Testing device for testing anti-explosion performance of concrete column in axial pressure state

Abstract

The invention relates to the technical field of anti-knock performance tests of concrete buildings, in particular to a test device for testing anti-knock performance of a concrete column in an axial pressure state. The device comprises a test frame, the frame is composed of concrete stand columns and cross beams, one cross beam is provided with a base, and a concrete column sample is installed on the base; a pressurization testing device for applying axial pressure to the concrete column sample is also arranged on the frame. According to the testing device, axial pressure is applied to the concrete column sample through the jack so as to simulate the actual stress state of a concrete structure. Under the synergistic effect of the pressure applying locking mechanism and the detection element, after the jack applies preset pressure, the concrete column sample can be kept in a constant pressure state, and meanwhile the jack is separated from the top of the sample. According to the design, in the subsequent explosion test process, effective testing of the concrete column sample can be ensured, effective protection can be provided for the output end of the jack, and direct action of explosion shock waves on the output end of the jack is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-explosion performance tests for concrete buildings, and specifically to a test device for testing the anti-explosion performance of concrete columns under axial compression. Background Art

[0002] During the anti-explosion performance test of concrete buildings, the stress conditions and failure modes of concrete buildings under explosion loads can be obtained, providing a basis for the optimization of structural design. For example, the composition, density, and strength of concrete can be adjusted, or the structural design can be improved, such as setting explosion-proof walls and increasing deformation capacity, to improve its anti-explosion performance;

[0003] Currently, the test research on the anti-explosion performance of concrete buildings mainly relies on the research method of conducting anti-explosion tests on concrete columns. However, under conventional test conditions, there are significant differences between the stress states of concrete columns and the actual engineering environment, resulting in the test results being difficult to accurately reflect the structural responses under real working conditions. To solve this problem, the present invention proposes a test device for testing the anti-explosion performance of concrete columns under axial compression. Summary of the Invention

[0004] The purpose of the present invention is to provide a test device for testing the anti-explosion performance of concrete columns under axial compression to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A test device for testing the anti-explosion performance of concrete columns under axial compression, including a frame for the test, the frame is composed of concrete columns and crossbeams, a base is installed on one of the crossbeams, and a concrete column specimen is installed on the base, a pressurizing test device for pressurizing the concrete column specimen is installed on the frame, and an explosive is provided on one side of the concrete column specimen close to the inside of the frame;

[0006] A detection and recording device is provided on the outside of the frame, and the detection and recording device is used to detect and record the state of the concrete column specimen during the test.

[0007] Among them, the pressurizing test device includes a pushing mechanism, a pushing shell, a detection member, a pressure application locking mechanism, and a connecting member. The pushing mechanism is located above the concrete column specimen, and the pushing mechanism is fixedly connected to the corresponding crossbeam. The output end of the pushing mechanism contacts the pushing shell, and the detection member is installed on the pushing shell;

[0008] There are two pressure application locking mechanisms. The two pressure application locking mechanisms are arranged at both ends of the pushing shell, and the concrete columns corresponding to the pressure application locking mechanisms are composed of a reinforcing plate and a concrete pillar, and the pressure application locking mechanism is connected to the reinforcing plate;

[0009] The connecting piece is installed at the bottom of the pushing shell, and the connecting piece is connected to the concrete column.

[0010] Among them, the jacking mechanism includes a jack, a pressure-applying shell and a locking driving part. The jack is fixedly connected to the cross beam, and the output end of the jack is fixedly connected to the pressure-applying shell. The locking driving part is installed on the pressure-applying shell.

[0011] Among them, the locking driving part includes an electric push rod, a pushing plate, a connecting column, a pushing block and a pushing rack. The electric push rod is fixedly installed on the top of the pressure-applying shell, and the output end of the electric push rod passes through the top of the pressure-applying shell and is fixedly connected to the pushing plate. The output end of the electric push rod is slidably connected to the pressure-applying shell;

[0012] There are two connecting columns. The two connecting columns are fixedly installed at the bottom of the pushing plate, and the bottoms of the two connecting plates are both fixedly connected to the pushing block. There are two pushing racks. The two pushing racks are located outside the pushing block, and the pushing racks are fixedly connected to the pushing plate. Openings are provided at the bottom of the pressure-applying shell corresponding to the positions of the corresponding pushing block and the two pushing racks, and access ports are provided at the top of the pushing shell corresponding to the positions of the corresponding pushing block and the two pushing racks. By means of the provided locking driving part, the function of driving the pressure-applying locking mechanism is realized.

