Carbon fiber composite material rib with spiral resin ribs at two ends and preparation method thereof

Abstract

The invention relates to a carbon fiber composite material rib with spiral resin ribs at two ends and a preparation method thereof; wherein a core part is a unidirectional carbon fiber reinforced epoxy resin matrix composite material, the end part of the rib material is used as an anchoring section, the outer surface of the anchoring section is provided with a continuous spiral rib structure, andthe middle section of the rib material is the outer surface of a plain circle. The volume content of the carbon fiber bundles in the rib material is 65%-78%. The cured resin on the surface of the ribmaterial can form a spiral rib or keep a smooth round state according to the purposes of different areas and requirements. With a bridge inhaul cable as an example, the two ends of a rib material aremachined into spiral rib structures to serve as anchoring sections, anchoring reliability can be improved, resin spiral ribs are formed on the anchoring sections, the middle section between the two anchoring sections is kept smooth and round, and uniform distribution of tensile stress is facilitated.

Description

technical field [0001] The invention belongs to the technical field of building materials, and mainly relates to a carbon fiber composite material bar with spiral resin ribs at both ends and a preparation method thereof. Background technique [0002] Carbon fiber composite reinforcement has the characteristics of light weight, high strength, corrosion resistance, fatigue resistance, and good shock absorption performance. Using it as a cable component in bridge cables has become a development direction for improving bridge span and durability. However, it is difficult to anchor carbon fiber composite tendons with smooth and round surfaces, which is the key factor restricting its widespread application at present. At present, four kinds of carbon fiber composite bars with concave-convex structure on the surface have been developed at home and abroad, which are used to increase the mechanical bite force between the surface of the bar and the anchoring material, and improve the ...

AI Technical Summary

Problems solved by technology

There are two problems in this method: one is that due to the winding of the F4 tape, the orientation of the internal continuous carbon fiber bundles fluctuates along the length direction of the reinforcement, resulting in a decrease in the tensile strength and elastic modulus of the reinforcement; the other is that after the F4 tape is wound , the surface of the reinforcement is uneven, and the friction force is very large during the process of pulling into the shaping mold and curing, which is prone to the problem of mold blocking

The surface of the reinforcement produced by this process has spiral resin ribs throughout the entire length, and the surface spiral resin ribs are mainly used to improve the anchoring performance at both ends of the reinforcement. function, and in order to manufacture the surface with spiral resin ribs, the multi-channel oven curing process outside the mold is adopted, which has the disadvantages of low heat transfer efficiency and low production efficiency

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