Influences of Construction Sequence of Simple-supported Beam to Continuous Beam Bridges on Internal Force of Structure

Tension of negative moment prestressed reinforcements twice and removal of temporary supports are key working procedures in construction of bridges with simple-supported beam to continuous beam structural system,and different construction sequences will produce different influences on internal force of structure.Based on a 4-span 50mT beam project as an example,this paper calculates and analyzes different construction procedures for tension of negative moment prestressed reinforcements twice and removal of temporary supports.The results of analysis show that both the sequences of prestressed tension of wet joints on beam ends and removal of temporary supports produce a certain influence on internal force of structure.