Carbon fiber reinforced polymer rope anchor

Abstract

The invention discloses a carbon fiber reinforced polymer (CFRP) rope anchor, which comprises an anchor cylinder for anchoring a CFRP rope, a first plugging board, a second plugging board and an adhesive medium, wherein a conical through hole is coaxially formed in the anchor cylinder. The carbon fiber reinforced polymer rope anchor is characterized in that a clamping piece component surrounding the CFRP rope is arranged in the conical through hole in the free end of the anchor cylinder; and the anchor cylinder is filled with an anti-corrosion material. The carbon fiber reinforced polymer rope anchor has the advantages that compressive stress of the surface of the CFRP rope corresponding to the clamping piece component is far higher than that of the surface of the CFRP rope at other regions, so that the phenomenon of damage of the surface of the CFRP rope at a loading end due to stress concentration is avoided, the distribution form of the compressive stress in an anchoring region is substantially optimized, the internal stress is more rational, the size of the anchor is greatly reduced, and further, the anchoring performance is greatly improved, so that the anchoring efficiency coefficient of the anchor reaches 100 percent, and the anchor has good durability.

Description

technical field [0001] The invention relates to an anchor, in particular to a carbon fiber reinforced composite cable anchor. Background technique [0002] Carbon fiber reinforced polymer (CFRP) has excellent properties such as high strength, high modulus, corrosion resistance, fatigue resistance and low relaxation, and has been widely used in civil engineering. CFRP cables (consisting of dozens or hundreds of CFRP tendons) can be used as the main force-bearing components in long-span roofs, suspension bridges, cable-stayed bridges, arch bridges and prestressed structures. [0003] Most of the existing CFRP cable anchors use the inner cone anchor barrel to anchor the CFRP cable. The inner cone anchor barrel is coaxially opened with a tapered through hole. When assembling, put the CFRP cable into the tapered through hole first, then pour the bonding medium into the tapered through hole, so that the CFRP cable, the inner cone anchor tube and the bonding medium are fixed and b...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing CFRP cable anchors use the inner cone anchor barrel to anchor the CFRP cable. The inner cone anchor barrel is coaxially opened with a tapered through hole. When assembling, put the CFRP cable into the tapered through hole first, then pour the bonding medium into the tapered through hole, so that the CFRP cable, the inner cone anchor tube and the bonding medium are fixed and bonded, and finally connected The attached device thus completes the assembly. The anchorage implements the anchoring of the CFRP cable by the bonding stress at the interface between the internal CFRP cable and the bonding medium. The large-diameter end of the load-bearing end (corresponding to the small-diameter end of the tapered through hole) is linearly distributed from small to large, resulting in the phenomenon of compressive stress concentration on the surface of the CFRP cable at the load-bearing end. Premature damage of the cable leads to the occurrence of the phenomenon that the CFRP cable enters the failure state in advance, so that the design strength of the CFRP cable cannot be fully exerted, so this type of anchorage has the problems of unreasonable internal force and low anchoring efficiency; and Due to the unreasonable force of the CFRP cable in the anchorage area of ​​the existing anchorage, its volume is too large, the production cost is high, it is not conducive to assembly, and the maintenance cost is high in the later stage; in addition, the existing CFRP cable anchorage is not anti-corrosion function, resulting in poor durability of the anchoring system

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