[0013] Among them, the detecting part includes pressure sensors. There are two pressure sensors. The two pressure sensors are both fixedly installed on the top of the pushing shell. By means of the provided detecting part, the function of detecting the pressure applied to the concrete column specimen is realized.

[0014] Among them, the pressure-applying locking mechanism is composed of a fixed block, a positioning sleeve, a positioning shell, a contact positioning part and a locking part. The fixed block is installed and fixed inside the pushing shell. The positioning sleeve passes through the fixed block and is fixedly connected to it, and at the same time passes through the pushing shell. The reinforcing plate is provided with a moving port corresponding to the position of the positioning sleeve. One end of the positioning sleeve passes through the moving port and is fixedly connected to the positioning shell. The contact positioning part is arranged between the positioning shell and the positioning sleeve, and the locking part is installed outside the positioning sleeve. By means of the provided pressure-applying locking mechanism, the function of enabling the concrete column specimen to continuously maintain a constant pressure state after a predetermined pressure is applied to it is realized.

[0015] Among them, the contact positioning part includes a contact block, an extension rod, a connecting plate, a connecting spring and a locking plate. The contact block is located inside the pushing shell, and a contact inclined surface is provided on one side of the contact block close to the pushing block. One side of the contact block is fixedly connected to the extension rod, and one end of the extension rod passes through the positioning sleeve and is located inside the positioning shell. The connecting spring is fixedly installed inside the positioning shell, and the other end of the connecting spring is fixedly connected to the extension rod;

[0016] The connecting plate is fixedly sleeved on the outside of the extension rod. There are two locking plates, and one end of each of the two locking rods is fixedly connected to the connecting plate. The positioning shell is provided with limiting openings corresponding to the positions of the two locking plates, and the locking plates slide through the limiting openings. By providing a contact positioning member, the further positioning of the pushing shell and the reinforcing plate is realized.

[0017] Among them, the locking member includes an external thread sleeve, a rotating gear, a U-shaped plate and a secondary locking member. The external thread sleeve is rotatably sleeved on the outside of the positioning sleeve. The rotating gear is located inside the pushing shell, and the rotating gear is fixedly sleeved on the outside of the external thread sleeve. The rotating gear is meshed with the pushing rack.

[0018] One end of the U-shaped plate is threadedly sleeved on the outside of the external thread sleeve, and one side of the U-shaped plate is slidably sleeved on the outside of the reinforcing plate. There are two secondary locking members, and the two secondary locking members are respectively installed on both sides of one end of the U-shaped plate. The reinforcing plate is equidistantly provided with a plurality of locking holes corresponding to the positions of the secondary locking members. By providing the locking member, the locking between the pushing shell and the reinforcing plate is realized.

[0019] Among them, the connecting member includes a compression spring, a connecting ear, a connecting rod, a bottom plate and a limiting frame. There are a plurality of compression springs, and the plurality of compression springs are equidistantly arranged at the bottom of the pushing shell. The plurality of compression springs are all fixedly installed on the bottom plate. The limiting frame is fixedly installed at the bottom of the bottom plate, and the limiting frame is sleeved on the outside of the top end of the concrete column specimen. There are a plurality of connecting rods, and the plurality of connecting rods are all fixedly installed on the bottom plate. The connecting ear is slidably sleeved on the outside of the connecting rod, and the connecting ear is fixedly connected to the pushing shell. By providing the connecting member, the connection between the pushing shell and the concrete column specimen is realized.

