Metal type FRP rib anchoring end

Abstract

The utility model relates to the technical field of building structure reinforcement, in particular to a metal type FRP (fiber reinforced plastic) rib anchoring end which comprises an end body and a sleeve, a wedge sheet is clamped in the sleeve, the end body is sleeved in the sleeve, the end body is clamped with the wedge sheet, and the wedge sheet is sleeved in the sleeve. Internal threads are evenly formed in the wedge piece in the axis direction of the wedge piece, the outer surface of the end head body is in threaded connection with the outer surfaces of the internal threads, a circular truncated cone hole is formed in the sleeve, and the outer surface of the wedge piece is in a circular truncated cone shape. Soft metal has flexibility and plasticity, the FRP rib can be prevented from being extruded and damaged, self-locking of the FRP rib and the sleeve can be achieved by inserting the wedge piece, friction force can be increased through the internal threads, the FRP rib is not prone to sliding, the pulling resistance of the whole device is increased through the shear keys, the anchoring part is the high-strength stainless steel sleeve, and the anchoring part is not prone to deformation. And the effects of enough anchoring force and anti-seismic performance can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of building structure reinforcement, in particular to a metal type FRP bar anchoring end. Background Technique

[0002] In the building structure reinforcement project, as a new type of reinforcement material, FRP bars have the advantages of light weight, high strength, corrosion resistance, etc., and are widely used in the reinforcement projects of structures such as bridges, tunnels, and buildings. During the reinforcement process, the treatment of the anchoring end of the FRP bar is one of the key technologies, which directly affects the reinforcement effect and structural safety. The traditional treatment methods for the anchoring end of the FRP bar have problems such as insufficient anchoring force, easy aging, and easy corrosion, and it is difficult to meet the actual engineering requirements. Content of the Utility Model

[0003] In order to improve the reinforcement effect and structural safety of the FRP bar, the utility model provides a metal type FRP bar anchoring end.

[0004] The metal type FRP bar anchoring end provided by the utility model adopts the following technical scheme:

[0005] A metal type FRP bar anchoring end includes an end body and a sleeve. A wedge piece is clamped inside the sleeve. The end body is sleeved inside the sleeve, and the end body is clamped with the wedge piece.

[0006] By adopting the above technical scheme, the end body of the FRP bar is anchored in the concrete through the cooperation of the sleeve and the wedge piece.

[0007] Preferably, internal threads are uniformly arranged along the axial direction inside the wedge piece, and the outer surface of the end body is threadedly connected to the outer surface of the internal threads.

[0008] By adopting the above technical scheme, the internal threads can increase the friction force and better wrap the end body of the FRP bar.

[0009] Preferably, a conical hole is arranged inside the sleeve, and the outer surface of the wedge piece is conical.

[0010] Preferably, both the top and the bottom of the conical hole are smaller than the top and the bottom of the wedge piece.

[0011] By adopting the above technical scheme, the sleeve is large outside and small inside, and the conical hole is smaller than the wedge piece to ensure that it can be tensioned and fixed through the friction force after the wedge piece is inserted.

[0012] Preferably, the wedge piece includes three segments, and wedge grooves are arranged on the outer surface of each segment.

[0013] By adopting the above technical solution, through the wedge grooves on the wedge piece, it is convenient to install and fix the three split pieces.

[0014] Preferably, one end of the sleeve is fixedly connected with a shear key.

[0015] By adopting the above technical solution, the lateral stiffness of one end of the sleeve is increased through the shear key, preventing the sleeve from being pulled out in the concrete and avoiding deformation and warping of the sleeve in the concrete.

[0016] Preferably, the sleeve is made of stainless steel and the wedge piece is made of soft metal.

[0017] By adopting the above technical solution, stainless steel has good corrosion resistance and high strength. The soft metal can prevent the end body from being extruded and damaged. By inserting the wedge piece, the end body and the sleeve can be self-locked.

[0018] Preferably, an end hole groove is formed in the sleeve, and three serrated guide rails are arranged in the end hole groove along the axial direction. The wedge piece is clamped on the outer surface of the three serrated guide rails.

