CN110672511A - Fiber cloth-concrete interface bonding strength detection device and detection method - Google Patents

Abstract

The invention discloses a fiber cloth-concrete interface bond strength detection device and a detection method. The detection device comprises a pipe body and a tubular cutter sleeved in the pipe body. The tubular cutter has a degree of freedom of clockwise or counterclockwise rotation , the cutting end of the tubular cutter is flush with the bottom opening of the tube body, the top opening of the tube body is provided with a force application device, and the force application end of the force application device is detachably connected with an anchor, which is located in the inner cavity of the tube body and is connected with the bottom of the tube body. The openings are flush; the detection method includes the following steps: install the detection device, alternately move the handle clockwise and counterclockwise in the arc-shaped notch, and cut the fiber cloth to be tested on the fiber cloth by the tubular cutter; finally, the force application device works Test the bond strength of fiber cloth and concrete interface. The detection device of the present invention is more portable and lightweight, and the detection method is simple, fast and stable.

Description

A fiber cloth-concrete interface bond strength detection device and detection method

technical field

The invention belongs to the technical field of concrete structure detection, and in particular relates to a fiber cloth-concrete interface bond strength detection device and a detection method.

Background technique

In the field of construction and civil engineering, the use of externally pasted fiber cloth to reinforce reinforced concrete, so that the fiber cloth and concrete are jointly stressed to improve the structural performance, has been widely used in the industry. The bonding performance between the fiber cloth and the concrete interface is the key technical parameter of the reinforcement effect of the concrete structure, which directly affects the overall performance of the reinforced concrete structure. At present, the bonding strength of the interface is mainly measured by measuring the tensile strength between the fiber cloth and the concrete. However, the existing detection devices have complex structure, high cost, and it is difficult to ensure that the direction of tensile stress is perpendicular to the detection surface, resulting in detection results. Inaccurate.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a fiber cloth-concrete interface bond strength detection device, which includes a pipe body and a tubular cutter sleeved in the pipe body. The cutting end of the knife is flush with the bottom opening of the tube body, the top opening of the tube body is provided with a force applying device, the force applying end of the force applying device is detachably connected with an anchor, and the anchor is located in the inner cavity of the tube body and is flush with the bottom opening of the tube body together.

As a further description of the above technical solution:

The top of the side wall of the tubular cutter is symmetrically provided with a pair of handles, the handles are horizontally arranged, the side wall of the tube body is provided with a pair of arc-shaped notches corresponding to the handles, and the handles pass through the arc-shaped notches and have along the arc-shaped notches. degrees of freedom of horizontal movement.

As a further description of the above technical solution:

The tubular cutter can be moved upward to retract its cutting end into the tubular lumen.

As a further description of the above technical solution:

The side wall of the pipe body is also provided with a pair of L-shaped engaging openings, the L-shaped engaging openings are correspondingly located above the arc-shaped notch, the horizontal section of the L-shaped engaging opening is parallel to the arc-shaped notch, and the vertical section of the L-shaped engaging opening is connected to Curved notch, the handle can be moved between the L-shaped snap-fit and the curved notch.

As a further description of the above technical solutions:

Both the anchor and the force application device are located on the central axis of the pipe body.

As a further description of the above technical solutions:

The force application device is connected with a force application rod, the force application rod extends along the length direction of the pipe body, and the force application rod is detachably connected with the anchor.

The main functions of the components of the detection device of the present invention are as follows: (1) An anchor is set for positioning on the surface to be detected, that is, the anchor is first installed and then connected to the rest of the device, and the anchor is used to determine the pipe body and the to-be-detected surface. The central axis of the detection surface makes the central axis of the pipe body, the force applying device, the tubular cutter, the anchor and the surface to be detected the same; (2), set the tubular cutter to cut the circular shape to be detected on the detection surface It avoids the respective drawbacks brought by the square surface to be detected in the prior art. The tubular cutter only needs to rotate slightly alternately clockwise and counterclockwise to complete the cutting. The cutting state is stable and the operation is simple. The tubular cutter can also be moved upward. The cutting end is retracted to the inner cavity of the tube, which protects the blade and at the same time improves the safety factor to prevent the tubular cutter from accidentally injuring the operator when not in use.

