CN103758289A - Strand tapered anchorage for tension of carbon fiber plate - Google Patents

Abstract

The invention relates to a clip-type anchor for tensioning a carbon fiber plate, comprising an anchor plate and a clip. The anchor plate has a square hole for installing clips, and the two extruded surfaces have an inclination angle of 1-5°, and the inclination angle on the outside of the clip is 0.1-1° larger than the inclination angle on the corresponding anchor plate. The inclination difference between the clip and the anchor plate makes the side of the clip receive a uniform clamping force after the clip is loaded into the anchor plate, and the carbon fiber plate is not broken at the tip of the clip due to stress concentration, which avoids damage to the carbon fiber plate Destruction improves the anchoring effect of the anchorage.

Description

Clip Anchors for Carbon Fiber Plate Tensioning

technical field

The invention relates to a clip-type anchor for tensioning a carbon fiber plate, which belongs to the technical field of carbon fiber plate reinforcement.

Background technique

Carbon fiber plate has the advantages of light weight and high tensile strength, so it is an ideal reinforcement material. It has excellent application prospects in the reinforcement of steel structures.

To strengthen the steel structure with carbon fiber plates, it is necessary to fix both ends of the carbon fiber plates with anchors, and then fix the anchors to the steel structure, so anchors are a key technology in the reinforcement technology of carbon fiber plates.

As shown in Figure 1, the currently used anchor includes an anchor plate 1 and a clip 2. The inner surface of the anchor plate 1 has a certain inclination angle, and the inclination angle of the outer surface of the clip 2 is the same as that of the anchor plate 1. Clamp the carbon fiber plate 3 with two clips 2 and assemble it into the anchor plate 1. When the carbon fiber plate 3 is stretched, the clip 2 is squeezed by the anchor plate 1, and the carbon fiber plate 3 is tightened to realize the anchoring of the carbon fiber plate 3 .

Because the inclination angle of the clip and the anchor plate is the same, the clip is easy to fall off from the anchor plate. Moreover, during processing, for the convenience of assembly, the inclination angle of the anchor plate is usually made slightly larger than that of the clip, so that during use, the tip of the clip is subjected to greater extrusion force, which easily damages the carbon fiber plate.

Contents of the invention

The object of the present invention is to provide an anchor to solve the problem of the carbon fiber plate being broken at the tip of the clip in view of the above-mentioned deficiencies in the prior art.

Technical scheme of the present invention is as follows:

An anchor for carbon fiber plate tensioning, including an anchor plate and a clip, the anchor plate has a square hole for installing the clip, the two squeezed surfaces of the square hole have an inclination angle of 1-5°, and the clip is installed In the square hole, the inclination angle of the outside of the clip is 1.1-6°, and the inclination angle of the clip is 0.1-1° larger than that of the anchor plate.

As a preferred solution, the inclination angle of the anchor plate is 1.5-2.5°.

As a preferred solution, the inclination angle of the clip is 0.2-0.3° larger than that of the anchor plate.

The beneficial effect is: the clip has a larger inclination angle than the anchor plate, so that after the clip is installed in the anchor plate, the side is subjected to a uniform clamping force, and the carbon fiber plate is not broken at the tip of the clip due to stress concentration, avoiding the problem The damage to the carbon fiber plate improves the anchoring effect of the anchorage.

Description of drawings

Accompanying drawing 1 is the sectional view of anchorage of prior art.

Accompanying drawing 2 is the cross-sectional view of the anchorage of the present invention.

Detailed ways

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figure 2, the shape of the anchor plate 21 is a cuboid with a length of 100mm, a width of 100mm, and a height of 50mm, with a square hole in the middle, the width of the square hole is 50-70mm, the height is 20-30mm, and two receiving holes with a width of 50-70mm. The extrusion face has an inclination of 2°. The profile of clip 22 is a cuboid with a length of 100mm and an inclination angle of 2.5° on the outside.

Clamp the carbon fiber plate 23 with the clip 22 and assemble it into the anchor plate 21. After pre-tightening, the large mouth end of the anchor plate 21 is slightly deformed to form a clamping force on the squeezed surface of the clip 22. Because the inclination angle of the clip 22 is greater than that of the anchor plate 21, the force on the tail of the clip is greater and the force on the tip is slightly smaller. Stress concentration at the tip will cause the carbon fiber plate 23 to break at the tip, resulting in aging of the anchorage; while the force at the tail is slightly larger, which will not cause failure. Moreover, in the state of use, the anchor plate 21 continues to deform under stronger tension, and the clamping force of the tip and tail of the clip 22 on the carbon fiber plate 23 will tend to be more consistent. Moreover, the clamping force of the anchor plate on the tail of the clip is slightly larger, which makes the clip more difficult to fall off, can reduce the pre-tightening force, and is beneficial to the assembly operation.

Compared with the prior art, the inclination angle of the clip is larger than that of the clip installation hole of the anchor, which solves the problem that the carbon fiber plate is prone to fracture at the tip of the clip and improves the anchoring effect of the anchor.

The present invention may be embodied in other specific forms without departing from the spirit or main characteristics of the invention. Therefore, any changes within the meaning and scope equivalent to the claims of the present invention should be considered to be included in the scope of the claims.

Claims (3)

1. An anchor for carbon fiber plate tensioning, characterized in that it comprises an anchor plate and a clip, the anchor plate has a square hole for installing the clip, and the two squeezed surfaces of the square hole have 1-5° The inclination angle of the clip is installed in the square hole, the inclination angle of the outside of the clip is 1.1-6°, and the inclination angle of the clip is 0.1-1° larger than that of the anchor plate. 2. The anchorage for tensioning the carbon fiber plate according to claim 1, wherein the inclination angle of the anchor plate is 1.5-2.5°. 3. The anchor for carbon fiber plate tensioning according to claim 1 or 2, characterized in that the inclination angle of the clip is 0.2-0.3° larger than that of the anchor plate.

Images