[0019] By adopting the above technical solution, a layer of soft metal wedge piece is arranged in the sleeve hole groove. The FRP bar is extruded into the soft metal wedge piece. Through the friction support between the soft metal wedge piece and the three serrated guide rails, the sleeve self-locks the FRP bar.

[0020] In summary, the utility model has the following beneficial technical effects:

[0021] 1. The device is provided with a wedge piece. The soft metal has flexibility and plasticity, which can prevent the FRP bar from being extruded and damaged. By inserting the wedge piece, the FRP bar and the sleeve can be self-locked. The internal thread can also increase the friction force, making the FRP bar not easy to slide. The shear key also increases the anti-pulling force of the whole device. The anchor is made of high-strength stainless steel sleeve, which can provide sufficient anchoring force and seismic performance, and is beneficial to improving the reinforcement effect of the FRP bar and the structural safety;

[0022] 2. The sleeve of the device is provided with a tapered hole, and the wedge piece is provided with split pieces and wedge grooves. The overall sleeve is large outside and small inside, and the tapered hole is smaller than the wedge piece to ensure that it can be tensioned and fixed through friction after the wedge piece is inserted. Through the wedge grooves on the wedge piece, it is convenient to install and fix the three split pieces. The structure of the three split pieces is simple and convenient for batch processing. When the surface of one of the split pieces is damaged, it can be replaced with other split pieces, saving materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural explosion diagram of a metal-type FRP bar anchoring end of the utility model;

[0024] Figure 2It is a schematic structural diagram of a metal - type FRP bar anchoring end of the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the anchoring of a metal - type FRP bar anchoring end in concrete of the present utility model;

[0026] Figure 4 It is a schematic structural diagram of the sleeve in a metal - type FRP bar anchoring end of the present utility model;

[0027] Figure 5 It is a schematic structural diagram of the wedge piece in a metal - type FRP bar anchoring end of the present utility model.

[0028] Explanation of reference numerals: 1, end - head main body; 2, sleeve; 3, wedge piece; 4, shear key; 5, wedge groove. Detailed implementation manners

[0029] The following further elaborates on the present utility model in conjunction with the attached Figures 1-5 drawings.

[0030] The embodiment of the present utility model discloses a metal - type FRP bar anchoring end.

[0031] Referring to Figure 1 、 3 , it includes an end - head main body 1 and a sleeve 2. A wedge piece 3 is clamped inside the sleeve 2. The wedge piece 3 is made of a soft metal such as metal copper or metal zinc. The sleeve 2 is made of a high - strength stainless - steel casing to enhance the anchoring force and seismic performance at the connection between the sleeve 2 and the concrete, avoid insufficient anchoring force of the FRP bar anchoring end, and improve the anti - aging and anti - corrosion capabilities of the FRP bar anchoring end. The end - head main body 1 is sleeved inside the sleeve 2 and is clamped with the wedge piece 3.

[0032] Referring to Figure 2 、 3 , internal threads are uniformly arranged along the axial direction inside the wedge piece 3, and the outer surface of the end - head main body 1 is thread - connected to the outer surface of the internal threads. The internal threads are uniformly arranged longitudinally inside the soft - metal wedge piece 3, which can increase the friction force and better wrap the FRP bar.

[0033] Referring to Figure 3 、 4 、5, a frustum - shaped hole is opened inside the sleeve 2. Cylindrical holes are machined at both ends of the sleeve 2 according to the diameter of the FRP bar. A frustum - shaped hole is opened at one end of the sleeve 2 according to the size and shape of the wedge piece 3, which is larger on the outside and smaller on the inside and slightly smaller than the size of the wedge piece 3 to ensure that after the wedge piece 3 is inserted, it can be tensioned and fixed through the friction force. The outer surface of the wedge piece 3 is frustum - shaped, and the top and bottom of the frustum - shaped hole are smaller than the top and bottom of the wedge piece 3.

[0034] Referring to Figure 3 、 5, the wedge piece 3 includes three segments, and each segment has a wedge groove 5 on its outer surface. The three segments are assembled into the integral wedge piece 3 through the wedge grooves 5, preventing significant dislocation of the internal thread of the wedge piece 3.