Another object of the present invention is to provide a detection method for a fiber cloth-concrete interface bond strength detection device. First, the anchors are bonded to the fiber cloth, and the force-applying rods are connected to the anchors. Connect the anchor with the rest of the detection device; then, alternately move the handle clockwise and counterclockwise in the arc-shaped notch, the handle drives the tubular cutter to rotate, and the tubular cutter cuts the fiber cloth to be tested on the fiber cloth; Finally, the force-applying device works to detect the bond strength of the interface between the fiber cloth and the concrete.

The detection method of the invention can directly detect the bonding strength of the interface between the fiber cloth and the concrete on the spot. During the detection, the force application rod is kept perpendicular to the detection surface, the detection area is completely independent from the surrounding fiber cloth, the stability is higher, and the result is more accurate and reliable. .

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the three-dimensional structure schematic diagram of the fiber cloth-concrete interface bond strength detection device in Example 1;

Fig. 2 is the enlarged schematic diagram of the arc-shaped gap in Fig. 1;

Fig. 3 is the three-dimensional structure schematic diagram of the tubular cutter among the embodiment 1;

Fig. 4 is the perspective view when the pipe body and the force applying device are connected in the embodiment 1;

5 is a longitudinal sectional view of a fiber cloth-concrete interface bond strength detection device in Example 1;

6 is a schematic diagram of the working state of the fiber cloth-concrete interface bond strength detection device in Example 1;

Fig. 7 is the connection schematic diagram of the force applying rod, the force applying device and the annular connecting piece in embodiment 2;

Fig. 8 is the three-dimensional structure schematic diagram of the anchor in embodiment 2;

Marked in the figure: 1. Pipe body; 11. Arc-shaped notch; 12. L-shaped snap-in mouth; 2. Force-applying device; 21. Force-applying rod; ; 222, snap groove; 3, tubular cutter; 31, handle; 4, annular connector; 5, fiber cloth; 6, concrete beam structure.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. These examples are only intended to illustrate the present invention and not to limit the scope of the present invention. The structural features of the present invention will now be described in detail with reference to the accompanying drawings.

Example 1

Referring to FIG. 1 , a fiber cloth-concrete interface bond strength detection device is provided in this embodiment. The main components include a pipe body 1 , a force applying device 2 and a tubular cutter 3 , and the force applying device 2 is closed and connected by an annular connecting piece 4 The top of the tube body 1 is opened, the tubular cutter 3 is sleeved in the tube body 1, the force applying device 2 is located above the tubular cutter 3, and the axis lines of the tube body 1, the force applying device 2 and the tubular cutter 3 are the same, Referring to FIG. 3 , the inner cavity of the tubular body 1 and the inner cavity of the tubular cutter 3 form a force applying space of the force applying device 2 .

Referring to FIG. 1, the tubular cutter 3 has a degree of freedom to rotate clockwise or counterclockwise. In addition, the tubular cutter 3 can be moved upward to make its cutting end retract to the inner cavity of the tubular body 1, or it can be moved downward to the same extent as the cutting end. The bottom opening of the tube body 1 is flush with each other. An anchor member 22 is detachably connected to the force application end of the force application device 2 , and the anchor member 22 is located in the inner cavity of the tube body 1 and is flush with the bottom opening of the tube body 1 .

