Testing device and testing method for shearing resistance of anchoring part

Abstract

The invention provides a device and method for testing the shear resistance of an anchoring part, and the device comprises a fixing unit which comprises two fixing parts and a plurality of fastening parts; the fixing piece is provided with a fixing section and a clamping section which are arranged at an angle, and the fixing section is connected with the clamping section; the clamping sections of the two fixing pieces are connected through a fastening piece, and the distance between the two fixing pieces in the first direction can be adjusted. Wherein the test piece frame is arranged on the fastener at the bottom, so that a distance is reserved between the test piece frame and the test bed; and the loading unit is used for applying pressure along the second direction to form a shearing force on the anchoring part on the test piece. According to the configuration, the test piece is erected on the fastener located at the bottom, it is guaranteed that the lower edge of the test piece is suspended in the testing process, and the shear bearing capacity of the anchoring piece is accurately tested; meanwhile, the fixing piece clamps the test piece through the clamping section and is connected with the test bed through the fixing section, so that the test piece cannot roll over due to additional bending moment in the process that the anchoring piece is subjected to shearing force.

Description

Technical Field

[0001] The invention relates to the field of construction engineering detection, in particular to an anchor shear performance test device and a test method. Background Art

[0002] The connection nodes between the ultra-high performance concrete external wall panels and the keel or main structure are generally pre-embedded stainless steel threaded sleeves in the ultra-high performance concrete external wall panels, and the bolt fasteners are passed through the connecting parts and fixed to the stainless steel threaded sleeves, thereby realizing the connection between the ultra-high performance concrete external wall panels and the 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] At present, there is no universal testing device for the shear bearing capacity detection of embedded threaded sleeves. When testing the shear bearing capacity of anchors in some projects, a jack is used to apply thrust to the embedded sleeves or bolts 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] Based on this, how to improve detection accuracy and reduce operation difficulty has become a technical problem that technical personnel in this field need to solve. Summary of the invention

[0006] The purpose of the present invention is to provide an anchor shear performance test device and test method to solve the problems in the prior art that there is no device dedicated to the anchor shear performance test, and the current test method has difficult control of detection accuracy and is inconvenient to operate.

[0007] In order to achieve the above object, the present invention provides an anchor shear performance test device, comprising:

[0008] A fixing unit, comprising two fixing members and a plurality of fasteners;

[0009] The fixing member has a fixing section and a clamping section arranged at an angle, the fixing section is connected to the clamping section, and the fixing section is used to connect to the test bench; the clamping sections of the two fixing members are connected by the fastener, and the spacing between the two fixing members along the first direction is adjustable to achieve clamping or unclamping of the test piece to be tested in the first direction; wherein, during the clamping process of the fixing member, the test piece is mounted on the fastener located at the bottom to leave a spacing with the test bench;

[0010] and a loading unit for applying pressure in a second direction to form a shear force on the anchor 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, and the nuts are respectively threadedly connected to the screw rods from both ends of the screw rods, and the nuts are movable on the screw rods to adjust the distance between the two fixing members along the first direction;

[0013] The test piece is mounted on the screw rod at the bottom.

[0014] Optionally, the fixing section is connected to the test bench via the fastener;

[0015] A U-shaped hole is formed at one end of the fixing section away from the clamping section, and the U-shaped hole is open along the first direction. The screw rod is passed through the U-shaped hole and is connected to the test bench, and the screw rod can move in the U-shaped hole along the first direction; the nut is arranged at one end of the screw rod away from the test bench.

[0016] Optionally, the fastener further includes a gasket, which is sleeved on the screw rod and located between the nut and the clamping section or the fixing section.

[0017] Optionally, the fixing member is provided with two clamping sections, and the two clamping sections are arranged at intervals along the 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 relatively arranged, and the connecting end is detachably connected to the loading device; when the loading device applies pressure, the loading end contacts the anchor to transfer and convert the pressure applied by the loading device into shear force of the anchor.

[0021] Optionally, a loading hole is further provided at a portion where the loading end contacts the anchor, and the thickness of the loading head at the loading hole is smaller than the thickness at other positions.

