Anchoring part shear test device

Abstract

The utility model relates to the field of shear tests, in particular to an anchoring part shear test device which comprises a force application mechanism, a force application support, a force application rope and a steering mechanism, the force application mechanism and the force application rope are respectively installed on the force application support, and the steering mechanism comprises a pulley. One end of the force application rope is connected with the anchoring part, and the other end bypasses the pulley and is connected with the force application mechanism; the force application rope comprises a first force application rope section connected with the anchoring part and the pulley and a second force application rope section connected with the pulley and the force application mechanism, and the first force application rope section and the second force application rope section are not located on the same straight line; the pulley is movably connected with the force application support so that the axis of the first force application rope section can be perpendicular to the axis of the anchoring part. The device is simple and reliable in structure, easy and convenient to install and wide in application range.

Description

Technical Field

[0001] This utility model relates to the field of shear testing, and in particular to a shear testing device for anchors. Background Technology

[0002] Anchors are divided into pre-embedded anchors and post-installed anchors. Pre-embedded anchors are typically pre-installed steel bars and anchor bolts in the structure, used for fixing structural or non-structural components. Post-installed anchors are anchoring components installed by drilling holes in hardened concrete according to specified procedures. In concrete anchoring projects, to determine the pull-out and shear resistance of anchors under ultimate limit state and serviceability limit state, on-site sampling tests of the pull-out and shear resistance of concrete anchors must be conducted. The shear test refers to a test in which a load is applied perpendicular to the anchor axis.

[0003] Current shear testing methods involve placing a reaction device on the side of the substrate, such as concrete, with the loading direction perpendicular to the anchor axis. Since the surfaces of the anchor and the reaction device are not on the same plane (generally perpendicular), and the line of action of the force during loading is along the substrate surface where the anchor is located, the reaction device cannot guarantee force balance. Therefore, additional clamping and fixing devices are needed to ensure the stability of the reaction device and provide effective support for the test. This structure has three drawbacks: First, it is complex, requiring not only a reaction frame but also additional clamping and fixing devices to ensure the stability of the reaction device, resulting in cumbersome installation, low testing efficiency, and high cost. Second, its applicability is limited. Because the reaction device and anchor are placed on different substrate surfaces, this method is not suitable for large substrates or substrates where the reaction device cannot be installed. Finally, due to the different sizes of the anchors, shear plates of varying thicknesses are required. To ensure a more secure connection between the wire rope and the shear plate and to better apply shear force, the connection height between the wire rope and the shear plate will vary accordingly. Meanwhile, to ensure the loading direction remains perpendicular to the anchor axis (i.e., the wire rope is always perpendicular to the anchor axis), the reaction frame and clamping devices need to be adjusted accordingly. This undoubtedly increases the difficulty of testing, and may even prevent testing altogether due to unfavorable installation conditions. Therefore, existing anchor shear testing equipment is not suitable for testing anchors of different sizes, resulting in a narrow application range, reduced testing efficiency, and high costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an anchor shear test device that is simple in structure, reliable, easy to install, and has a wide range of applications.

[0005] To solve the above-mentioned technical problems, this utility model provides an anchor shear test device, including a force application mechanism, a force application support, a force application rope, and a steering mechanism. The force application mechanism and the force application rope are respectively installed on the force application support, and the steering mechanism includes a pulley.

[0006] One end of the force-applying rope is connected to the anchor, and the other end passes around the pulley and is connected to the force-applying mechanism; the force-applying rope includes a first force-applying rope segment connecting the anchor and the pulley, and a second force-applying rope segment connecting the pulley and the force-applying mechanism, wherein the first force-applying rope segment and the second force-applying rope segment are not on the same straight line;

[0007] The pulley and the force-applying bracket are movably connected so that the axes of the first force-applying rope segment and the anchor are perpendicular to each other.

[0008] As an improvement to the above solution, the force-applying bracket includes a support plate and a support plate, the support plate is disposed on the top of the support plate and fixedly connected to the support plate, and the force-applying mechanism is installed on the support plate;

[0009] The pulley and the support plate are movably connected to adjust the height of the pulley.

[0010] As an improvement to the above solution, the support plate is provided with an adjustment hole, and the pulley can move along the adjustment hole.

[0011] As an improvement to the above solution, the direction of the resultant force on the pulley is perpendicular to the extension direction of the adjusting hole.

[0012] As an improvement to the above scheme, the axes of the second force-applying rope segment and the anchor are parallel to each other;

[0013] The force-applying mechanism and the support plate are movably connected.

[0014] As an improvement to the above solution, the steering mechanism further includes a connecting component, which includes a rotating shaft that passes through a pulley and an adjusting hole, so that the pulley is mounted on a support plate; the rotating shaft and the pulley are rotatably connected.

