Concrete member environment and load coupling test device

Abstract

The invention discloses a concrete member environment and load coupling test device, and belongs to the technical field of concrete detection.The concrete member environment and load coupling test device comprises a device body, a test cavity is formed in the inner side of the device body, a supporting plate is fixed to the inner side of the test cavity, an open hole is formed in the middle of the supporting plate, and a rubber sealing plate is fixed in the open hole; a strip-shaped hole is formed in the middle of the rubber sealing plate, the upper side of the rubber sealing plate is fixedly connected with a test piece through a locking piece, the projection of the test piece in the vertical direction is located in the rubber sealing plate, the test piece seals the strip-shaped hole, and a fatigue loading assembly used for loading the test piece is installed on the inner side of the device body. A cylindrical water tank is fixed to the upper side of the supporting plate and surrounds the outer sides of the test piece and the rubber sealing plate, and a sealing piston plate is installed at an upper opening of the cylindrical water tank in a sliding and sealing mode and connected to a hydraulic cylinder. The device provided by the invention can improve the sealing effect of the test piece and the corrosion box during a test, and ensures smooth proceeding of the test.

Description

Technical Field

[0001] This invention belongs to the field of concrete testing technology, specifically relating to a test device for environmental and load coupling of concrete components. Background Technology

[0002] In addition to additional loads, some new structures such as high-rise buildings, gravity-fed offshore platforms, and concrete protective layers of nuclear power plants are also subject to environmental factors such as chloride and sulfate corrosion, temperature changes, and freeze-thaw cycles, which accelerate internal damage to materials or structures. For example, chloride penetration into concrete can cause steel reinforcement to corrode. On the one hand, the load-bearing capacity of the steel reinforcement decreases; on the other hand, the corrosion and expansion of the steel reinforcement can lead to concrete failure when the expansion force exceeds the tensile strength that the concrete can withstand. Under these repeated loads, various parts of the structure will experience repeated stresses and strains, leading to fatigue failure below the static load strength. Existing technologies have some devices for coupling the environment and loads; however, because the test specimen deforms during loading, the contact area between the test specimen and the corrosion chamber changes, which affects the sealing effect of the corrosion chamber and impacts the test. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a concrete component environmental and load coupling test device, which can improve the sealing effect between the specimen and the corrosion chamber during the test and ensure the smooth progress of the test.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a concrete component environmental and load coupling test device, comprising a device body, an inner test chamber formed on the inner side of the device body, a support plate fixed on the inner side of the test chamber, an opening in the middle of the support plate, a rubber sealing plate fixed in the opening, a strip-shaped hole in the middle of the rubber sealing plate, a test specimen fixedly connected to the upper side of the rubber sealing plate by a locking member, the vertical projection of the test specimen being located within the rubber sealing plate, the test specimen sealing the strip-shaped hole, a fatigue loading assembly for loading the test specimen installed on the inner side of the device body, and a cylindrical water tank fixed on the upper side of the support plate, the cylindrical water tank surrounding the test specimen and the rubber sealing plate, a sealing piston plate slidably sealed at the upper opening of the cylindrical water tank, the sealing piston plate being connected to a hydraulic cylinder, the hydraulic cylinder being installed on the top inner side of the device body.

[0005] Furthermore, the locking component includes a connecting seat and a connecting plate. Several connecting seats and connecting plates are sequentially staggered along the circumference and are hinged to each other. One set of connecting plates is connected to a first joint, on which a screw is slidably passed. Another set of connecting plates adjacent to it is connected to a second joint, on which a threaded hole for connecting to the screw is opened. A support spring is sleeved on the outside of the screw, and the two ends of the support spring abut against the screw and the first joint, respectively. After passing through the rubber sealing plate, the locking component is used to press the test piece against the upper side of the rubber sealing plate.

[0006] Furthermore, a first pin is fixed on one of the connecting seats, and a second pin is fixed on the other connecting seat adjacent to it. Both the first and second pins extend along the longitudinal direction of the test piece. The first and second pins are made of elastic material. The first and second pins are used to provide relative elastic preload to the locking element and to provide elastic support to the bottom of the rubber sealing plate.

