Device for testing shearing resistance of anchoring part
By designing a test device for the shear performance of anchors, using a fixed unit to clamp the specimen and a loading unit to apply pressure, the problem of the lack of a dedicated test device in the existing technology is solved, and high-precision, low-cost testing of the shear performance of anchors is achieved.
Patent Information
- Application Number
- CN202520393851.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-07
AI Technical Summary
There is a lack of dedicated equipment for testing the shear resistance of anchors in the current technology, and the current testing methods are difficult to control in terms of accuracy and are inconvenient to operate.
An anchor shear performance testing device is provided, including a fixing unit and a loading unit. The fixing unit is connected to the clamping sections of two fixing members by fasteners to clamp the specimen and is connected to the test bench. The loading unit applies pressure along a second direction to form shear force, and the test is carried out in conjunction with a microcomputer-controlled universal testing machine.
It improves testing accuracy and ease of operation, enabling accurate measurement of the shear bearing capacity of anchors while reducing testing costs and manpower requirements.
Smart Images
Figure CN223897240U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering testing, and in particular to a device for testing the shear resistance of anchors. Background Technology
[0002] The connection nodes between ultra-high performance concrete exterior wall panels and keel or main structure are generally achieved by pre-embedding stainless steel threaded sleeves in the ultra-high performance concrete exterior wall panels, and fixing bolts and fasteners through the connectors to the stainless steel threaded sleeves, thereby connecting the ultra-high performance concrete exterior wall panels and keel or main structure.
[0003] When in use, the embedded stainless steel threaded sleeve is subjected to shear. Currently, there is no mature and reliable method to calculate the shear bearing capacity of the embedded threaded sleeve. It is necessary to determine the shear bearing capacity of the embedded threaded sleeve through testing.
[0004] Currently, there is no universal testing device for testing the shear bearing capacity of pre-embedded threaded sleeves. In some projects, when testing the shear bearing capacity of anchors, a jack is used to apply thrust to the pre-embedded sleeve or bolt for shear testing. This method has problems such as difficulty in controlling the loading accuracy and the need for manual reading and recording of displacement during the test.
[0005] Therefore, how to improve detection accuracy and reduce operational difficulty has become a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0006] The purpose of this invention is to provide a device for testing the shear performance of anchors, so as to solve the problems that there is no device specifically for testing the shear performance of anchors in the existing technology, and that the current testing methods are difficult to control in terms of accuracy and are inconvenient to operate.
[0007] To achieve the above objectives, this utility model provides a device for testing the shear resistance of anchors, comprising:
[0008] The fixing unit includes two fixing members and multiple fasteners;
[0009] The fastener has a fixed section and a clamping section arranged at an angle, the fixed section being connected to the clamping section, and the fixed section being used to connect to the test bench; the clamping sections of the two fasteners are connected by the fastener, and the distance between the two fasteners along a first direction is adjustable to clamp or release the test specimen in the first direction; wherein, during the clamping process of the fastener, the test specimen is placed on the fastener located at the bottom, so as to maintain a distance from the test bench;
[0010] And a loading unit for applying pressure along a second direction to generate shear force on the anchors on the specimen.
[0011] Optionally, the top and bottom of the clamping section are respectively provided with through holes, and the fastener includes a screw and a nut;
[0012] The screw rods are respectively inserted into the through holes on the clamping sections of the two fixing members along the first direction. The nuts are respectively threaded to the screw rods from both ends. The nuts are movable on the screw rods to adjust the distance between the two fixing members along the first direction.
[0013] The specimen is mounted on the screw located at the bottom.
[0014] Optionally, the fixed section is connected to the test bench via the fastener;
[0015] The fixed section has a U-shaped hole at one end away from the clamping section. The U-shaped hole is open along the first direction. The screw passes through the U-shaped hole and is connected to the test bench. The screw can move in the U-shaped hole along the first direction. The nut is located at the end of the screw away from the test bench.
[0016] Optionally, the fastener further includes a washer, which is sleeved on the screw and located between the nut and the clamping section or the fixing section.
[0017] Optionally, the fastener is provided with two clamping sections, which are arranged at intervals along a third direction, so that the anchor of the specimen can extend from between the two clamping sections.
[0018] Optionally, the loading unit includes a loading device and a loading head;
[0019] The loading device is used to provide pressure;
[0020] The loading head has a connecting end and a loading end that are disposed opposite to each other. The connecting end is detachably connected to the loading device. When the loading device applies pressure, the loading end contacts the anchor to transmit the pressure applied by the loading device into the shear force of the anchor.
