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Small Box girder reinforcement
Prestressed CFRP plate
There are more transverse cracks in the midspan, and the flexural capacity and crack resistance of beams are strengthened. Prestressed CFRP plates are pasted longitudinally at the bottom of the box girder.
Bridge disease
There are more transverse cracks in the midspan, and the flexural capacity and crack resistance of beams are strengthened.
Construction difficulty
The width of beam bottom is only 1.2m, and 3 prestressed carbon fiber plates need to be installed.
Solution
Prestressed CFRP plates are pasted longitudinally at the bottom of the box girder. The size of the carbon plate is 26500mm x 100mm x 1.2mm, and the ultimate tensile stress is more than 2400KN., and the tensile strength is 288KN. The tensioning stress of this project is 800MPa, tensile force is 96KN.