[0007] Furthermore, an airtight box is installed at the bottom of the support plate, and a weighing device is installed inside the airtight box. A water supply pipe is installed on the inner wall of the cylindrical water tank. The lower end of the water supply pipe extends into the inner side of the cylindrical water tank, and the upper end of the water supply pipe extends out from the main body of the device. The water supply pipe is connected to the water tank and is powered by an electric pump. The electric pump and the weighing device are also connected to a controller.

[0008] Furthermore, the fatigue loading assembly includes four sets of hydraulic servo actuators. Two sets of hydraulic servo actuators are located on the upper side of the test piece and installed on the top of the device body, and two sets of hydraulic servo actuators are located on the lower side of the test piece and installed on the bottom of the device body. The longitudinal distance between the two sets of hydraulic servo actuators on the upper side is smaller than the longitudinal distance between the two sets of hydraulic servo actuators on the lower side.

[0009] Furthermore, a sealing ring is installed between the test piece and the rubber sealing plate, with the sealing ring surrounding the outside of the strip hole.

[0010] Furthermore, an industrial camera is installed on the inner top of the device body. The device body includes an outer casing, an inner casing spaced apart inside the outer casing, and support pins between the outer casing and the inner casing for supporting the outer casing. An insulation layer is formed between the outer casing and the inner casing.

[0011] The beneficial effects of this invention are as follows: This invention discloses a concrete component environmental and load coupling test device. By covering the outside of the test specimen with a cylindrical water tank, the sealing effect of the cylindrical water tank will not be affected when the test specimen is deformed by the loading component. Using this device, the sealing effect between the test specimen and the corrosion chamber can be improved during the test, ensuring the smooth progress of the test.

[0012] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized through the following description. Attached Figure Description

[0013] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the structure of the device of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram showing the location of the slotted hole; Figure 4 This is a structural schematic diagram of the locking component; Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0014] The following components are labeled in the attached diagram: 1. Device body; 2. Test chamber; 3. Support plate; 4. Opening; 5. Rubber sealing plate; 6. Strip hole; 7. Locking component; 8. Test piece; 9. Columnar water tank; 10. Sealing piston plate; 11. Hydraulic cylinder; 12. Connecting seat; 13. Connecting plate; 14. First connector; 15. Screw; 16. Second connector; 17. Support spring; 18. First pin; 19. Second pin; 20. Airtight box; 21. Weighing device; 22. Water supply pipe; 23. Hydraulic servo actuator; 24. Sealing ring; 25. Industrial camera; 26. Outer casing; 27. Inner casing; 28. Support nail; 29. ​​Insulation layer. Detailed Implementation

[0015] like Figures 1-5 As shown, the present invention discloses a concrete component environmental and load coupling test device, including a device body 1, which is square and sealed inside. A test cavity 2 is formed on the inner side of the device body 1. A support plate 3 is fixed on the inner side of the test cavity 2. The support plate 3 is horizontally installed on the inner side of the test cavity 2 and is mainly used to support the test specimen 8.

[0016] The support plate 3 has an opening 4 in the middle, and a rubber sealing plate 5 is fixed in the opening 4. The rubber sealing plate 5 can be vulcanized and fixed in the opening 4. The rubber sealing plate 5 has a strip hole 6 in the middle, and the area of ​​the strip hole 6 is smaller than the area of ​​the test piece 8. The upper side of the rubber sealing plate 5 is fixedly connected to the test piece 8 by a locking member 7. The vertical projection of the test piece 8 is located in the rubber sealing plate 5. The liquid pressure in the device body 1 has little effect on the rubber sealing plate 5, and pressure changes will not have a significant effect on it.