[0021] Optionally, a loading hole is provided at the part of the loading end that contacts the anchor, and the thickness of the loading head at the loading hole is less than the thickness at other locations.
[0022] Optionally, the loading hole is open along the second direction and is U-shaped.
[0023] Optionally, the connecting end is provided with a connecting hole, which is connected to the loading device via a pin.
[0024] Optionally, the first direction, the second direction, and the third direction are perpendicular to each other.
[0025] Compared with existing methods for measuring the shear capacity of anchors, the anchor shear performance testing device provided in this application has the following advantages:
[0026] The anchor shear performance testing device provided in this application uses a fastener to connect the clamping sections of two fixing members, allowing the specimen to be erected on the fastener located at the bottom during the clamping process. This ensures that the lower edge of the specimen is suspended during the test, without affecting the shear capacity of the anchor, thus enabling accurate measurement of the anchor's shear bearing capacity. Simultaneously, the fixing members clamp the specimen through the clamping sections and connect to the test bench through the fixing sections, preventing the specimen from overturning due to additional bending moment during the application of shear force to the anchor. Furthermore, the loading unit applies pressure to the anchor along a second direction to generate shear force, which, compared to generating shear force by applying tension, reduces the connection strength requirements between the fixing section and the test bench, thereby reducing testing costs. The anchor shear performance testing device provided in this application can be used with a microcomputer-controlled universal testing machine to complete the test, offering high loading accuracy, simultaneous recording of test data, high efficiency, and reliable data.
[0027] Furthermore, a U-shaped hole is provided at the end of the fixed section away from the clamping section, and the screw can move in the U-shaped hole along the first direction, so that the fixed section and the test table can still be connected by fasteners when the thickness of the specimen is different.
[0028] Furthermore, a loading hole is provided at the part of the loading end that contacts the anchor. The thickness of the loading head at the loading hole is less than the thickness at other locations to better simulate the shear force and additional bending moment transmitted to the anchor by the connector in actual engineering. At the same time, the loading hole is open along the second direction and is U-shaped, which can not only ensure the loading progress, but also facilitate the downward loading of the loading device. Attached Figure Description
[0029] Figure 1 A schematic diagram of the structure of the anchor shear performance testing device provided in this embodiment of the utility model;
[0030] Figure 2 A side view of the specimen held by the fastener provided in an embodiment of this utility model;
[0031] Figure 3 A schematic diagram of the structure of the fastener provided in the embodiment of this utility model;
[0032] Figure 4 This is a schematic diagram of the structure of the loading head provided in an embodiment of the present utility model;
[0033] Figure 5A schematic diagram of the structure of the specimen provided in the embodiment of this utility model;
[0034] Figure 6 A flowchart illustrating the method for testing the shear resistance of anchors provided in this embodiment of the present invention.
[0035] The explanations of the reference numerals in the accompanying drawings are as follows:
[0036] 1-Fixing component; 10-Fixing section; 11-Clamping section; 100-U-shaped hole; 110-Through hole;
[0037] 2-Fastener; 20-Screw; 21-Nut; 22-Washer;
[0038] 3-Specimen; 30-Anchor;
[0039] 4-Loading head; 40-Connecting end; 41-Loading end; 400-Connecting hole; 410-Loading hole;
[0040] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation
[0041] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may emphasize different aspects and sometimes use different scales.
[0042] As used herein, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. “One end” and “the other end,” as well as “proximal end” and “distal end,” generally refer to two corresponding parts, including not only endpoints. The terms “installed,” “connected,” and “joined” should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Furthermore, as used in this specification, the phrase "one element is disposed on another element" generally only indicates that there is a connection, coupling, cooperation, or transmission relationship between the two elements, and the connection, coupling, cooperation, or transmission between the two elements can be direct or indirect through an intermediate element. It should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located arbitrarily inside, outside, above, below, or to the side of another element, unless otherwise explicitly stated. The terms "above," "below," "top," and "bottom" generally refer to relative positional relationships arranged according to the direction of gravity; the terms "vertical" or "vertical direction" generally refer to the direction of gravity, which is generally perpendicular to the ground; "horizontal" or "horizontal plane direction" generally refers to a direction parallel to the ground. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.
[0043] The purpose of this invention is to provide a device for testing the shear performance of anchors, so as to solve the problems that there is no device specifically for testing the shear performance of anchors in the existing technology, and that the current testing methods have low detection accuracy and are inconvenient to operate.