[0022] Optionally, the loading hole is open along the second direction, and the loading hole is U-shaped.

[0023] Optionally, a connecting hole is provided on the connecting end, and the connecting hole is connected to the loading device via a pin.

[0024] In order to achieve the above object, the present invention further provides a method for testing the shear resistance of an anchor, which is applied to the above-mentioned anchor shear resistance testing device, comprising:

[0025] Place the test piece between two fixtures;

[0026] Adjusting the distance between the two fixing members along the first direction until the two fixing members clamp the test piece;

[0027] Connecting the loading head to the loading device;

[0028] Connect the fixed section to the test bench;

[0029] A shear force is applied to the anchor on the specimen along a second direction until the specimen is destroyed.

[0030] Compared with the existing anchor shear bearing capacity measurement method, the anchor shear performance test device and test method provided by the present application have the following advantages:

[0031] The anchor shear performance test device provided in the present application uses a fastener to connect the clamping sections of two fixings, so that the test piece can be mounted on the fastener located at the bottom during the clamping process of the fixing, ensuring that the lower edge of the test piece is suspended during the test and does not affect the shear resistance of the anchor, thereby accurately measuring the shear bearing capacity of the anchor; at the same time, the fixing clamps the test piece through the clamping section and is connected to the test bench through the fixing section, so that during the process of shear force being applied to the anchor, the test piece will not be overturned due to the additional bending moment; in addition, the loading unit applies pressure to the anchor along the second direction to generate shear force on the anchor, which can reduce the connection strength requirements between the fixing section and the test bench compared to the method of generating shear force by applying tensile force, thereby reducing the test cost; the anchor shear performance test device provided in the present application can cooperate with a microcomputer-controlled universal testing machine to complete the test, with high loading accuracy, synchronous recording of test data, high efficiency and reliable data.

[0032] Furthermore, a U-shaped hole is formed at one end of the fixing section away from the clamping section, and the screw rod can move in the U-shaped hole along a first direction, so that when the thickness of the test piece is different, the fixing section and the test bench can still be connected by the fastener.

[0033] Furthermore, a loading hole is provided at the position where the loading end contacts the anchor, and the thickness of the loading head at the loading hole is smaller than the thickness at other positions, so as to better simulate the shear force and additional bending moment transmitted to the anchor by the connecting part in actual engineering; at the same time, the loading hole is open along the second direction, and the loading hole is U-shaped, which can not only ensure the loading progress, but also facilitate the loading device to load downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A schematic diagram of the structure of an anchor shear performance test device provided in an embodiment of the present invention;

[0035] Figure 2 A side view of a fixing member clamping a test piece provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the structure of a fixing member provided in an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the structure of a loading head provided by an embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the structure of a test piece provided in an embodiment of the present invention;

[0039] Figure 6 A flow chart of a method for testing the shear resistance of an anchor provided in an embodiment of the present invention.

[0040] The description of each reference numeral is as follows:

[0041] 1-fixing member; 10-fixing section; 11-clamping section; 100-U-shaped hole; 110-through hole;

[0042] 2-fastener; 20-screw; 21-nut; 22-washer;

[0043] 3-test piece; 30-anchor;

[0044] 4-loading head; 40-connecting end; 41-loading end; 400-connecting hole; 410-loading hole;

[0045] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0046] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with 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 conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0047] As used in this specification, the singular forms "a", "an" and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the term "at least two" is generally used to include the meaning of "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "the proximal end" and "the distal end" generally refer to two corresponding parts, which include not only the endpoints, and the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, as used in this specification, an element 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 may be direct or indirect through an intermediate element, and it cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element may be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. The terms "upper", "lower", "top" and "bottom" are generally relative position relationships arranged in the direction of gravity; the terms "vertical, vertical direction" generally refer to the direction of gravity, which is generally perpendicular to the ground, and "horizontal, horizontal plane direction" generally refers to the direction parallel to the ground; for ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0048] The purpose of the present invention is to provide an anchor shear performance test device and test method to solve the problems that there is no device dedicated to the anchor shear performance test in the prior art, and the current test method has low detection accuracy and inconvenient operation.

