Impact of System Change over Order on Multi-span Continuous Beam

Taking(48+4×80+48)m prestressed concrete continuous beam for example and applying PRBP bridge structure analysis software,simulation analysis is carried out in the construction process to calculate and analyze the internal force and displacement generated by the different system change over order in the construction of multi-span continuous beam cantilever according to the impact on bridge structure internal force and bridge alignment by system change over order.The result indicates that system change over order imposes only limited impact on the stress and displacement when continuous beam system is formed but a higher impact on the construction.At the same time,the dismantling occasion of temporary supports impose a higher impact on the internal force and displacement during the stage of beam installation.