[0044] As those skilled in the art will understand, there is currently no dedicated testing device for detecting the shear strength of embedded anchors. Therefore, in some engineering projects, when testing the shear capacity of embedded anchors, a manual hydraulic loader is used to directly apply thrust to the anchors for shear testing. This method requires manual control of the loading force, and the displacement during the test needs to be manually read and recorded, making it difficult to control the test accuracy and requiring significant manpower. Based on this, this embodiment provides a testing device and method for the shear strength of anchors. By placing the specimen on a fastener located at the bottom, the lower edge of the specimen is suspended during the test, ensuring test accuracy. Simultaneously, the specimen is clamped by a fixing component, ensuring that it will not tip over during loading. Furthermore, when used in conjunction with a universal testing machine, the operation is simple and requires no additional manpower.
[0045] Please refer to Figures 1 to 5 This utility model provides a device for testing the shear resistance of anchors, comprising: a fixing unit, including two fixing members 1 and multiple fasteners 2; the fixing members 1 have a fixing section 10 and a clamping section 11 arranged at an angle, the fixing section 10 and the clamping section 11 are connected, and the fixing section 10 is used to connect to the test bench; the clamping sections 11 of the two fixing members 1 are connected by fasteners 2, and the distance between the two fixing members 1 along the first direction X is adjustable, so as to clamp or release the test specimen 3 in the first direction X; wherein, during the clamping process of the fixing members 1, the test specimen 3 is supported on the fasteners 2 located at the bottom, so as to leave a distance from the test bench; and a loading unit, used to apply pressure along the second direction Y to form a shear force on the anchor 30 on the test specimen 3. It should be noted that, in this embodiment, the loading unit may include a loading device and a loading head 4, the loading device may be a universal testing machine, which can apply tensile or compressive force to the test specimen 3, the test bench is matched with the universal testing machine and installed on the universal testing machine; the loading head 4 is as follows Figure 4 As shown, during the test, one end of the loading head 4 is detachably connected to the universal testing machine, and the other end contacts the anchor 30 of the specimen 3 to transfer the pressure applied by the universal testing machine to the anchor 30. The structure and principle of the universal testing machine can be found in existing technology, and will not be elaborated further in this embodiment.
[0046] As an optional embodiment, please refer to Figures 1 to 2Fasteners 2 are respectively inserted into the clamping sections 11 of the two fixing members 1 along the first direction X, and the spacing between the two fixing members 1 is adjusted by the locking action of nuts 21 and screws 20, thereby clamping the specimen 3; at the same time, the fixing section 10 is connected to the test bench by the fasteners 2. During the test, the specimen 3 is clamped by the clamping section 11 and fixed to the test bench by the fixing section 10, so that the specimen 3 will not overturn due to the additional bending moment when shear force is applied to the anchor 30. During the clamping process of the fixing members 1, the specimen 3 is supported on the fasteners 2 located at the bottom, so that the lower edge of the specimen 3 is suspended during the test, which will not affect the shear resistance of the anchor 30, and thus the shear bearing capacity of the anchor 30 itself can be accurately measured by the test. In addition, the loading unit applies pressure to the anchor 30 on the specimen 3 along the second direction Y, thereby forming a shear force on the anchor 30. Compared with the method of forming shear force by applying tension, this embodiment forms shear force by applying pressure, which further reduces the load-bearing capacity requirement of the fastener 2 connecting the fixed section 10 and the test bench, thereby reducing the test cost.
[0047] Please refer to Figure 2 and Figure 3 In an optional embodiment, the top and bottom of the clamping section 11 are respectively provided with through holes 110, and the fastener 2 includes a screw 20 and a nut 21; the screw 20 passes through the through holes 110 on the clamping section 11 of the two fixing members 1 along the first direction X, and the nut 21 is threaded to the screw 20 from both ends, and the nut 21 is movable on the screw 20 to adjust the distance between the two fixing members 1 along the first direction X; the test piece 3 is mounted on the screw 20 located at the bottom. Figure 2 As shown, during the clamping process of the clamping section 11, the specimen 3 is located between the two screws 20 along the second direction Y and is mounted on the screw 20 located at the bottom. Optionally, the specimen 3 can be centrally positioned between the two screws 20. In some embodiments of this application, when the operator uses the fixing member 1 to clamp the specimen 3, the screw 20 is first passed through the through holes 110 on the corresponding clamping sections 11 of the two fixing members 1 in sequence along the first direction X, and the nuts 21 are respectively sleeved on the screw 20 from both ends of the screw 20, with the internal thread of the nut 21 matching the external thread of the screw 20; then the specimen 3 is placed between the two fixing members 1 and mounted on the screw 20 at the bottom; then, according to the thickness of the specimen 3 (in this embodiment, the thickness of the specimen 3 is the length of the specimen 3 along the first direction X), the nuts 21 are rotated to change their relative position on the screw 20 until the clamping sections 11 of the two fixing members 1 abut against the two sides of the specimen 3 respectively, so as to complete the clamping of the specimen 3 by the fixing members 1.
