Recycled concrete sample shearing anti-seismic test device

Abstract

The invention provides a recycled concrete sample shear anti-seismic test device, which comprises a test bed and a test box body, the test box body is arranged on the upper surface of the test bed, the test box body comprises a shell and a protective shell, a protective space is formed between the shell and the protective shell, an infrared heating mechanism is arranged in the protective space, and the infrared heating mechanism is arranged in the protective space. A thermal infrared imager is arranged on one side in the test box body, a first fixing mechanism is arranged at the top in the test box body, a second fixing mechanism is arranged at the bottom in the test box body, a shearing mechanism is fixedly arranged on one side of the test box body, the shearing mechanism comprises a hydraulic cylinder and a shearing head, the hydraulic cylinder is horizontally fixed on one side of the test box body, and the shearing head is fixedly arranged on the other side of the test box body. And the output end of the hydraulic cylinder is connected with a shearing head.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete seismic test, and particularly to a shear seismic test device for recycled concrete specimens. Background Art

[0002] Recycled concrete refers to new concrete prepared by crushing, cleaning and grading waste concrete blocks, mixing them in a certain proportion and gradation, and then adding cement, water, etc. Before using recycled concrete, it is necessary to first make recycled concrete into concrete test blocks, and use the concrete test blocks to conduct seismic, tensile and compressive tests to check the quality of construction engineering construction, so as to ensure that the buildings constructed with concrete in construction engineering meet the national regulations and standards.

[0003] However, in the existing shear detection instruments, the concrete test blocks are directly placed during the shear process, and no fixing structure is provided, which is easy to displace, resulting in poor shear effect and detection accuracy. At the same time, it causes a large impact on the instrument and is easy to damage the internal parts of the instrument. Since the compressive strength of concrete usually decreases with the increase of temperature, there is also a lack of consideration for seismic tests under sunlight in the prior art, lacking test accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide a shear seismic test device for recycled concrete specimens to solve the problems raised in the above background art.

[0005] The present invention is realized through the following technical solutions: A shear seismic test device for recycled concrete specimens includes a test bench and a test box body. The upper surface of the test bench is provided with a test box body. The test box body includes an outer shell and a protective shell. A protective space is formed between the outer shell and the protective shell. An infrared heating mechanism is provided in the protective space. An infrared thermal imager is provided on one side inside the test box body. A first fixing mechanism is provided at the inner top of the test box body. A second fixing mechanism is provided at the inner bottom of the test box body. A shear mechanism is fixedly provided on one side of the test box body. The shear mechanism includes a hydraulic cylinder and a shear head. The hydraulic cylinder is horizontally fixed on one side of the test box body, and the output end of the hydraulic cylinder is connected to the shear head.

[0006] Specifically, the first fixing mechanism includes a first electric telescopic rod. One end of the first electric telescopic rod is fixed to the inner top. First threaded holes are provided on both sides of the clamping member. First bolts are provided in the first threaded holes. One ends of the first bolts are fixedly connected to first fixing plates.

[0007] Specifically, the second fixing mechanism includes a fixing groove, and both sides of the fixing groove are provided with second threaded holes. Second bolts are provided in the second threaded holes, and one ends of the second bolts are fixedly connected to second fixing plates.

[0008] Specifically, displacement sensors are provided on both sides of the fixing groove.

[0009] Specifically, a vibration motor is provided at the bottom of the fixing groove.

[0010] Specifically, the infrared heating mechanism includes a second electric telescopic rod. A second electric telescopic rod is provided in the middle of the protection space, and an infrared heating lamp is fixedly connected to the output end of the second electric telescopic rod.

[0011] Specifically, a groove is provided in the middle of the protection housing. Sliding grooves are provided on both sides of the groove, and a third electric telescopic rod is provided at the bottom of the groove. A protection plate is fixedly connected to the output end of the third electric telescopic rod. Sliders are provided on both sides of the protection plate, and the sliders are slidably connected to the sliding grooves.

[0012] Specifically, the upper part of the groove is hollow and communicates with the protection space.