[0015] As an improvement to the above solution, a shearing plate is also included, which is sleeved outside the anchor, and the force-applying rope is connected to the anchor through the shearing plate.

[0016] The plane containing the shear plate is perpendicular to the axis of the anchor.

[0017] As an improvement to the above solution, a force measuring mechanism for detecting the magnitude of shear force is also included;

[0018] The first force-applying rope segment includes a first small segment and a second small segment. The shearing plate and the force-measuring mechanism are connected through the first small segment, and the force-measuring mechanism and the pulley are connected through the second small segment.

[0019] As an improvement to the above solution, the force-applying rope is connected to the middle part of the shear plate in the thickness direction.

[0020] As an improvement to the above solution, the force-applying mechanism is a through-hole jack.

[0021] The present invention has the following beneficial effects:

[0022] This utility model's anchor shear resistance testing device is equipped with a steering mechanism. A pulley redirects the force applied by the force-applying mechanism from the shear force perpendicular to the anchor axis. After the pulley's redirection, the tensile force and shear force generated by the force-applying mechanism are not in the same direction; that is, the first and second force-applying rope segments are not on the same straight line. This allows the force-applying mechanism to be installed on the substrate surface where the anchor is located, without being limited by the substrate size, and without requiring additional clamping or fixing devices. The device is simple, reliable, easy to install, highly efficient, low-cost, and widely applicable. Furthermore, the pulley design significantly reduces the friction between the pulley and the force-applying rope, improving the accuracy of the test data.

[0023] Furthermore, to accommodate anchors of different sizes and ensure that the axes of the first force-applying rope segment and the anchor are perpendicular to each other, thus guaranteeing the accuracy of the test data, this invention defines a movable connection between the pulley and the force-applying bracket. This allows the position of the pulley on the force-applying bracket to be adjusted to accommodate anchors of different sizes, thus having a wide range of applications. Attached Figure Description

[0024] Figure 1 This is a diagram showing the usage status of the anchor shear resistance testing device of this utility model;

[0025] Figure 2 yes Figure 1 Enlarged view of the steering mechanism section;

[0026] Figure 3 yes Figure 1 Top view;

[0027] Figure 4 yes Figure 1 A schematic diagram of the connection structure of the force-applying mechanism, the force-applying frame, and the steering mechanism. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0029] See Figure 1-4This utility model discloses an anchor shear resistance testing device for detecting the shear resistance of anchors 100 on a base 200. It includes a force application mechanism 1, a force application support 2, a force application rope 3, and a steering mechanism. The force application support 2 is fixedly installed on the base 200. The force application mechanism 1 and the force application rope 3 are respectively installed on the force application support 2. The steering mechanism includes a pulley 4.

[0030] One end of the force-applying rope 3 is connected to the anchor 100, and the other end passes around the pulley 4 and is connected to the force-applying mechanism 1. The force-applying rope 3 includes a first force-applying rope segment 31 connecting the anchor 100 and the pulley 4, and a second force-applying rope segment 32 connecting the pulley 4 and the force-applying mechanism 1. The first force-applying rope segment 31 and the second force-applying rope segment 32 are not on the same straight line.

[0031] The pulley 4 and the force-applying bracket 2 are movably connected so that the axes of the first force-applying rope segment 31 and the anchor 100 are perpendicular to each other. Specifically, the axes of the first force-applying rope segment 31 and the anchor 100 are connected perpendicularly to each other.

[0032] This utility model's anchor shear resistance testing device is equipped with a steering mechanism. A pulley redirects the force applied by the force-applying mechanism from the shear force perpendicular to the anchor axis. After the pulley's redirection, the tensile force and shear force generated by the force-applying mechanism are not in the same direction; that is, the first and second force-applying rope segments are not on the same straight line. This allows the force-applying mechanism to be installed on the substrate surface where the anchor is located, without being limited by the substrate size, and without requiring additional clamping or fixing devices. The device is simple, reliable, easy to install, highly efficient, low-cost, and widely applicable. Furthermore, the pulley design significantly reduces the friction between the pulley and the force-applying rope, improving the accuracy of the test data.

[0033] Furthermore, to accommodate anchors of different sizes and ensure that the axes of the first force-applying rope segment and the anchor are perpendicular to each other, thus guaranteeing the accuracy of the test data, this invention defines a movable connection between the pulley and the force-applying bracket. This allows the position of the pulley on the force-applying bracket to be adjusted to accommodate anchors of different sizes, thus having a wide range of applications.

[0034] Preferably, the force-applying mechanism 1 is a through-hole jack. The force-applying rope 3 is a steel wire rope.

