FRP cloth end anchoring device for shear resistant reinforcing of concrete beam

Abstract

The invention discloses an FRP cloth end anchoring device for shear resistant reinforcing of a concrete beam and relates to a concrete reinforcing device. The FRP cloth end anchoring device comprises two SMC pieces and two screws with nuts. The two ends of a fiber cloth are wound on the two SMC pieces correspondingly, and then the two screws with the nuts are closely attached to the surface of the beam to fix the two SMC piece. The purpose is to solve the problem that the FRP cloth is liable to fall off when externally attached to the beam, so that reinforcing loses efficacy, the property of a fiber material cannot be given to full play, and accordingly the utilization rate is decreased. Under the premise that a concrete beam structure is not damaged, debonding of the FRP cloth can be slowed down. Meanwhile, even though the FRP cloth debonds, the FRP cloth and the beam can make the combined action through the device till the FRP cloth fractures, the property of a reinforcing material can be given to full play, and the optimal shear resistant reinforcing is achieved.

Description

technical field [0001] The invention relates to a concrete beam reinforcement device, in particular to an FRP cloth end anchorage device for shear reinforcement of concrete beams. Background technique [0002] Fiber-reinforced composites (FRP) have many advantages such as high tensile strength, light weight, and corrosion resistance, and have been widely used in civil engineering reinforcement projects. At present, in actual engineering, epoxy resin is mostly used to paste FRP cloth on the surface of the beam for reinforcement. Although it can effectively improve the bearing capacity and stiffness of the beam, the defect of this method is that the bonding performance between the FRP cloth and the concrete beam is not enough. In the initial stage of loading, the FRP cloth can still work with the beam. As the load increases, the FRP cloth pasted on the surface of the beam begins to peel off, making the FRP cloth lose its shear bearing capacity. The peeling of the FRP cloth ca...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an FRP cloth end anchorage device for shear reinforcement of concrete beams. The SMC sheet of the device is provided with a circular groove matching the screw rod, so as to solve the problem that the bonding strength between the FRP cloth and the concrete beam is not enough to cause the FRP cloth to peel off. , leading to the problem of insufficient performance of FRP cloth

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