[0035] Referring to Figure 2 、 3 、4, a shear key 4 is fixedly connected to one end of the sleeve 2. The number of shear keys 4 can be adjusted according to the data of preventing FRP bars and concrete, and the shear key 4 prevents the entire sleeve 2 from being pulled out of the concrete.

[0036] The sleeve 2 is made of stainless steel, and the wedge piece 3 is made of soft metal, which has flexibility and plasticity. At the same time, it has a relatively light mass. Compared with the original FRP bar anchoring end, the added weight is less. The soft metal is light in texture and can be easily added to the reinforcement projects of structures such as bridges, tunnels, and buildings. It can prevent the end body 1 of the FRP bar from being squeezed and damaged, and at the same time, it is convenient to be squeezed and inserted into the conical hole of the sleeve 2. The wedge piece 3 can be tensioned and fixed through friction.

[0037] Referring to Figure 3 , a terminal hole groove is provided in the sleeve 2. Three serrated guide rails are arranged in the terminal hole groove along the axial direction. The wedge piece 3 is clamped on the outer surface of the three serrated guide rails. Three serrated guide rails are evenly arranged longitudinally in the terminal hole groove of the sleeve 2. The installation of the serrated guide rails requires the inner wall of the sleeve hole groove to be processed into concave guide grooves at 120 equal parts. A layer of soft metal wedge piece 3 is arranged in the sleeve hole. Finally, the FRP bar is fixed in the stainless steel sleeve 2 by squeezing the soft metal wedge piece 3.

[0038] The implementation principle of a metal-type FRP bar anchoring end in an embodiment of the present utility model is as follows:

[0039] 1. The segments of the wedge piece 3 are placed one by one in the conical hole of the sleeve 2. Through the wedge grooves 5 of the segments, the assembly is completed in the conical hole. The end body 1 of the FRP bar is threadedly connected to the inside of the assembled wedge piece 3. Thus, the end body 1 of the FRP bar is located inside the sleeve 2. Place the sleeve 2 in a suitable position and pour concrete;

[0040] 2. The wedge piece 3 is made of soft metal, which has flexibility and plasticity, and can prevent the end body 1 of the FRP bar from being squeezed and damaged. The FRP bar and the sleeve 2 can achieve self-locking by inserting the wedge piece 3. The internal thread can also increase the friction force, making the FRP bar not easy to slide. The shear key 4 also increases the anti-pulling force of the entire device. The sleeve 2 is made of a high-strength stainless steel sleeve, which can provide sufficient anchoring force and seismic performance.

[0041] The above are all the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A metal FRP tendon anchoring end, characterized in that: It comprises a terminal body (1) and a sleeve (2), wherein a wedge piece (3) is clamped inside the sleeve (2), the terminal body (1) is sleeved inside the sleeve (2), and the terminal body (1) and the wedge piece (3) are clamped together.

2. The metal FRP tendon anchoring terminal according to claim 1, characterized in that: The wedge (3) is evenly provided with internal threads along its axial direction; the outer surface of the end body (1) is threadedly connected to the outer surface of the internal threads; the sleeve (2) is made of stainless steel; and the wedge (3) is made of soft metal.

3. A metal FRP tendon anchoring terminal according to claim 2, characterized in that: A truncated cone hole is provided inside the sleeve (2), and the outer surface of the wedge (3) is truncated cone-shaped.

4. The metal FRP tendon anchoring terminal according to claim 3, characterized in that: The top and bottom of the truncated cone hole are both smaller than the top and bottom of the wedge (3).

5. The metal FRP tendon anchoring terminal according to claim 4, characterized in that: The wedge piece (3) comprises three segments, and a wedge groove (5) is formed on the outer surface of each segment.

6. The metal FRP tendon anchoring terminal according to claim 5, characterized in that: One end of the sleeve (2) is fixedly connected with a shear key (4).

7. The metal FRP tendon anchoring terminal according to claim 2, characterized in that: An end hole slot is provided in the sleeve (2), three sawtooth guide rails are arranged in an array along the axial direction in the end hole slot, and the wedge (3) is clamped on the outer surfaces of the three sawtooth guide rails.

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