[0020] Among them, the detection and recording device includes a fixing frame, a guide rail, an air free-field pressure sensor, an inclined frame, a protection plate and a high-speed camera. The fixing frame is fixedly installed on one side of the frame, and the guide rail is arranged on the fixing frame. The air free-field pressure sensor is arranged on the guide rail;

[0021] The inclined frame is fixedly installed on the other side of the frame, and the protection plate is installed on the inclined frame. The high-speed camera is arranged on the side of the protection plate away from the frame. By providing the detection and recording device, the influence of static load and dynamic load on concrete can be considered simultaneously, so that the test result is closer to the actual situation.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. The present invention applies axial pressure to the concrete column specimen through a jack to simulate the stress state of the concrete structure under actual working conditions. Under the coordinated action of the pressure application and locking mechanism and the detection element, after the jack applies a predetermined pressure, the concrete column specimen can be maintained in a constant pressure state, and at the same time, the separation between the jack and the top of the specimen can be achieved. This design can not only effectively carry out the anti-explosion performance test of the concrete column specimen during the subsequent explosion test, but also provide reliable protection for the output end of the jack to avoid its direct exposure to the explosion shock wave.

[0024] 2. The present invention conducts anti-explosion tests on concrete under axial compression, and can simultaneously consider the effects of static load and dynamic load on concrete, thereby making the test results closer to the actual situation. Brief Description of the Drawings

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a side view of the overall structure of the present invention;

[0027] Figure 3 is a front view schematic diagram of the concrete column specimen of the present invention;

[0028] Figure 4 is a schematic diagram of the pressure application shell structure of the present invention;

[0029] Figure 5 is a schematic diagram of the position state of the explosive of the present invention;

[0030] Figure 6 is a top view schematic diagram of the pressure application shell of the present invention;

[0031] Figure 7 is a schematic diagram of the bottom plate structure of the present invention;

[0032] Figure 8 of the present invention Figure 7 is an enlarged schematic diagram of area A;

[0033] Figure 9 is a schematic diagram of the pushing block structure of the present invention;

[0034] Figure 10 is a schematic diagram of the U-shaped plate structure of the present invention;

[0035] Figure 11 is a side view sectional schematic diagram of the positioning shell of the present invention.

[0036] In the figure: 1 - Frame; 11 - Concrete column; 111 - Reinforcing plate; 1111 - Moving opening; 112 - Concrete pillar; 12 - Cross beam; 121 - Base; 2 - Concrete column specimen; 3 - Pressurized testing device; 31 - Jacking mechanism; 311 - Jack; 312 - Pressing shell; 32 - Pushing shell; 4 - Detection and recording device; 41 - Fixing frame; 42 - Guide rail; 43 - Free - field air pressure sensor; 44 - Inclined frame; 45 - Protective plate; 46 - High - speed camera; 5 - Test piece; 51 - Pressure sensor; 6 - Pressing and locking mechanism; 61 - Fixed block; 62 - Positioning sleeve; 63 - Positioning shell; 631 - Limiting opening; 64 - Contact positioning part; 641 - Contact block; 642 - Extension rod; 643 - Connecting plate; 644 - Connecting spring; 645 - Locking plate; 65 - Locking part; 651 - External thread sleeve; 652 - Rotating gear; 653 - U - shaped plate; 6531 - Magnet; 7 - Connecting part; 71 - Extrusion spring; 72 - Connecting ear; 73 - Connecting rod; 74 - Base plate; 75 - Limiting frame; 8 - Locking driving part; 81 - Electric push rod; 82 - Pushing plate; 83 - Connecting column; 84 - Pushing block; 85 - Pushing rack; 9 - Secondary locking part; 91 - Locking rod; 92 - Baffle plate; 93 - Positioning spring; 10 - Explosive. Specific implementation mode