[0049] Those skilled in the art can understand that there is no test device specifically used to detect the shear resistance of embedded anchors in the prior art. Therefore, when testing the shear bearing capacity of embedded anchors in some projects, a manual hydraulic loader is used to directly apply thrust to the embedded anchors for shear resistance testing. The above method requires manual control of the loading force, and the displacement during the test needs to be manually read and recorded. The test accuracy is not easy to control and requires manpower. Based on this, the present embodiment provides an anchor shear resistance test device and test method. By setting the test piece on the fastener at the bottom, the lower edge of the test piece is suspended during the test, thereby ensuring the accuracy of the test; at the same time, the test piece is clamped by the fixing piece to ensure that the test piece will not tip over during the loading process, and it is used in conjunction with a universal testing machine, which is simple to operate and does not require additional manpower.

[0050] Please refer to Figures 1 to 5 The present invention provides a test device for the shear resistance of anchors, comprising: a fixing unit, comprising two fixing members 1 and a plurality of fasteners 2; the fixing member 1 has a fixing section 10 and a clamping section 11 set at an angle, the fixing section 10 is connected to the clamping section 11, 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 the fastener 2, and the spacing between the two fixing members 1 along the first direction X is adjustable to achieve clamping or unclamping of the test piece 3 to be tested in the first direction X; wherein, during the clamping process of the fixing member 1, the test piece 3 is mounted on the fastener 2 located at the bottom to leave a spacing with the test bench; and a loading unit, which is used to apply pressure along the second direction Y to form a shear force on the anchor 30 on the test piece 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 tension or pressure to the test piece 3, the test bench matches the universal testing machine and is installed on the universal testing machine; the loading head 4 is as 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 is in contact with the anchor 30 of the test piece 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 referred to the prior art, and this embodiment will not be repeated here.

[0051] As an alternative embodiment, please refer to Figure 1 to Figure 2, the fasteners 2 are respectively inserted into the clamping sections 11 of the two fixing members 1 along the first direction X, and the function of adjusting the distance between the two fixing members 1 is realized through the locking action of the nut 21 and the screw 20, so that the test piece 3 can be clamped; at the same time, the fixing section 10 is connected to the test bench through the fastener 2. During the test, the test piece 3 is clamped by the clamping section 11, and is fixed to the test bench by the fixing section 10, so that when the shear force is applied to the anchor 30, the test piece 3 will not be overturned due to the additional bending moment. During the process of being clamped by the fixing member 1, the test piece 3 is mounted on the fastener 2 located at the bottom, so that the lower edge of the test piece 3 is suspended during the test, which will not affect the shear performance of the anchor 30, and the shear bearing capacity of the anchor 30 itself can be accurately measured through 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 tensile force, this embodiment forms shear force by applying pressure, which further reduces the bearing capacity requirement of the fastener 2 connecting the fixing section 10 and the test bench, thereby reducing the test cost.

[0052] 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 is respectively passed through the through holes 110 on the clamping sections 11 of the two fixing members 1 along the first direction X, and the nut 21 is respectively threadedly connected to the screw 20 from both ends of the screw 20, 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 at the bottom. Figure 2 As shown, when the specimen 3 is clamped by the clamping section 11 , it is located between the two screw rods 20 along the second direction Y and is mounted on the screw rod 20 at the bottom. Optionally, the specimen 3 can be centrally arranged between the two screw rods 20 . In some embodiments of the present application, when the operator uses the fixing member 1 to clamp the specimen 3, the operator first passes the screw 20 through the through holes 110 on the corresponding clamping sections 11 on the two fixing members 1 in sequence along the first direction X, and respectively sleeves the nut 21 on the screw 20 from both ends of the screw 20, and the internal thread of the nut 21 matches 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; thereafter, according to the thickness of the specimen 3 (in the present embodiment, the thickness of the specimen 3 is the length of the specimen 3 along the first direction X), the nut 21 is rotated to change its relative position on the screw 20 until the clamping sections 11 of the two fixing members 1 respectively abut against the two side surfaces of the specimen 3, so as to complete the clamping of the specimen 3 by the fixing member 1.

