Adjustable tray structure for shear experiment
By designing an adjustable pallet structure for shear experiments, the problem that existing shear-resistant instruments cannot detect the shear strength of the arch dam fault samples is solved, and direct and accurate detection of the shoulder fault strength of the arch dam is achieved, providing a theoretical basis for subsequent seam reinforcement.
Patent Information
- Application Number
- CN202421419031.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-06-20
AI Technical Summary
Existing shear resistance instruments cannot directly detect the shear strength of the arch dam fault samples, and cannot adjust according to the actual shear force and the angle of the fault joint.
An adjustable tray structure for shear experiments is designed, including a flat plate that can place the specimen, a single-sided bracket, a normal force handle, a C-stent and fixing bolts, through which the components can be adjusted according to the angle of the actual shear force to the fault joint and the normal stress is applied to the specimen.
The direct detection of the shoulder fault strength of the arch dam is achieved, and shear tests can be carried out more intuitively and accurately, providing measurement results of shear strength, and providing a theoretical basis for subsequent seam reinforcement.
Smart Images
Figure CN223051078U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a shear test device, in particular to an adjustable tray structure for shear tests. Background Art
[0002] The fault strength refers to the shear strength of the fault interface. For materials such as concrete, or the shear strength of the interface between concrete and other materials, there are already mature methods at home and abroad, and method standards have been formed, such as the "Test Code for Hydraulic Concrete" (SL / T 352-2020).
[0003] Existing detection of fault shear strength mostly uses a vertical shear force. However, for special scenarios, such as arch dams, when detecting the fault strength of the arch dam abutment, it is necessary to adjust according to the angle between the actual shear force and the fault joint. For this reason, the utility model proposes an adjustable tray structure for shear tests. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problem that existing shear instruments cannot directly detect the shear strength of arch dam fault samples, and provide a fault strength detector for the arch dam abutment, so as to carry out shear tests more intuitively and accurately.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] An adjustable tray structure for shear tests, including a flat plate on which a test piece can be placed. A single-side support is provided along the side of one side of the flat plate, and a normal force application handle is provided on the single-side support. A normal stress is applied to the test piece through the normal force application handle. A C-shaped support is provided on the other side of the flat plate. The C-shaped support forms a notch, and the width of the notch is greater than the width of the shear test piece. A fixing bolt is screwed on one side support of the C-shaped support where the notch is formed. One side of the joint of the shear test piece is inside the notch formed by the C-shaped support, and the joint side of the shear test piece is fixed with the fixing bolt.
[0007] The further technology of the utility model:
[0008] Preferably, the normal force application handle passes through the single-side support and is connected with a force application plate. A normal stress is applied to the test piece through the force application plate. The fixing bolt is connected with a disc, and the disc is in contact with one side of the joint of the shear test piece.
[0009] Preferably, the adjustable tray structure further includes a bottom plate, an annular track is provided on the bottom plate, connecting plates are provided at the four corners of the flat plate, fastening bolts are provided on the connecting plates, and sliders are connected to the bottoms of the fastening bolts. The sliders are slidably connected inside the annular track.
[0010] The beneficial effects of the utility model are:
[0011] Place the shear specimen on the shear tray, which can be adjusted according to the angle between the actual shear force and the fault joint, and then fasten the tray with fastening bolts; then fix one side of the joint of the shear specimen with a fixing bolt. After applying the normal stress to the specimen through the normal force application handle, the external shear head applies pressure to the other side of the specimen joint until this side falls off, completing the shear experiment.
[0012] During the shear experiment, while obtaining the shear strength, it is also possible to observe and measure the change trend of the normal force P after the specimen fails, providing a theoretical basis for subsequent joint reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0014] Figure 1 It is a schematic diagram of the adjustable tray structure in Embodiment 1;
[0015] Figure 2 It is a schematic diagram of the application structure of the adjustable tray structure;
[0016] The serial numbers in the above figures: 1 - arc plate, 2 - round hole, 3 - spring, 4 - force application handle, 5 - shear head, 6 - shear specimen, 7 - fault joint, 8 - flat plate, 9 - single-sided bracket, 10 - normal force application handle, 11 - C-shaped bracket, 12 - fixing bolt, 13 - force application plate, 14 - disc, 15 - bottom plate, 16 - annular track, 17 - connecting plate, 18 - fastening bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The following describes the preferred embodiments of the present invention with reference to the drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.