[0035] It should be noted that the steering mechanism and the force-applying mechanism 1 are mounted on the base 200 via the force-applying bracket 2, and the base 200 is made of concrete. Anchors 100 are installed by drilling holes in the base 200; part of the anchor 100 is embedded inside the base 200, and the other part is exposed outside the base 200, such as... Figure 1As shown. This utility model can be installed on the same base 200 surface as the anchor 100 via a steering mechanism, meaning that the utility model and the anchor are on the same base surface, eliminating the need for installation on different base surfaces. Moreover, the installation is stable and reliable, requiring no other auxiliary fixing devices. It has a simple and reliable structure, is easy to install, has high testing efficiency, and is not limited by the size of the base, making it widely applicable.

[0036] Furthermore, such as Figure 1 , 3 As shown, this utility model also includes a shearing plate 5, which is sleeved on the outside of the anchor 100. The force-applying rope 3 is connected to the anchor 100 through the shearing plate 5. The plane of the shearing plate 5 is perpendicular to the axis of the anchor 100. This utility model utilizes the shearing plate to apply a shearing force perpendicular to the axis of the anchor. Different sizes of anchors require different sized shearing plates for use. Typically, shearing plates of different thicknesses are used in conjunction with the anchors.

[0037] To ensure the shear plate is under balanced force and to better transmit shear force, preferably, the force-applying rope 3 is connected to the middle part of the shear plate 5 in the thickness direction.

[0038] Specifically, such as Figure 4 As shown, the force-applying bracket 2 includes a support plate 21 and a support plate 22. The support plate 22 is located on top of the support plate 21 and is fixedly connected to the support plate 21. The force-applying mechanism 1 is installed on the support plate 22. That is, the force-applying mechanism 1 is located above the pulley 4. More specifically, there are two support plates 21, respectively located on opposite sides of the support plate 22. The support plates 21 and the support plates 22 are perpendicularly connected to each other, ensuring the reliability and stability of the force-applying bracket, increasing the strength of the force-applying bracket, and thus ensuring the stable and reliable installation of the steering mechanism and the force-applying mechanism. For example, Figure 1 , 3 As shown, the support plate 21 is fixedly installed on the base by fasteners 23.

[0039] The pulley 4 and the support plate 21 are movably connected to adjust the height of the pulley 4. Since different anchor sizes (such as diameters) require shear plates of varying thicknesses, the height of the connection between the force-applying rope and the shear plate will also differ. To ensure that the first force-applying rope segment is always perpendicular to the anchor's axis, the pulley height also needs to be adjusted accordingly. Therefore, by setting a movable connection between the pulley and the support plate to adjust the pulley height, this invention can be applied to the inspection of anchors of different sizes, thus having a wide range of applications.

[0040] Furthermore, such as Figure 2As shown, the support plate 21 is provided with an adjustment hole 211, and the pulley 4 can move along the adjustment hole 211, thereby changing the position of the pulley on the force-applying bracket to adapt to the height change at the connection between the force-applying rope and the shear plate. The adjustment hole 211 is an oblong hole.

[0041] Meanwhile, to ensure the tanker is under balanced force and to prevent the pulley from shifting under load, this invention specifies that the direction of the resultant force on the pulley 4 is perpendicular to the extension direction of the adjusting hole 211. The resultant force generated by the pulley under the combined action of the first and second force-applying rope segments acts on the support plate. If the direction of the resultant force is within the adjusting hole, the pulley will move within the adjusting hole, preventing normal testing. To prevent the pulley from shifting easily, the direction of the resultant force is towards the support plate, rather than towards the adjusting hole, making the pulley more stable and preventing it from shifting within the adjusting hole during the test. Specifically, the direction of the resultant force on the pulley 4 is perpendicular to the inner wall of the adjusting hole 211.

[0042] Figure 2 The arrows in the diagram indicate the direction of the force. F1 represents the force on the first rope segment, F2 represents the force on the second rope segment, and F3 is the resultant force of F1 and F2, which is the resultant force on pulley 4.

[0043] Preferably, the axes of the second force-applying rope segment 32 and the anchor 100 are parallel to each other, that is, the first spiral force-applying rope segment 31 and the second force-applying rope segment 32 are perpendicular to each other. The parallelism between the axes of the second force-applying rope segment and the anchor 100 facilitates the installation of the force-applying mechanism. In this case, to balance the force on the pulley, the angle between the first spiral force-applying rope segment and the extension direction of the adjusting hole is designed to be 45 degrees, meaning the direction of the resultant force on the pulley is perpendicular to the extension direction of the adjusting hole. In other words, the pulley transforms the shear force perpendicular to the anchor axis into a tensile force parallel to the anchor axis, allowing the force-applying mechanism to be installed on the base surface where the anchor is located, without being limited by the base size, and without requiring additional clamping or fixing devices. The structure is simple, reliable, easy to install, has high testing efficiency, low cost, and a wide range of applications.