[0017] Under the pressure fixing action of the locking member 7, the test piece 8 seals the strip hole 6. A fatigue loading component for loading the test piece 8 is installed on the inner side of the device body 1. The test piece 8 is loaded by applying force through the fatigue loading component. A cylindrical water tank 9 is fixed on the upper side of the support plate 3. The cylindrical water tank 9 surrounds the test piece 8 and the rubber sealing plate 5. A sealing piston plate 10 is slidably sealed at the upper opening of the cylindrical water tank 9. The sealing piston plate 10 is connected to the hydraulic cylinder 11. The hydraulic cylinder 11 is installed on the top inner side of the device body 1.

[0018] The device of the present invention covers the outside of the test specimen 8 with a cylindrical water tank 9. When the test specimen 8 is deformed by the loading component, it will not affect the sealing effect of the cylindrical water tank 9. By using the device of the present invention, the sealing effect between the test specimen and the corrosion chamber can be improved during the test, ensuring the smooth progress of the test.

[0019] In this embodiment, the locking member 7 includes a connecting seat 12 and a connecting plate 13. A plurality of connecting seats 12 and connecting plates 13 are sequentially staggered along the circumferential direction. The connecting seats 12 and connecting plates 13 are hinged to each other. One set of connecting plates 13 is connected to a first connector 14. A screw 15 is slidably passed through the first connector 14. Another set of connecting plates 13 adjacent to it is connected to a second connector 16. When the distance between the first connector 14 and the second connector 16 is reduced, the entire locking member 7 can be tightened inward.

[0020] The connection between the first connector 14 and the second connector 16 is as follows: the second connector 16 has a threaded hole for connecting to the screw 15; a support spring 17 is sleeved on the outside of the screw 15; the two ends of the support spring 17 abut against the screw 15 and the first connector 14 respectively; the locking member 7 passes through the rubber sealing plate 5 and is used to press the test piece 8 against the upper side of the rubber sealing plate 5; the support spring 17 is used to provide the first connector 14 with a direction toward the second connector 16.

[0021] In this embodiment, a first pin 18 is fixed on one of the connecting seats 12, and a second pin 19 is fixed on the other connecting seat 12 adjacent to it. Both the first pin 18 and the second pin 19 extend along the longitudinal direction of the test piece 8. The first pin 18 and the second pin 19 are made of elastic material. The first pin 18 and the second pin 19 are used to provide relative elastic pretension to the locking member 7. The first pin 18 and the second pin 19 are used to provide elastic support to the bottom of the rubber sealing plate 5, which can achieve longitudinal support and further increase the sealing performance between the rubber sealing plate 5 and the test piece 8.

[0022] In this embodiment, an airtight box 20 is provided at the bottom of the support plate 3. A weighing device 21 is installed inside the airtight box 20. A water supply pipe 22 is installed on the inner wall of the cylindrical water tank 9. The lower end of the water supply pipe 22 extends into the inner side of the cylindrical water tank 9, and the upper end extends from the device body 1. The water supply pipe 22 is connected to the water tank and powered by an electric pump. The electric pump and the weighing device 21 are simultaneously connected to a controller. When cracks appear in the test piece 8 during loading, the corrosive liquid in the cylindrical water tank 9 can flow out through the cracks. The weighing device 21 can weigh the lost water, and then the water supply pipe 22 can simultaneously replenish it, reducing fluctuations in water pressure. The cylindrical water tank 9 of this invention is made of transparent material, allowing observation of the air bubbles inside the cylindrical water tank 9, facilitating observation of the deformation location of the cracks.

[0023] In this embodiment, the fatigue loading assembly includes four sets of hydraulic servo actuators 23. Two sets of hydraulic servo actuators 23 are located on the upper side of the test piece 8 and installed on the top of the device body 1. Two sets of hydraulic servo actuators 23 are located on the lower side of the test piece 8 and installed on the bottom of the device body 1. The longitudinal distance between the two sets of hydraulic servo actuators 23 on the upper side is smaller than the longitudinal distance between the two sets of hydraulic servo actuators 23 on the lower side.

[0024] In this embodiment, a sealing ring 24 is also installed between the test piece 8 and the rubber sealing plate 5. The sealing ring 24 surrounds the outside of the strip hole 6, which can further achieve sealing.