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] Embodiment 1

[0039] Please refer to Figures 1 to 4 , a test device for testing the anti - explosion performance of a concrete column under axial compression, including a test frame 1. The frame 1 is composed of concrete columns 11 and cross beams 12. That is, there are multiple concrete columns 11 and multiple cross beams 12. The multiple cross beams 12 are used to connect the four concrete columns 11. At the same time, the multiple cross beams 12 are arranged at the bottom and top of the concrete columns 11, thereby ensuring the stability of the connection between the four concrete columns 11. A base 121 is installed on one of the cross beams 12, and a concrete column specimen 2 is installed on the base 121. A pressurized testing device 3 for pressurizing the concrete column specimen 2 is installed on the frame 1, and an explosive 10 is provided on the side of the concrete column specimen 2 close to the inside of the frame 1;

[0040] A detection and recording device 4 is provided outside the frame 1, and the detection and recording device 4 is used to detect and record the state of the concrete column specimen 2 during the test.

[0041] Please refer to Figures 3 to 11 As shown in Figures 3 to 11 , the pressure testing device 3 includes a pushing mechanism 31, a pushing shell 32, a detecting member 5, a pressure applying and locking mechanism 6, and a connecting member 7. The pushing mechanism 31 is located above the concrete column specimen 2, and the pushing mechanism 31 is fixedly connected to the corresponding cross beam 12. The output end of the pushing mechanism 31 contacts the pushing shell 32, and the detecting member 5 is installed on the pushing shell 32;

[0042] There are two pressure applying and locking mechanisms 6, which are arranged at both ends of the pushing shell 32. The concrete column 11 corresponding to the pressure applying and locking mechanism 6 is composed of a reinforcing plate 111 and a concrete pillar 112. In this embodiment, the reinforcing plate 111 is made of materials such as stainless steel, cobalt-chromium alloy, or titanium alloy, which has a high-strength supporting force. At the same time, the reinforcing plate 111 is non-magnetic, and the pressure applying and locking mechanism 6 is connected to the reinforcing plate 111;

[0043] The connecting member 7 is installed at the bottom of the pushing shell 32, and the connecting member 7 is connected to the concrete column 11;

[0044] The pushing mechanism 31 includes a jack 311, a pressure applying shell 312, and a locking driving member 8. The jack 311 is fixedly connected to the cross beam 12. In this embodiment, a protective steel plate is correspondingly arranged at the cross beam 12 outside the jack 311 for protecting the jack 311. The output end of the jack 311 is fixedly connected to the pressure applying shell 312, and the locking driving member 8 is installed on the pressure applying shell 312;

[0045] The locking driving member 8 includes an electric push rod 81, a pushing plate 82, a connecting column 83, a pushing block 84, and a pushing rack 85. The electric push rod 81 is fixedly installed on the top of the pressure applying shell 312, and the output end of the electric push rod 81 passes through the top of the pressure applying shell 312 and is fixedly connected to the pushing plate 82. The output end of the electric push rod 81 is slidably connected to the pressure applying shell 312;

[0046] There are two connecting columns 83, which are fixedly installed at the bottom of the pushing plate 82, and both bottoms of the two connecting plates 643 are fixedly connected to the pushing block 84. There are two pushing racks 85, which are located outside the pushing block 84, and the pushing racks 85 are fixedly connected to the pushing plate 82. Openings are provided at the bottom of the pressure applying shell 312 corresponding to the positions of the corresponding pushing block 84 and the two pushing racks 85, and inlet openings are provided at the top of the pushing shell 32 corresponding to the positions of the corresponding pushing block 84 and the two pushing racks 85.

[0047] The detecting member 5 includes pressure sensors 51. There are two pressure sensors 51, and both two pressure sensors 51 are fixedly installed on the top of the pushing shell 32.

[0048] Please refer to Figures 5 to 9, the pressure application and locking mechanism 6 includes a fixed block 61, a positioning sleeve 62, a positioning housing 63, a contact positioning member 64 and a locking member 65. The fixed block 61 is fixedly installed inside the pushing housing 32. The positioning sleeve 62 passes through the fixed block 61 and is fixedly connected to the fixed block 61. The positioning sleeve 62 passes through the pushing housing 32. At the position corresponding to the positioning sleeve 62 on the reinforcing plate 111, there is a moving opening 1111. One end of the positioning sleeve 62 passes through the moving opening 1111 and is fixedly connected to the positioning housing 63. The contact positioning member 64 is installed between the positioning housing 63 and the positioning sleeve 62, and the locking member 65 is installed outside the positioning sleeve 62.