[0044] To facilitate the adjustment of the pulley height and ensure the parallelism of the axes of the second force-applying rope segment and the anchor, the force-applying mechanism 1 is preferably movably connected to the support plate 22, allowing the specific position of the force-applying mechanism on the support plate to be changed. When the pulley changes its position on the force-applying support, the force-applying mechanism must also correspondingly change its position on the force-applying support to ensure the parallelism of the axes of the second force-applying rope segment and the anchor. Therefore, appropriate position adjustments are required based on specific experiments.

[0045] Preferably, such as Figure 2 , 4As shown, the steering mechanism further includes a connecting assembly, which includes a rotating shaft 6. The rotating shaft 6 passes through the pulley 4 and the adjusting hole 211, respectively, so that the pulley 4 is mounted on the support plate 21; the rotating shaft 6 and the pulley 4 are rotatably connected. The pulley can rotate around the rotating shaft, reducing the friction between the force rope and the pulley.

[0046] More preferably, the connecting assembly further includes a locking member 7, through which the rotating shaft 6 is fixed to the support plate 21. The locking member 7 can be a nut, and the rotating shaft 6 and the locking member 7 are threaded together. When the rotating shaft is adjusted to the correct position within the adjusting hole, the locking member is tightened to make it abut against the support plate, thus fixing the rotating shaft to the support plate. It should be noted that the adjusting holes on the two support plates are symmetrically arranged, with both ends of the rotating shaft passing through the two adjusting holes respectively, and both ends of the rotating shaft being fixed to the two support plates by the locking members.

[0047] Preferably, such as Figure 1 , 3 As shown, this utility model also includes a force measuring mechanism 8 for detecting the magnitude of shear force. The force measuring mechanism 8 can be a standard force measuring instrument.

[0048] like Figure 3 As shown, the first force-applying rope segment 31 includes a first small segment 311 and a second small segment 312. The shearing plate 5 and the force-measuring mechanism 8 are connected through the first small segment 311, and the force-measuring mechanism 8 and the pulley 4 are connected through the second small segment 312. That is, the force-measuring mechanism is set on the first force-applying rope segment to detect the force on the first force-applying rope segment, thereby detecting the magnitude of the shear force on the anchor and measuring the shear resistance of the anchor.

[0049] In summary, this utility model provides an anchor shear resistance testing device that is simple in structure, reliable, easy to install, and has a wide range of applications.

[0050] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A shear strength testing device for anchors, characterized in that, It includes a force-applying mechanism, a force-applying support, a force-applying rope, and a steering mechanism. The force-applying mechanism and the force-applying rope are respectively mounted on the force-applying support, and the steering mechanism includes a pulley. One end of the force-applying rope is connected to the anchor, and the other end passes around the pulley and is connected to the force-applying mechanism; the force-applying rope includes a first force-applying rope segment connecting the anchor and the pulley, and a second force-applying rope segment connecting the pulley and the force-applying mechanism, wherein the first force-applying rope segment and the second force-applying rope segment are not on the same straight line; The pulley and the force-applying bracket are movably connected so that the axes of the first force-applying rope segment and the anchor are perpendicular to each other.

2. The anchor shear test apparatus of claim 1, wherein, The force-applying bracket includes a support plate and a support plate. The support plate is located on top of the support plate and is fixedly connected to the support plate. The force-applying mechanism is installed on the support plate. The pulley and the support plate are movably connected to adjust the height of the pulley.

3. The anchor shear test apparatus of claim 2, wherein, The support plate is provided with adjustment holes, and the pulley can move along the adjustment holes.

4. The anchor shear test apparatus of claim 3, wherein, The direction of the resultant force on the pulley is perpendicular to the extension direction of the adjusting hole.

5. The anchor shear test device of any of claims 2-4, wherein, The axes of the second force-applying rope segment and the anchor are parallel to each other; The force-applying mechanism and the support plate are movably connected.

6. The anchor shear test apparatus of claim 3, wherein, The steering mechanism further includes a connecting component, which includes a rotating shaft that passes through a pulley and an adjusting hole, so that the pulley is mounted on a support plate; the rotating shaft and the pulley are rotatably connected.

7. The anchor shear test apparatus of claim 1, wherein, It also includes a shear plate, which is sleeved on the outside of the anchor, and the force rope is connected to the anchor through the shear plate; The plane containing the shear plate is perpendicular to the axis of the anchor.

8. The anchor shear test apparatus of claim 7, wherein, It also includes a force-measuring mechanism for detecting the magnitude of shear force; The first force-applying rope segment includes a first small segment and a second small segment. The shearing plate and the force-measuring mechanism are connected through the first small segment, and the force-measuring mechanism and the pulley are connected through the second small segment.

9. The anchor shear test apparatus of claim 7, wherein, The force-applying rope is connected to the middle part of the shear plate in the thickness direction.

10. The anchor shear test apparatus of claim 1, wherein, The force-applying mechanism is a through-hole jack.

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