[0048] Please continue to refer to this. Figure 2 and Figure 3In some embodiments of this application, the fixing segment 10 is connected to the test bench via fastener 2; a U-shaped hole 100 is provided at the end of the fixing segment 10 away from the clamping segment 11, the U-shaped hole 100 is open along the first direction X, the screw 20 passes through the U-shaped hole 100 and is connected to the test bench, and the screw 20 can move along the first direction X in the U-shaped hole 100; a nut 21 is provided at the end of the screw 20 away from the test bench. It should be noted that the U-shaped hole 100 being open along the first direction X means that the opening of the U-shaped hole 100 faces the first direction X. Optionally, during the process of connecting the fixing segment 10 and the test bench using the fastener 2, since the thickness of the specimen 3 may vary, while the position of the screw hole on the test bench is fixed, once the fixing member 1 has completed clamping the specimen 3, its size along the first direction X changes, and the fastener 2 may fail to connect the fixing segment 10 and the test bench due to the mismatch of the screw hole position. In this embodiment, by setting the U-shaped hole 100, even if the size of the fixing member 1 changes along the first direction X, the screw 20 can still move along the first direction X in the U-shaped hole 100, thereby matching the fixing screw hole of the test bench to complete the connection between the fixing section 10 and the test bench, further improving the practicality of the test device.
[0049] Preferably, the fastener 2 further includes a washer 22, which is sleeved on the screw 20 and located between the nut 21 and the clamping section 11 or the fixing section 10. This arrangement, by adding the washer 22 between the nut 21 and the clamping section 11, improves the tightening effect of the nut 21, preventing it from loosening. Furthermore, by increasing the contact area, it reduces the pressure of the nut 21's preload on the surface of the clamping section 11, thereby extending the service life of the fastener 1 and further reducing the cost of test consumables.
[0050] Please refer to Figure 1 and Figure 3 The fixing member 1 is provided with two clamping sections 11, which are arranged at intervals along the third direction Z, so that the anchor 30 of the specimen 3 can extend out from between the two clamping sections 11, so that the loading unit can directly apply shear force to the extended anchor 30. In this embodiment, a fixing member 1 is provided with two clamping sections 11 arranged at intervals along the third direction Z, and the two clamping sections 11 are respectively provided with through holes 110. The distance between the two through holes 110 should be less than the length of the specimen 3 along the third direction Z, so that the specimen 3 can be erected on the screws 20 located at the bottom of the two clamping sections 11 while being clamped, so as to ensure that the anchor 30 on the specimen 3 will not fall off from the screws 20 and contact the test bench under the action of shear force, thus affecting the measurement of the shear bearing capacity of the anchor 30.
[0051] Please refer to Figure 4The loading unit includes a loading device and a loading head 4. The loading device provides pressure. The loading head 4 has a connecting end 40 and a loading end 41 disposed opposite to each other. The connecting end 40 is detachably connected to the loading device. When the loading device applies pressure, the loading end 41 contacts the anchor 30 to transfer the pressure applied by the loading device to the anchor 30. Those skilled in the art will understand that the function of the loading head 4 is to transfer the pressure applied by the loading device to the anchor 30 to generate shear force on the anchor 30. When bearing pressure, there is a risk of instability. Therefore, the cross-sectional dimensions of the loading head 4 can be set to different sizes based on the shear bearing capacity of the anchor 30, provided that the loading head 4 does not become unstable. In this embodiment, the cross-sectional dimensions of the loading head 4 are 50mm × 70mm. As an optional embodiment, to facilitate the replacement of the loading head 4, the connecting end 40 is provided with a connecting hole 400, which is connected to the loading device via a pin. The operator can select a loading head 4 of appropriate size and connect it to the loading device according to the shear bearing capacity of the anchor 30.