In the device of this embodiment, the main functions of its various components are as follows:

(1) Set the anchor 22 for positioning on the surface to be detected, that is, first install the anchor 22 and then connect the rest of the device, and use the anchor 22 to determine the central axis of the pipe body 1 and the surface to be detected, so that the pipe body 1 , the force application device 2, the tubular cutter 3, the anchor 22 and the central axis of the surface to be detected are the same;

(2) The tubular cutter 3 is arranged to cut the circular surface to be detected on the detection surface, avoiding the respective drawbacks brought by the square surface to be detected in the prior art. The tubular cutter 3 only needs to be clockwise and counterclockwise. The hour hand rotates slightly alternately to complete the cutting. The cutting state is stable and the operation is simple. The tubular cutter 3 can also be moved upward so that the cutting end can be retracted to the inner cavity of the tube body 1. While protecting the blade, it can also improve the safety factor and prevent tubular cutting. Cutter 3 accidentally hurts the operator when not in use;

The detection device of this embodiment can be used to detect the bond strength between the fiber cloth 5 and the concrete beam structure 6. Compared with the existing detection device, it is more portable and lightweight, and can directly detect the bond strength on site; The rod is kept perpendicular to the detection surface, the detection area is completely independent from the surrounding fiber cloth, and the detection results are more accurate and reliable. The force applying device 2 in this embodiment may preferably be a digital display hydraulic jack, and the digital display hydraulic jack is equipped with a digital display (not shown in the accompanying drawings).

Referring to FIG. 2, the output end of the force applying device 2 is connected with a force applying rod 21, the force applying rod 21 extends along the length direction of the force applying space, and the end of the force applying rod 21 is connected with an anchor member 22, and the force applying rod 21 and the anchor member 22 are Detachable connection. The anchor 22 is located in the inner cavity of the tube body 1 and is flush with the bottom opening of the tube body 1 .

1, 2 and 3, the connection mode of the tubular cutter 3 and the tube body 1 is specifically: a pair of handles 31 are symmetrically arranged at the top of the side wall of the tubular cutter 3, the handles 31 are arranged horizontally, and the side wall of the tube body 1 is symmetrically provided with a pair of handles 31. A pair of arc-shaped notches 11 corresponding to the handle 31 are opened. The handle 31 passes through the arc-shaped notches 11 and has a degree of freedom to move horizontally along the arc-shaped notches 11. In this embodiment, the movable angle is 30° Within degrees, at this time, the cutting edge of the tubular cutter 3 is flush with the end of the tubular body 1 away from the force applying device 2, and the tubular cutter 3 is in a working state and can be cut.

Referring to FIG. 2 , a pair of L-shaped snap openings 12 are also opened on the side wall of the pipe body 1 . The L-shaped snap openings 12 are correspondingly located above the arc-shaped gaps 11 , and the horizontal section of the L-shaped snap-fit openings 12 is parallel to the arc-shaped gaps 11 . The vertical section of the L-shaped snap-in mouth 12 is connected to the arc-shaped gap 11. After the tubular cutter 3 is cut, the handle 31 is pulled upward so that it passes through the vertical section of the L-shaped snap-in mouth 12 and enters the L-shaped gap from the arc-shaped gap 11. In the horizontal section of the engaging opening 12 , at this time, the cutting edge of the tubular cutter 3 rises upward and contracts back into the tubular body 1 .

Example 2

Referring to FIG. 8 , on the basis of Embodiment 1, the difference of this embodiment lies in the detachable connection method of the force applying rod 21 and the anchor 22 , which is as follows: the end of the outer wall of the force applying rod 21 extends outward with four clips. The connecting block 211, the connecting line of the engaging block 211 can form a cross structure, the top of the inner wall of the anchor 22 is embedded with a sliding groove 221 suitable for the engaging block 211, and the inner wall of the anchor 22 is also embedded with a ring-shaped engaging groove. 222, the bottom end of the sliding groove 221 extends to the engaging groove 222, and the diameter of the engaging groove 222 is larger than the diameter of the circumscribed circle of the aforementioned cross structure.

Therefore, in this embodiment, the connecting method of the force applying rod 21 and the anchor 22 is as follows: the engaging block 211 slides into the chute 221 until it reaches the engaging groove 222, and then rotates the force applying lever 21 so that the The engaging block 211 and the sliding groove 221 on the anchor 22 are out of position, so that the force applying rod 21 and the anchor 22 are connected together.