[0025] In this embodiment, an industrial camera 25 is installed on the top inner side of the device body 1, which can monitor the condition of the cracks. The device body 1 includes an outer casing 26, an inner casing 27 spaced inside the outer casing 26, and support pins 28 disposed between the outer casing 26 and the inner casing 27 to support the outer casing 26. An insulation layer 29 is formed between the outer casing 26 and the inner casing 27 to increase the insulation performance of the device and meet the needs of the test.

[0026] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A test apparatus for environmental and load coupling of concrete components, characterized in that: The device includes a main body, with a test chamber formed inside the main body. A support plate is fixed inside the test chamber, and an opening is formed in the middle of the support plate. A rubber sealing plate is fixed inside the opening, and a strip-shaped hole is formed in the middle of the rubber sealing plate. A test specimen is fixedly connected to the upper side of the rubber sealing plate by a locking device. The vertical projection of the test specimen is located inside the rubber sealing plate, and the test specimen seals the strip-shaped hole. A fatigue loading assembly for loading the test specimen is installed inside the main body. A cylindrical water tank is fixed to the upper side of the support plate, and the cylindrical water tank surrounds the test specimen and the rubber sealing plate. A sealing piston plate is slidably sealed at the upper opening of the cylindrical water tank. The sealing piston plate is connected to a hydraulic cylinder, which is installed on the top inner side of the main body.

2. The environmental and load coupling test device for concrete components according to claim 1, characterized in that: The locking component includes a connecting seat and a connecting plate. Several connecting seats and connecting plates are sequentially staggered along the circumference and are hinged to each other. One set of connecting plates is connected to a first joint, on which a screw is slidably inserted. Another set of connecting plates adjacent to it is connected to a second joint, on which a threaded hole for connecting to the screw is opened. A support spring is sleeved on the outside of the screw, and the two ends of the support spring abut against the screw and the first joint, respectively. After passing through the rubber sealing plate, the locking component is used to press the test piece against the upper side of the rubber sealing plate.

3. The environmental and load coupling test device for concrete components according to claim 2, characterized in that: A first pin is fixed on one of the connecting seats, and a second pin is fixed on the adjacent connecting seat. Both the first and second pins extend along the longitudinal direction of the test piece. The first and second pins are made of elastic material. The first and second pins are used to provide relative elastic preload to the locking element and to provide elastic support to the bottom of the rubber sealing plate.

4. The environmental and load coupling test device for concrete components according to claim 1, characterized in that: An airtight box is installed at the bottom of the support plate. A weighing device is installed inside the airtight box. A water supply pipe is installed on the inner wall of the cylindrical water tank. The lower end of the water supply pipe extends into the inner side of the cylindrical water tank, and the upper end of the water supply pipe extends out from the main body of the device. The water supply pipe is connected to the water tank and is powered by an electric pump. The electric pump and the weighing device are also connected to a controller.

5. The environmental and load coupling test device for concrete components according to claim 1, characterized in that: The fatigue loading assembly includes four sets of hydraulic servo actuators. Two sets of hydraulic servo actuators are located on the upper side of the test piece and installed on the top of the device body. Two sets of hydraulic servo actuators are located on the lower side of the test piece and installed on the bottom of the device body. The longitudinal distance between the two sets of hydraulic servo actuators on the upper side is smaller than the longitudinal distance between the two sets of hydraulic servo actuators on the lower side.

6. The environmental and load coupling test device for concrete components according to claim 1, characterized in that: A sealing ring is also installed between the test piece and the rubber sealing plate, and the sealing ring surrounds the outside of the strip hole.

7. The environmental and load coupling test device for concrete components according to claim 1, characterized in that: An industrial camera is installed on the top inner side of the device body. The device body includes an outer casing, an inner casing spaced apart inside the outer casing, and support pins between the outer casing and the inner casing for supporting the outer casing. An insulation layer is formed between the outer casing and the inner casing.

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