the limit state, thenormal use of factors limit state and seismic requirements, it assessed the ability of itsultimate capacity weather meet the force requirements according to existing bridges at85or04specification highway loads.Secondly, contrary to the structure not meet the capacity requirements, it proposed bridgeand reliable reinforcement measures on increasing flexural and shear capacity of the bridge tomeet the normal requirements. It analyzed the structure of the ultimate bearing capacity ofreinforcement.Thirdly, contrary to the use not meet the capacity requirements, it proposed typicalwidening bridge for structural design and capacity analysis. Then it checked the stitchingdesign programs and capacity analysis structureFinally, it proposed conventional design method, applicable conditions, design elements,steps, etc., which could provide important reinforcement for the widening of the existingbridge theoretical basis and technical support.