Extruded type anchorage device for FRP rib and anchoring method

Abstract

The invention discloses an extruded type anchorage device for an FRP rib and an anchoring method. The extruded type anchorage device comprises an anchor barrel, a sleeve, FRP rib, an extrusion die and an extruder, a chamfer is arranged at one end of the anchor barrel, a conical through hole extending in the center line of the anchor barrel is formed in the middle of the anchor barrel, the sleeve matched with the conical through hole is nested in the conical through hole, the outer surface of the sleeve is a wedge surface, a cylindrical center through hole matched with the FRP rib is formed in the middle of the sleeve, and the center lines of the conical through hole, the center through hole and the FRP rib are coincident. The anchoring method comprises the steps that the sleeve penetrates in the anchor barrel, and the wedge surface of the sleeve is attached to the conical through hole of the anchor barrel; the tail end of the FRP rib penetrates through the center hole of the sleeve and extends out of the end surfaces of the anchor barrel and the sleeve; an assembling piece is put in the extruder, and grease is evenly smeared on the outer surface of the anchor barrel; and the assembling piece of the anchor barrel, the sleeve and the FRP rib is jacked into the extrusion die by operating the extruder at a constant speed. The extruded type anchorage device for the FRP rib is safe and reliable, convenient to assemble and reasonable in inner stress and is a new anchorage device capable of exerting advantages of the FRP rib.

Description

technical field [0001] The invention relates to an extrusion type anchor for FRP bars and an anchoring method thereof. Background technique [0002] Fiber Reinforced Plastic (FRP) bars are integral bars formed by impregnating high-performance continuous fibers such as carbon fibers and glass fibers in resins with good corrosion resistance. FRP bars have excellent properties such as high strength, low specific gravity, corrosion resistance, and fatigue resistance, and are widely used in the field of civil engineering. However, as an anisotropic material, FRP tendons have high axial strength and low transverse strength, making anchoring difficult. Therefore, anchoring technology is a bottleneck problem restricting the engineering application of FRP tendons. [0003] Commonly used FRP tendon anchors are mainly divided into two types: bonded type and clip type. The advantage of the bonded anchor is that it does not cause damage to the FRP tendon, and the test piece can be prep...

AI Technical Summary

Problems solved by technology

However, for transversely isotropic FRP tendons, early fracture failure occurs due to local stress concentration during the anchorage process, and the high strength of FRP tendons cannot be fully utilized.

In addition, the extrusion anchor construction technology is also used for steel strands in engineering. The extruded elements and steel strands are extruded into the cone hole of the extrusion die through the extruder. Since the diameter of the extruded element is larger than the diameter of the cone hole, the extruded element It is tightly compressed on the steel strand, but the extrusion anchor technology is only used to anchor the steel strand

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