[0053] Please continue to refer to Figure 2 and Figure 3In some embodiments of the present application, the fixing section 10 is connected to the test bench through the fastener 2; a U-shaped hole 100 is provided at one end of the fixing section 10 away from the clamping section 11, the U-shaped hole 100 is open along the first direction X, a screw 20 is passed through the U-shaped hole 100 and connected to the test bench, and the screw 20 can move in the U-shaped hole 100 along the first direction X; a nut 21 is provided at one end of the screw 20 away from the test bench. It should be noted that the U-shaped hole 100 is open along the first direction X means that the opening of the U-shaped hole 100 is opened toward the first direction X. Optionally, when the operator uses the fastener 2 to connect the fixing section 10 and the test bench, since the thickness of the test piece 3 may be different, and the position of the screw hole on the test bench is fixed, once the fixing member 1 completes the clamping of the test piece 3, its size along the first direction X changes, and the fastener 2 may not be able to connect the fixing section 10 and the test bench due to the mismatch of the screw hole position. In this embodiment, through the setting of the U-shaped hole 100, even if the size of the fixing member 1 along the first direction X changes, the screw 20 can move in the U-shaped hole 100 along the first direction X, and then match 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.

[0054] Preferably, the fastener 2 further includes a gasket 22, which is sleeved on the screw rod 20 and located between the nut 21 and the clamping section 11 or the fixing section 10. In this way, the gasket 22 is added between the nut 21 and the clamping section 11, which can improve the fastening effect of the nut 21 and prevent the nut 21 from loosening on the one hand, and can also reduce the pressure of the pre-tightening force of the nut 21 on the surface of the clamping section 11 by increasing the contact area on the other hand, thereby improving the service life of the fixing member 1 and further reducing the cost of test consumables.

[0055] Please refer to Figure 1 and Figure 3 , the fixing member 1 is provided with two clamping sections 11, and the two clamping sections 11 are arranged at intervals along the third direction Z, so that the anchor 30 of the specimen 3 can extend 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, one 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 correspondingly provided with through holes 110, and 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 respectively mounted on the screws 20 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 screw 20 and contact with the test bench under the action of shear force, affecting the measurement of the shear bearing capacity of the anchor 30.

[0056] Please refer to Figure 4The loading unit includes a loading device and a loading head 4; the loading device is used to provide pressure; the loading head 4 has a connecting end 40 and a loading end 41 which are arranged opposite to each other, and 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. It can be understood by those skilled in the art that the function of the loading head 4 is to transfer the pressure applied by the loading device to the anchor 30 to form a shear force on the anchor 30, which will be at risk of instability when bearing pressure. Therefore, the cross-sectional dimensions of the loading head 4 can be set to different sizes according to the shear bearing capacity of the anchor 30 and on the premise that the loading head 4 is not unstable. In this embodiment, the cross-sectional dimensions of the loading head 4 are 50 mm×70 mm. As an optional embodiment, in order to facilitate the replacement of the loading head 4, a connecting hole 400 is provided on the connecting end 40, and the connecting hole 400 is connected to the loading device through a pin shaft. The operator can select a loading head 4 of a suitable size to connect to the loading device according to the shear bearing capacity of the anchor 30.

[0057] Furthermore, a loading hole 410 is provided at the part where the loading end 41 contacts the anchor 30, and the thickness of the loading head 4 at the loading hole 410 is less than the thickness at other positions. It should be noted that in the process of the loading head 4 transmitting pressure to the anchor 30 to form a shear force, the shear force has an additional bending moment on the root of the anchor 30. In order to be consistent with the shear force and additional bending moment transmitted to the anchor 30 by the connector in the actual project, the thickness of the loading head 4 at the loading hole 410 is set to 10 mm. At this time, when the loading hole 410 contacts the anchor 30 and transmits pressure, it can better fit the actual situation, thereby obtaining shear performance parameters that match the actual situation.