[0013] Specifically, a test door is provided on the front of the test box body, and an observation window is provided on the test door.

[0014] Specifically, the protection space formed between the outer shell and the protection housing is specifically located on one side of the test box body.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0016] A shear seismic test device for recycled concrete specimens provided by the present invention fixes the recycled concrete specimens through the first fixing mechanism and the second fixing mechanism, and then heats them through the infrared heating mechanism to simulate the seismic test under the condition of solar sunshine. The shear mechanism and the vibration motor are used to simulate the vibration and stress conditions of the recycled concrete specimens when they are affected by earthquakes, making the test more in line with the actual situation, improving the accuracy and effectiveness of the test, and monitoring the specific situation during the test through an infrared thermal imager. It can also explore the influence of temperature on the mechanical properties of recycled concrete materials, providing a basis for comprehensively evaluating the seismic resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 following drawings are only the preferred embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Structural sectional view of a shear seismic test device for recycled concrete specimens provided by the present invention.

[0019] Figure 2 Schematic structural view of the protective space formed by the housing and the protection provided by the present invention.

[0020] Figure 3 Schematic structural view of the groove provided by the present invention.

[0021] Figure 4 Schematic structural view of the test door and the observation window provided by the present invention.

[0022] In the figure, 1 is a test bench, 2 is a test box body, 3 is a housing, 4 is a protective housing, 5 is a protective space, 6 is an infrared thermal imager, 7 is a hydraulic cylinder, 8 is a shear head, 9 is a first electric telescopic rod, 10 is a clamping member, 11 is a first threaded hole, 12 is a first bolt 12, 13 is a first fixing plate, 14 is a fixing groove, 15 is a second threaded hole, 16 is a second bolt, 17 is a second fixing plate, 18 is a displacement sensor, 19 is a vibration motor, 20 is a second electric telescopic rod, 21 is an infrared heating lamp, 22 is a groove, 23 is a chute, 24 is a third electric telescopic rod, 25 is a protective plate, 26 is a slider, 27 is a test door, and 28 is an observation window. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present invention more obvious, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments of the present invention. It should be understood that the present invention is not limited by the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] In the following description, numerous specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known to those skilled in the art are not described.

[0025] It should be understood that the present invention can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0026] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present invention. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the related listed items.

[0027] To thoroughly understand the present invention, detailed structures will be presented in the following description to illustrate the technical solutions proposed by the present invention. The alternative embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may have other embodiments.

[0028] It should be noted that the first electric telescopic rod 9, the second electric telescopic rod 20, the third electric telescopic rod 24, the vibration motor 19, the displacement sensor 18, and the infrared thermal imager 6 mentioned in the present invention are all communicatively connected to a control panel (not shown).

[0029] See Figure 1 , Figure 2 and Figure 3 , a shear seismic test device for recycled concrete specimens, comprising a test bench 1 and a test box 2. The test bench 1 has a test box 2 on its upper surface. The test box 2 includes an outer shell 3 and a protective housing 4. A protective space 5 is formed between the outer shell 3 and the protective housing 4. An infrared heating mechanism is provided in the protective space 5. An infrared thermal imager 6 is provided on one side inside the test box 2. A first fixing mechanism is provided at the inner top of the test box, and a second fixing mechanism is provided at the inner bottom of the test box. A shear mechanism is fixedly provided on one side of the test box 2. The shear mechanism includes a hydraulic cylinder 7 and a shear head 8. The hydraulic cylinder 7 is horizontally fixed on one side of the test box 2, and the output end of the hydraulic cylinder 7 is connected to the shear head 8.

