Concrete structure steel plate-fiber reinforce plastic (FRP) composite reinforcement method

Abstract

The invention provides a concrete structure steel plate-fiber reinforce plastic (FRP) composite reinforcement method, belonging to the technical field of civil engineering structure reinforcement. The method is characterized in that two sides of a steel disc are respectively provided with one hole which is matched with the diameter of a screw, the positions of the screws for installing anchors are respectively determined at two sides of a fiber cloth, the distance between the screws corresponds to that between the two holes on the steel disc, holes are drilled at the specified positions on a concrete member by a drill, and adhesives are injected; the screws are fixed; the concrete positions which are adhered to the fiber cloths are cleared out, the fiber cloths are adhered to the designed adhersion positions, and steel plates are laid on the adhered fiber cloths for compactness; and finally the steel discs are sleeved on the fixed screws in sequence, nuts and gaskets are sleeved on the screws, and torque is applied on the nuts by a torque wrench. The effects and benefits of the composite reinforcement method of the invention are as follows: the fiber cloths are more even due to being pressed by the anchors, thus stripping of the fiber cloths is delayed and the FRP material utilization is higher; and the steel plate anchors are used, and the steel plates are forced, thus the bearing capacity of reinforced beams is larger and the ductility is better.

Description

technical field [0001] The invention belongs to the technical field of civil engineering structure reinforcement, and relates to a concrete structure steel plate-FRP composite reinforcement method. Background technique [0002] The traditional mechanical anchoring method is to pass the anchor through the surface of the fiber cloth, which will cause the fiber cloth to be subjected to multidirectional forces and cause stress concentration near the perforation, resulting in a decrease in the strength of the fiber cloth and difficult determination of the analysis model, which limits this traditional reinforcement Application of the method in engineering. In recent years, some scholars have proposed a composite anchoring technology, which uses a screw to press the steel sheet on the fiber cloth to prevent the early peeling and damage of the fiber cloth. What this method utilizes is that the screw rod extrudes the steel sheet to realize the compacting effect on the fiber cloth, a...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the existing fiber cloth anchoring methods, the present invention provides a steel plate-FRP composite reinforcement method for concrete structures, which not only solves the problem of sudden failure due to the fiber cloth being a brittle material, but also improves the utilization rate of the fiber cloth , and the steel plate also participates in the stress, the reinforced beam has a higher bearing capacity and better ductility

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