Carbon fiber cable strand inner sleeve conical bonded anchorage device

Abstract

The invention discloses a carbon fiber cable strand inner sleeve conical bonded anchorage device. In the carbon fiber cable strand inner sleeve conical bonded anchorage device, a reinforced thread reinforcing steel bar is arranged on the outer side of a sleeve; an axial wedge-shaped hollow groove is formed in the sleeve; and a wedge tip of the hollow groove faces the small hole end of an anchor ring conical hole. By the anchorage device of the invention, the condition of non-uniform transverse and longitudinal stress of carbon fiber reinforced plastic (CFRP) cable strands can be improved; the anchorage device can be prestressed; all the CFRP wires can exert limit bearing capacity at the same time; the anchoring efficiency is improved; the anchoring efficiency coefficient can reach 100 percent; and the anchorage device has excellent static performance and dynamic performance and low manufacturing cost, is simple and convenient in assembly and is easy in construction.

Description

Technical field [0001] The invention relates to civil engineering anchors, especially the technical field of carbon fiber polymer reinforcement (CFRP) anchoring equipment. Background technique [0002] Compared with steel strands, CFRP bars have outstanding advantages such as high tensile strength, corrosion resistance and low relaxation, and can be widely used in civil engineering, especially bridge cables. The anchors of CFRP cable strands are generally bonded anchors. Due to the large number of CFRP wires anchored by the bonded anchors, the CFRP wires inside the anchors are not uniformly stressed, mainly in the horizontal and vertical directions: horizontally, outer edges CFRP wire is the most unfavorable force. The center CFRP wire is broken before the ultimate strength, and the ultimate strength of all CFRP wires cannot be exerted. In the longitudinal direction, the radial compression stress on the strands is uneven and the stress concentration is serious, which leads to the...

AI Technical Summary

Problems solved by technology

The anchors of CFRP cable strands are generally bonded anchors. Since there are many CFRP wires anchored by bonded anchors, the CFRP wires inside the anchorage are unevenly stressed, mainly in the horizontal and vertical directions: in the horizontal direction, the outer edge The CFRP wire is the most unfavorable to the force, and the central CFRP wire is destroyed before it reaches the ultimate strength, and the ultimate strength of all CFRP wires cannot be exerted; in the longitudinal direction, the radial extrusion stress on the strands is uneven, and the stress concentration is serious, resulting in the Strands are sheared in areas of high compressive stress

The above unfavorable factors lead to poor anchoring performance of some existing anchorages. Although other anchorages have better anchorage performance, their structures are complex, which brings a lot of inconvenience to production and assembly. Therefore, there is an urgent need for a high-efficiency, easy-to-manufacture and Assembled new bonded anchors

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