On construction technology of transverse prestressing in cast-in-place beam

this paper analyzed the wide concrete girder mechanical behavior under transverse prestressing by the spatial finite element method(FEM).

To ensure the integrity of the girder and resist transverse bending due to dead load and service load,powerful transverse prestressing tendons were disposed in the diaphragms.

Research purposes: This paper analyzes the effect of the lateral prestressing tendon in top deck on the lateral calculation result of box beam.

The positive influence of transversely prestressed bars on the shear capacity of reinforced concrete beams was demonstrated primarily.

For tackling the difficult problem of box-girder web crack,coming up with a new strengthening technology Lateral Tension for Vertical Prestress,and then try to do a simulation analysis with the finite element analysis software,checking out the effect and feasibility,find a new way for the long-span prestressed concrete box-girder web crack strengthening.