[0052] Furthermore, a loading hole 410 is provided at the contact point between the loading end 41 and the anchor 30. The thickness of the loading head 4 at the loading hole 410 is less than the thickness at other locations. It should be noted that during the process of the loading head 4 transmitting pressure to the anchor 30 to form shear force, the shear force creates an additional bending moment at the root of the anchor 30. In order to maintain consistency with the shear force and additional bending moment transmitted to the anchor 30 by the connector in actual engineering, the thickness of the loading head 4 at the loading hole 410 is set to 10mm. At this time, when the loading hole 410 contacts the anchor 30 and transmits pressure, it can better conform to the actual situation, thereby obtaining shear performance parameters that match the actual situation.
[0053] Furthermore, the loading hole 410 opens along the second direction Y, and the loading hole 410 is U-shaped. It should be noted that the loading hole 410 opening along the second direction Y means that the opening of the loading hole 410 is oriented towards the second direction Y. In this embodiment, the loading hole 410 is used to contact the anchor 30 and apply pressure to the anchor 30. Therefore, the opening of the loading hole 410 is oriented downwards, which can both ensure the loading accuracy requirement and facilitate the downward loading of the loading device.
[0054] As an optional embodiment, the first direction X, the second direction Y, and the third direction Z are arranged perpendicular to each other. In this embodiment, the first direction X, the second direction Y, and the third direction Z are arranged perpendicular to each other. In other embodiments, the first direction X, the second direction Y, and the third direction Z can also be arranged at other angles, as long as it is ensured that the fixing unit can clamp the specimen 3 and fix it on the test table, and the loading unit can generate shear force on the anchor 30 by applying pressure.
[0055] In another embodiment, please refer to Figure 6 This utility model also provides a method for testing the shear performance of anchors, applied to the anchor shear performance testing device described above, comprising:
[0056] Step S1: Place specimen 3 between the two fixing members 1;
[0057] Step S2: Adjust the distance between the two fasteners 1 along the first direction X until the two fasteners 1 clamp the specimen 3;
[0058] Step S3: Connect the loading head 4 to the loading device;
[0059] Step S4: Connect the fixed section 10 to the test bench;
[0060] Step S5: Apply shear force to the anchor 30 on the specimen 3 along the second direction Y until the specimen 3 fails.
[0061] As an optional embodiment, before proceeding to step S1, the test specimen 3 needs to be processed according to the actual engineering situation, and an anchor 30 (a threaded sleeve in this embodiment) needs to be pre-embedded on the test specimen 3. The distance and embedment depth of the anchor 30 from the lower edge of the test specimen 3 should be consistent with the actual engineering situation. Therefore, when the height of the anchor 30 is greater than the embedment depth, that is, when the anchor 30 extends beyond the surface of the test specimen 3, the shear performance test of the anchor 30 can be directly performed using the loading unit; when the height of the anchor 30 is the same as the embedment depth, that is, when the anchor 30 is flush with the surface of the test specimen 3, a matching bolt needs to be screwed onto the anchor 30, and the shear performance test of the matching bolt needs to be performed.
[0062] In some embodiments of this application, in step S1, the operator sequentially inserts the nuts 21 along the first direction X into the through holes 110 of the clamping sections 11 of the two fixing members 1, and then puts the nuts 21 onto the screw 20 from both ends. The processed specimen 3 is then placed between the two fixing members 1, with the specimen 3 resting on the bottom screw 20. In step S2, based on the thickness of the specimen 3, the operator adjusts the relative position of the nuts 21 on the screw 20 by rotating them until the two clamping sections 11 abut against the two sides of the specimen 3, thus achieving clamping. In step S3, a loading head 4 that matches the size of the specimen 3 is selected, and the loading head 4 is connected to the loading device by a pin passing through the connecting hole 400 and the reserved hole in the loading device. In step S4, the operator positions the fixing unit according to the position of the loading head 4, ensuring that the highest point of the loading hole 410 is aligned with the highest point of the anchor 30, and that the surface of the loading head 4 is in contact with the surface of the specimen 3. After determining the position of the fixing unit, the nut 21 is passed through the U-shaped hole 100, and a suitable screw hole is selected within the range of the U-shaped hole 100. The nut 21 is inserted into the screw hole, and the fixing section 10 is connected to the test bench by tightening the nut 21. In step S5, pressure is applied using the loading device. The loading head 4 applies pressure to the anchor 30 and forms shear force. The loading device continuously loads at a certain rate until the specimen 3 fails. The loading device (universal testing machine) can record the deformation and related data that occur during the test. The operator can determine the shear bearing capacity of the anchor 30 by reviewing the relevant data recorded by the loading device (universal testing machine) during the test.