[0030] Exemplarily, for a shear seismic test device for recycled concrete specimens provided by the present invention, first, the bottom of the recycled concrete specimen is fixed by the second fixing mechanism at the inner bottom of the test box body, and then the top of the recycled concrete specimen is fixed by the first fixing mechanism at the inner top of the test box body 2 to make it firmly fixed. Secondly, by starting the infrared heating mechanism in the protection space 5, the infrared heating is carried out on one side of the recycled concrete specimen to simulate the situation that the wall made of recycled concrete materials is irradiated by the sun. After the heating is completed, the shear mechanism is started to provide a horizontal shear force to simulate the horizontal acting force of the earthquake on the recycled concrete structure. Specifically, by starting the hydraulic cylinder 7, the shear head 8 is moved to the acting position of the recycled concrete specimen. The hydraulic cylinder 7 makes the shear head 8 generate a horizontal shear force and acts on the recycled concrete specimen to start the shear seismic test. During the test, a thermal image is formed by the infrared thermal imager 6. With the help of the infrared thermal imager, the temperature change of the concrete during the application of shear force or vibration can be monitored in real time during the test, which can reflect the relationship between the stress state of the material and the temperature. When cracks and defects are formed inside or on the surface of the recycled concrete specimen, it will cause local temperature anomalies, which can be visually observed through the thermal image. The influence of temperature on the mechanical properties (such as strength, toughness, etc.) of recycled concrete materials can also be explored by monitoring the temperature change, providing a basis for comprehensively evaluating the seismic resistance ability.

[0031] Specifically, the first fixing mechanism includes a first electric telescopic rod 9. One end of the first electric telescopic rod 9 is fixed to the inner top. Both sides of the clamping member 10 are provided with first threaded holes 11. First bolts 12 are arranged in the first threaded holes 11, and one ends of the first bolts 12 are fixedly connected to first fixing plates 13.

[0032] Exemplarily, after the second fixing mechanism completes the fixing, according to the distance of the recycled concrete specimen, the telescopic length of the first electric telescopic rod 9 is adjusted so that the clamping member 10 contacts the top of the recycled concrete specimen. Then, by turning the first bolts 12, the first fixing plates 13 on both sides contact the recycled concrete specimen to fix the top.

[0033] Specifically, the second fixing mechanism includes a fixing groove 14. Second threaded holes 15 are provided on both sides of the fixing groove 14. Second bolts 16 are arranged in the second threaded holes 15, and one ends of the second bolts 16 are fixedly connected to second fixing plates 17.

[0034] Exemplarily, the second fixing mechanism specifically fixes the bottom by placing the recycled concrete specimen at the fixed position of the fixing groove 14, and then turning the second bolts 16 so that the second fixing plates 17 on both sides contact the recycled concrete specimen.

[0035] Specifically, displacement sensors 18 are provided on both sides of the fixed groove 14.

[0036] Exemplarily, the displacement sensors 18 are used to measure the displacement distance of the recycled concrete specimen during the seismic test.

[0037] Specifically, a vibration motor 19 is provided at the bottom of the fixed groove 14.

[0038] Exemplarily, the vibration motor 19 is used to simulate the vibration of the ground surface during an earthquake, and together with the horizontal shear force provided by the shear mechanism, it simulates a more realistic stress situation during an earthquake.

[0039] Specifically, the infrared heating mechanism includes a second electric telescopic rod 20. The second electric telescopic rod 20 is provided in the middle of the protection space 5, and an infrared heating lamp 21 is fixedly connected to the output end of the second electric telescopic rod 20.

[0040] Exemplarily, the infrared heating lamp 21 can move within the protection space 5 and can freely pass through the upper part of the groove 22. When the recycled concrete specimen is fixed, the second electric telescopic rod 20 is activated to bring the infrared heating lamp 21 close to the recycled concrete specimen to start heating, simulating the situation where the wall made of recycled concrete material is exposed to sunlight.

[0041] Specifically, a groove 22 is provided in the middle of the protection housing 4. Sliding grooves 23 are provided on both sides of the groove 22, and a third electric telescopic rod 24 is provided at the bottom of the groove 22. A protection plate 25 is fixedly connected to the output end of the third electric telescopic rod 24. Sliders 26 are provided on both sides of the protection plate 25, and the sliders 26 are slidably connected to the sliding grooves 23.

[0042] Specifically, the upper part of the groove 22 is hollow and communicates with the protection space 5.