Example 3

Referring to FIG. 6 and FIG. 7 , on the basis of Embodiment 1 or Embodiment 2, a detection method of a fiber cloth-concrete interface bond strength detection device is provided in this embodiment, including the following operation steps:

Step (1), install the detection device on the fiber cloth 5

The anchor 22 is bonded to the fiber cloth 5, the force applying rod 21 and the anchor 22 are connected, and the anchor 22 is integrally connected with the detection device through the force applying rod 21. At this time, the pipe body 1 extends to the surface of the fiber cloth 5. , the tube body 1 plays a role of overall fixing, and at the same time, it can keep the whole body perpendicular to the detection surface;

Step (2), cut out the part to be tested on the fiber cloth 5

Move the handle 31 from the L-shaped snap-in port 12 to the arc-shaped gap 11, the cutting end of the tubular cutter 3 is flush with the end of the tube body 1 and the bottom end of the anchor 22, and clockwise along the arc-shaped gap 11 Alternately move the handle 31 counterclockwise, so that the tubular cutter 3 rotates and cuts out a circular fiber cloth to be detected on the fiber cloth 5, and the center of the fiber cloth to be detected is located on the central axis of the tube body 1;

In step (3), the force applying device 2 works to detect the bond strength of the interface between the fiber cloth and the concrete, and record the data.

Claims (7)

1. The utility model provides a fibre cloth-concrete interface bonding strength detection device, a serial communication port, including body (1) and tubulose cutter (3) of cup jointing in body (1), tubulose cutter (3) have clockwise or anticlockwise rotation's degree of freedom, the cutting end and body (1) bottom opening looks parallel and level of tubulose cutter (3), be equipped with force application device (2) on body (1) open-top, force application device (2) application of force end detachably are connected with anchor assembly (22), anchor assembly (22) are located body (1) inner chamber and are parallel and level with body (1) bottom opening looks parallel and level.

2. The fiber cloth-concrete interface bonding strength detection device according to claim 1, characterized in that: the tubular cutter (3) is characterized in that a pair of handles (31) is symmetrically arranged at the top end of the side wall of the tubular cutter (3), the handles (31) are horizontally arranged, a pair of arc-shaped notches (11) corresponding to the handles (31) are formed in the side wall of the pipe body (1), and the handles (31) penetrate through the arc-shaped notches (11) and have the freedom degree of horizontal movement along the arc-shaped notches (11).

3. The fiber cloth-concrete interface bonding strength detection device according to claim 2, characterized in that: the tubular cutter (3) can move upwards to enable the cutting end to be retracted into the inner cavity of the tube body (1).

4. The fiber cloth-concrete interface bonding strength detection device according to claim 3, characterized in that: still seted up a pair of L type block mouth (12) on body (1) lateral wall, L type block mouth (12) are corresponding to be located arc breach (11) top, and the horizontal segment of L type block mouth (12) parallels with arc breach (11), and the vertical section of L type block mouth (12) communicates to arc breach (11), and handle (31) can move between L type block mouth (12) and arc breach (11).

5. The fiber cloth-concrete interface bonding strength detection device according to claim 1, characterized in that: the anchoring piece (22) and the force application device (2) are both positioned on the central axis of the pipe body (1).

6. The fiber cloth-concrete interface bonding strength detection device according to claim 1, characterized in that: the force application device (2) is connected with a force application rod (21), the force application rod (21) extends along the length direction of the pipe body (1), and the force application rod (21) is detachably connected with the anchoring piece (22).

7. The method for detecting the bonding strength of the fiber cloth-concrete interface according to any one of claims 1 ~ 6 is characterized by comprising the steps of firstly bonding the anchoring piece (22) on the fiber cloth (5), connecting the force application rod (21) with the anchoring piece (22), connecting the anchoring piece (22) with the rest part of the detection device through the force application rod (21), then, moving the handle (31) in the arc-shaped notch (11) in a clockwise and anticlockwise alternating mode, driving the tubular cutter (3) to rotate by the handle (31), cutting the fiber cloth to be detected on the fiber cloth (5) by the tubular cutter (3), and finally, working the force application device (2) to detect the bonding strength of the fiber cloth and the concrete interface.

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