[0058] Furthermore, the loading hole 410 is open along the second direction Y, and the loading hole 410 is U-shaped. It should be noted that the loading hole 410 is open along the second direction Y means that the opening of the loading hole 410 is set toward 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 set downward, which can not only ensure the loading accuracy requirements but also facilitate the loading device to load downward.

[0059] 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 may also be arranged at other angles, as long as the fixing unit can clamp the specimen 3 and fix it on the test bench, and the loading unit can generate shear force on the anchor 30 by applying pressure.

[0060] In another embodiment, please refer to Figure 6 The present invention also provides a method for testing the shear resistance of an anchor, which is applied to the above-mentioned anchor shear resistance testing device, comprising:

[0061] Step S1: placing the test piece 3 between two fixing members 1;

[0062] Step S2: adjusting the distance between the two fixing members 1 along the first direction X until the two fixing members 1 clamp the test piece 3;

[0063] Step S3: connecting the loading head 4 to the loading device;

[0064] Step S4: connecting the fixed section 10 to the test bench;

[0065] Step S5: applying shear force to the anchor 30 on the specimen 3 along the second direction Y until the specimen 3 is destroyed.

[0066] As an optional embodiment, before performing step S1, the test piece 3 to be tested needs to be processed according to the actual engineering situation, and an anchor 30 (a threaded sleeve in this embodiment) is pre-embedded on the test piece 3 to be tested, and the distance and burial depth of the anchor 30 to the lower edge of the test piece 3 are consistent with the actual engineering. Therefore, when the height of the anchor 30 is greater than the burial depth, that is, when the anchor 30 extends out of the surface of the test piece 3, the shear resistance performance test of the anchor 30 can be directly performed using the loading unit; when the height of the anchor 30 is consistent with the burial depth, that is, when the anchor 30 is flush with the surface of the test piece 3, it is necessary to screw the matching bolts on the anchor 30 and perform the shear resistance performance test on the matching bolts.

[0067] In some embodiments of the present application, in step S1, the operator inserts the nut 21 into the through hole 110 of the clamping section 11 of the two fixing members 1 in sequence along the first direction X, and respectively sleeves the nut 21 on the screw 20 from both ends of the screw 20, and then places the processed specimen 3 between the two fixing members 1, and at the same time, the specimen 3 is mounted on the screw 20 at the bottom. In step S2, the operator adjusts the relative position of the nut 21 on the screw 20 by rotating the nut 21 based on the thickness of the specimen 3, until the two clamping sections 11 respectively abut against the two side surfaces of the specimen 3 to achieve clamping. In step S3, first select a loading head 4 that matches the size of the specimen 3, and connect the loading head 4 to the loading device by inserting a pin through the connection hole 400 and the reserved hole in the loading device. In step S4, the operator places the position of the fixing unit according to the position of the loading head 4, ensures that the highest point of the loading hole 410 is aligned with the highest point of the anchor 30, and 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 within the range of the U-shaped hole 100, a suitable screw hole is selected, the nut 21 is inserted into the screw hole, and the connection between the fixing section 10 and the test bench is achieved by tightening the nut 21. In step S5, a loading device is used to apply pressure, and the loading head 4 applies pressure to the anchor 30 and forms a shear force. The loading device continues to load at a certain rate until the specimen 3 is damaged. 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 viewing the related data recorded during the test of the loading device (universal testing machine).

[0068] In summary, in the anchor shear performance test device and test method provided in the embodiments of the present invention, the anchor shear performance test device includes: a fixing unit, including two fixing members and a plurality of fasteners; the fixing member has a fixing section and a clamping section arranged at an angle, the fixing section is connected to the clamping section, and the fixing section is used to connect to the test bench; the clamping sections of the two fixing members are connected by fasteners, and the spacing between the two fixing members along the first direction is adjustable to achieve clamping or unclamping of the specimen to be tested in the first direction; wherein, during the clamping process of the fixing member, the specimen is mounted on the fastener located at the bottom to leave a spacing with the test bench; and a loading unit, used to apply pressure along the second direction to form a shear force on the anchor on the specimen.

