The Effect of Local Reinforcement Of Prestressed Carbon Fiber Strip on Bridge As a Whole

(1) Prestressed carbon fiber strip can reinforce bridge structures that have certain damages and diseases, which can significantly reduce the tensile stress at the bottom of the reinforced beam, and the reinforcement effect is obvious. In addition, the lateral connection of the entire bridge can increase the bearing capacity of the unreinforced part of the beam to a certain extent, and produce a good overall effect.

(2) Prestressed carbon fiber strip strengthens the concrete bridge, and there are different degrees of tensile stress along the longitudinal, horizontal and vertical directions of the contact part of the carbon fiber strip and the concrete member. There is a tendency for the carbon fiber strip to peel off from the surface of the concrete. Improper handling will cause secondary damage to the structure, so measures should be taken to prevent it.

(3) The measured value of the reinforced bridge is basically the same as the stress change of the finite element simulation value, which shows that the established ANSYS model has a certain practicability. The finite element model can be used for simulation in actual engineering to predict the reinforcement effect of prestressed carbon fiber strip to strengthen the bridge