Simulation calculation of twice-tension prestressed steel in continuous girder bridge

In order to reduce the creep effect of the long-span prestressed bridge, a new construction method of twice-tension prestressed steel is adopted, and by using the finite element analysis software, modeling is conducted to the one girder and four spans of a continuous girder bridge in a real project, calculation of various aspects such as the displacement and deformation and internal force on cross section and loss of prestress were made in different construction phases; in this way, the feasibility of this construction method is made, and data for calculation is prepared for the promotion of this tensioning scheme.