[0069] With such configuration, by using fasteners to connect the clamping sections of the two fixings, the test piece can be mounted on the fasteners located at the bottom during the clamping process of the fixing pieces, thereby ensuring that the lower edge of the test piece is suspended during the test and does not affect the shear resistance of the anchor, thereby accurately measuring the shear bearing capacity of the anchor; at the same time, the fixing piece clamps the test piece through the clamping section and is connected to the test bench through the fixing section, so that during the process of shear force being applied to the anchor, the test piece will not overturn due to the additional bending moment; in addition, the loading unit applies pressure to the anchor along the second direction to generate shear force on the anchor, which can reduce the connection strength requirements between the fixing section and the test bench compared to the method of generating shear force by applying tensile force, thereby reducing the test cost; the anchor shear performance test device provided in the present application can cooperate with a microcomputer-controlled universal testing machine to complete the test, with high loading accuracy, synchronous recording of test data, high efficiency and reliable data.

[0070] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An anchor shear performance test device, characterized in that: include: A fixing unit, comprising two fixing members and a plurality of fasteners; The fixing member has a fixing section and a clamping section arranged at an angle, the fixing section is connected to the clamping section, and the fixing section is used to connect to the test bench; the clamping sections of the two fixing members are connected by the fastener, and the spacing between the two fixing members along the first direction is adjustable to achieve clamping or unclamping of the test piece to be tested in the first direction; wherein, during the clamping process of the fixing member, the test piece is mounted on the fastener located at the bottom to leave a spacing with the test bench; and a loading unit for applying pressure in a second direction to form a shear force on the anchor on the specimen.

2. The anchor shear performance test device according to claim 1, characterized in that: The top and bottom of the clamping section are respectively provided with through holes, and the fastener comprises 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, and the nuts are respectively threadedly connected to the screw rods from both ends of the screw rods, and the nuts are movable on the screw rods to adjust the distance between the two fixing members along the first direction; The test piece is mounted on the screw rod at the bottom.

3. The anchor shear performance test device according to claim 2, characterized in that: The fixing section is connected to the test bench via the fastener; A U-shaped hole is formed at one end of the fixing section away from the clamping section, and the U-shaped hole is open along the first direction. The screw rod is passed through the U-shaped hole and is connected to the test bench, and the screw rod can move in the U-shaped hole along the first direction; the nut is arranged at one end of the screw rod away from the test bench.

4. The anchor shear performance test device according to claim 2 or 3, characterized in that: The fastener also includes a gasket, which is sleeved on the screw rod and located between the nut and the clamping section or the fixing section.

5. The anchor shear performance test device according to claim 2, characterized in that: The fixing member is provided with two clamping sections, and the two clamping sections are arranged at intervals along the third direction so that the anchor of the specimen can extend from between the two clamping sections.

6. The anchor shear performance test device according to 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 arranged opposite to each other, and 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 a shear force of the anchor.

7. The anchor shear performance test device according to claim 6, characterized in that: A loading hole is also provided at the portion where the loading end contacts the anchoring piece, and the thickness of the loading head at the loading hole is smaller than the thickness at other positions.

8. The anchor shear performance test device according to claim 7, characterized in that: The loading hole is open along the second direction, and the loading hole is U-shaped.

9. The anchor shear performance test device according to claim 6, characterized in that: The connecting end is provided with a connecting hole, and the connecting hole is connected to the loading device through a pin shaft.

10. A method for testing the shear resistance of an anchor, characterized in that: The anchor shear performance test device used in any one of claims 1 to 9 comprises: Place the test piece between two fixtures; Adjusting the distance between the two fixing members along the first direction until the two fixing members clamp the test piece; Connecting the loading head to the loading device; Connect the fixed section to the test bench; A shear force is applied to the anchor on the specimen along a second direction until the specimen is destroyed.

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