[0043] Exemplarily, before heating, the protection plate 25 exactly covers the upper part of the groove 22. When the infrared heating mechanism needs to perform heating work, the third electric telescopic rod 24 at the bottom of the groove 22 moves downward, and the sliders 26 on the protection plate 25 slide downward along the sliding grooves 23 on both sides of the groove 22, causing the protection plate 25 to fall into the lower part of the groove 22, and the upper part of the groove 22 is in an open state.

[0044] Specifically, referring to Figure 4 , a test door 27 is provided on the front of the test box body 2, and an observation window 28 is provided on the test door 27.

[0045] Exemplarily, the test door 27 facilitates putting the recycled concrete specimen into the test box body 2 for a series of operations, and the observation window 28 can observe the specific situation occurring during the test process.

[0046] Specifically, the protective space 5 formed between the outer shell 3 and the protective housing 4 is specifically located on one side of the test chamber 2.

[0047] Exemplarily, the protective space 5 formed between the outer shell 3 and the protective housing 4 is specifically located on one side of the test chamber 2 in order to more accurately simulate the situation in actual conditions where the sun usually only shines on one side of the wall.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A shear seismic test device for recycled concrete specimens, comprising a test bench and a test box body, characterized in that, The upper surface of the test bench is provided with a test box body, and the test box body includes an outer shell and a protective shell. A protective space is formed between the outer shell and the protective shell, and an infrared heating mechanism is arranged in the protective space. An infrared thermal imager is arranged on one side inside the test box body. A first fixing mechanism is arranged at the inner top of the test box body, and a second fixing mechanism is arranged at the inner bottom of the test box body. A shearing mechanism is fixedly arranged on one side of the test box body, and the shearing mechanism includes a hydraulic cylinder and a shearing head. The hydraulic cylinder is horizontally fixed on one side of the test box body, and the output end of the hydraulic cylinder is connected with the shearing head.

2. The shear seismic test device for recycled concrete specimens according to claim 1, characterized in that, The first fixing mechanism includes a first electric telescopic rod. One end of the first electric telescopic rod is fixed at the inner top of the test box body, and the output end of the first electric telescopic rod is fixedly connected with a clamping member. First threaded holes are arranged on both sides of the clamping member, and first bolts are arranged in the first threaded holes. One ends of the first bolts are fixedly connected with first fixing plates.

3. The shear seismic test device for recycled concrete specimens according to claim 2, characterized in that, The second fixing mechanism includes a fixing groove. Second threaded holes are arranged on both sides of the fixing groove, and second bolts are arranged in the second threaded holes. One ends of the second bolts are fixedly connected with second fixing plates.

4. A shear seismic test device for recycled concrete specimens according to claim 3, characterized in that, Displacement sensors are arranged on both sides of the fixing groove.

5. The shear seismic test device for recycled concrete specimens according to claim 4, characterized in that, A vibration motor is arranged at the bottom of the fixing groove.

6. The shear seismic test device for recycled concrete specimens according to claim 5, characterized in that, The infrared heating mechanism includes a second electric telescopic rod. A second electric telescopic rod is arranged in the middle of the protective space, and the output end of the second electric telescopic rod is fixedly connected with an infrared heating lamp.

7. The shear seismic test device for recycled concrete specimens according to claim 6, characterized in that, A groove is arranged at the middle of the protective shell. Sliding grooves are arranged on both sides of the groove, and a third electric telescopic rod is arranged at the bottom of the groove. The output end of the third electric telescopic rod is fixedly connected with a protective plate. Sliders are arranged on both sides of the protective plate, and the sliders are slidably connected with the sliding grooves.

8. A shear seismic test device for recycled concrete specimens according to claim 7, characterized in that, The upper part of the groove is hollow and communicates with the protective space.

9. The shear seismic test device for recycled concrete specimens according to claim 8, characterized in that, A test door is arranged on the front of the test box body, and an observation window is arranged on the test door.

10. A shear seismic test device for recycled concrete specimens according to claim 9, characterized in that, The protective space formed between the outer shell and the protective shell is specifically located on one side of the test box body.

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