[0018] Embodiment 1, as Figure 1 shown, an adjustable tray structure for shear experiments, including a flat plate 8 on which the specimen can be placed. A single-sided bracket 9 is provided along the side on one side of the flat plate 8. A normal force application handle 10 is provided on the single-sided bracket 9. The normal stress is applied to the specimen through the normal force application handle 10. A C-shaped bracket is provided on the other side of the flat plate 8. The C-shaped bracket forms a notch, and the width of the notch is greater than the width of the shear specimen 6. A fixing bolt 12 is screwed on one side bracket of the notch formed by the C-shaped bracket. One side of the joint of the shear specimen 6 is within the notch formed by the C-shaped bracket, and the one side of the joint of the shear specimen 6 is fixed with the fixing bolt 12.
[0019] The normal force applying handle 10 passes through the single-side bracket 9 and is connected with an applying plate 13. A normal stress is applied to the test piece through the applying plate 13. The fixing bolt 12 is connected with a disc 14, and the disc 14 contacts one side of the joint of the shear test piece 6.
[0020] The adjustable tray structure further includes a bottom plate 15. An annular track 16 is provided on the bottom plate 15. Connecting plates 17 are provided at the four corners of the flat plate 8. Fastening bolts 18 are provided on the connecting plates 17. The bottom of the fastening bolt 18 is connected with a slider, and the slider is slidably connected in the annular track 16.
[0021] As Figure 2 FIG. is a schematic structural diagram of the application of the adjustable tray structure, which is specifically applied to a fault strength detector for the abutment of an arch dam, including an arc plate 1 simulating the arch dam. An arc-shaped round hole 2 is provided in the arc plate 1. A spring 3 is provided in the round hole 2. One end of the spring 3 extends out of the arc plate 1 and is provided with an applying handle 4, and the other end is provided with a shear head 5;
[0022] It further includes a shear test piece 6 located at the abutment of the simulated arch dam, that is, one end of the arc plate 1. A fault joint 7 is provided on the shear test piece 6. One side of the joint of the shear test piece 6 is fixed by a shear force tray, and the other side contacts the shear head 5. The spring 3 is compressed by the applying handle 4 to apply a shear load to the shear test piece 6, which is transmitted to the other side of the joint of the test piece by the shear head 5.
[0023] The arc plate 1 is an arc-shaped organic glass plate, and the situation of the spring 3 can be directly observed.
[0024] The arc surface formed by the arc surface of the arc plate 1 and the axis of the round hole 2 is a concentric circular arc.
[0025] First, place the shear test piece 6 on the shear force tray, then fix one side of the joint of the shear test piece 6 with the fixing bolt 12. After applying a normal stress to the test piece through the normal force applying handle 10, use the applying handle 4 to compress the spring 3 to apply a shear load to the shear test piece 6, which is transmitted to the other side of the joint of the test piece by the shear head 5 until this side falls off to complete the shear experiment.
[0026] The above are only the preferred embodiments of the present invention. Any person skilled in the art may modify the present invention by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solutions of the present invention falls within the scope of protection of the present invention.
Claims
1. An adjustable tray structure for shearing experiments, characterized in that: It comprises a flat plate on which a specimen can be placed, a single-sided bracket is arranged along the side of one side of the flat plate, a normal force adding handle is arranged on the single-sided bracket, normal stress is applied to the specimen through the normal force adding handle, a C-shaped bracket is arranged on the other side of the flat plate, a notch is formed by the C-shaped bracket, the width of the notch is greater than the width of the shear specimen, a fixing bolt is spirally arranged on the bracket on one side where the notch is formed by the C-shaped bracket, a joint side of the shear specimen is in the notch formed by the C-shaped bracket, and the joint side of the shear specimen is fixed by the fixing bolt.
2. An adjustable tray structure for shearing test according to claim 1, characterized in that: The normal force adding handle is connected with a adding plate after passing through the single-side bracket, and normal stress is added to the specimen through the adding plate. The fixing bolt is connected with a disc, and the disc contacts one side of the joint of the shear specimen.
3. An adjustable tray structure for shearing test according to claim 1, characterized in that: The adjustable tray structure also includes a bottom plate, which is provided with an annular track. The four corners of the flat plate are provided with connecting plates, which are provided with fastening bolts. The bottom of the fastening bolts is connected with a slider, which is slidably connected in the annular track.