[0063] In summary, the anchor shear performance testing device provided in this embodiment includes: a fixing unit comprising two fixing members and multiple fasteners; each fixing member has a fixing section and a clamping section arranged at an angle, the fixing section being connected to the clamping section, and the fixing section being used to connect to the test bench; the clamping sections of the two fixing members are connected by fasteners, and the distance between the two fixing members along a first direction is adjustable to clamp or release the test specimen in the first direction; wherein, during the clamping process of the fixing members, the specimen is mounted on the fasteners located at the bottom, leaving a distance between it and the test bench; and a loading unit for applying pressure along a second direction to form a shear force on the anchors on the specimen.
[0064] This configuration, using fasteners to connect the clamping sections of the two fixing members, allows the specimen to be supported on the bottom fastener during clamping, ensuring that the lower edge of the specimen is suspended during testing, thus not affecting the shear capacity of the anchor and enabling accurate measurement of the anchor's shear bearing capacity. Simultaneously, the fixing members clamp the specimen through the clamping sections and connect to the test bench through the fixing sections, preventing the specimen from overturning due to additional bending moment during shear force application to the anchor. Furthermore, the loading unit applies pressure to the anchor along the second direction to generate shear force, which, compared to generating shear force through tension, reduces the connection strength requirements between the fixing section and the test bench, thereby reducing testing costs. The anchor shear performance testing device provided in this application can be used with a microcomputer-controlled universal testing machine to complete the test, offering high loading accuracy, simultaneous recording of test data, high efficiency, and reliable data.
[0065] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.
Claims
1. A device for testing the shear resistance of anchors, characterized in that, include: The fixing unit includes two fixing members and multiple fasteners; The fastener has a fixed section and a clamping section arranged at an angle, the fixed section being connected to the clamping section, and the fixed section being used to connect to the test bench; the clamping sections of the two fasteners are connected by the fastener, and the distance between the two fasteners along a first direction is adjustable to clamp or release the test specimen in the first direction; wherein, during the clamping process of the fastener, the test specimen is placed on the fastener located at the bottom, so as to maintain a distance from the test bench; And a loading unit for applying pressure along a second direction to generate shear force on the anchors on the specimen.
2. The anchor shear performance testing device as described in claim 1, characterized in that, The top and bottom of the clamping section are respectively provided with through holes, and the fastener includes a screw and a nut; The screw rods are respectively inserted into the through holes on the clamping sections of the two fixing members along the first direction. The nuts are respectively threaded to the screw rods from both ends. The nuts are movable on the screw rods to adjust the distance between the two fixing members along the first direction. The specimen is mounted on the screw located at the bottom.
3. The anchor shear performance testing device as described in claim 2, characterized in that, The fixed section is connected to the test bench via the fastener; The fixed section has a U-shaped hole at one end away from the clamping section. The U-shaped hole is open along the first direction. The screw passes through the U-shaped hole and is connected to the test bench. The screw can move in the U-shaped hole along the first direction. The nut is located at the end of the screw away from the test bench.
4. The anchor shear performance testing device as described in claim 2 or 3, characterized in that, The fastener also includes a washer, which is sleeved on the screw and located between the nut and the clamping section or the fixing section.
5. The anchor shear performance testing device as described in claim 2, characterized in that, The fastener is provided with two clamping sections, which are arranged at intervals along a third direction so that the anchor of the specimen can extend from between the two clamping sections.
6. The anchor shear performance testing device as described in claim 1, characterized in that, The loading unit includes a loading device and a loading head; The loading device is used to provide pressure; The loading head has a connecting end and a loading end that are disposed opposite to each other. The connecting end is detachably connected to the loading device. When the loading device applies pressure, the loading end contacts the anchor to convert the pressure applied by the loading device into the shear force of the anchor.
7. The anchor shear performance testing device as described in claim 6, characterized in that, A loading hole is also provided at the part of the loading end that contacts the anchor, and the thickness of the loading head at the loading hole is less than the thickness at other locations.
8. The anchor shear performance testing device as described in claim 7, characterized in that, The loading hole is open along the second direction and is U-shaped.
9. The anchor shear performance testing device as described in claim 6, characterized in that, The connecting end is provided with a connecting hole, which is connected to the loading device by a pin.
10. The anchor shear performance testing device as described in claim 5, characterized in that, The first direction, the second direction, and the third direction are perpendicular to each other.