[0049] The contact positioning member 64 includes a contact block 641, an extension rod 642, a connecting plate 643, a connecting spring 644 and a locking plate 645. The contact block 641 is located inside the pushing housing 32, and a contact inclined surface is provided on the side of the contact block 641 close to the pushing block 84. One side of the contact block 641 is fixedly connected to the extension rod 642, and one end of the extension rod 642 passes through the positioning sleeve 62 and is located inside the positioning housing 63. The connecting spring 644 is fixedly installed inside the positioning housing 63, and the other end of the connecting spring 644 is fixedly connected to the extension rod 642;

[0050] The connecting plate 643 is fixedly sleeved outside the extension rod 642. There are two locking plates 645. One end of each of the two locking rods 91 is fixedly connected to the connecting plate 643. At the position corresponding to the two locking plates 645 on the positioning housing 63, there are limiting openings 631, and the locking plates 645 slide through the limiting openings 631.

[0051] Please refer to Figures 7 to 11 , the locking member 65 includes an external thread sleeve 651, a rotating gear 652, a U-shaped plate 653 and a secondary locking member 9. The external thread sleeve 651 is rotatably sleeved outside the positioning sleeve 62. The rotating gear 652 is located inside the pushing housing 32 and is fixedly sleeved outside the external thread sleeve 651. The rotating gear 652 is meshed with the pushing rack 85;

[0052] One end of the U-shaped plate 653 is threadedly sleeved outside the external thread sleeve 651, and one side of the U-shaped plate is slidably sleeved outside the reinforcing plate 111. There are two secondary locking members 9, and the two secondary locking members 9 are respectively installed on both sides of one end of the U-shaped plate 653. At the position corresponding to the secondary locking members 9 on the reinforcing plate 111, a plurality of locking holes are equidistantly provided;

[0053] Specific implementation process: Before testing the concrete column specimen 2, the jack 311 operates, and the pressure application shell 312 is located on the pushing shell 32. At the same time, the bottom of the pressure application shell 312 contacts the two pressure sensors 51. The pressure sensors 51 measure the axial compression magnitude. As the jack 311 continues to operate, the pressure application shell 312 further pushes the connecting member 7 to move through the pushing shell 32. While the connecting member 7 moves downward, axial compression is further applied to the concrete column specimen 2 to simulate the actual stress condition of the concrete until the jack 311 is pressurized to a certain intensity;

[0054] Subsequently, the electric push rod 81 operates, so that the pushing plate 82 drives the pushing block 84 and the two pushing racks 85 to move upward from inside the pushing shell 32. During the upward movement of the pushing block 84, the contact block 641 moves along the center of the inside of the pushing shell 32 under the reverse elastic force of the connecting spring 644. While the contact block 641 moves, the locking plate 645 is driven to move along the direction of the reinforcing plate 111 through the extension rod 642 and the connecting plate 643 until the pushing block 84 completely disengages from the two contact blocks 641, and then the two groups of locking plates 645 are respectively in contact with and locked to the outside of the reinforcing plate 111;

[0055] At the same time, when the pushing plate 82 drives the two pushing racks 85 to move upward, the pushing racks 85 synchronously drive the rotating gear 652 to rotate. While the rotating gear 652 rotates, the external thread sleeve 651 rotates relative to the positioning sleeve 62. While the external thread sleeve 651 rotates, driving force is further provided to the U-shaped plate 653. Due to the limiting effect of the reinforcing plate 111, the U-shaped plate 653 moves along the direction of the reinforcing plate 111 until the pushing rack 85 completely disengages from the rotating gear 652, and then one side of the U-shaped plate 653 comes into contact with and locks to the reinforcing plate 111 again. Thus, after the pushing shell 32 is pressurized downward and moves downward a certain position through the jack 311 and the pressure application shell 312, the pushing shell 32 is locked and positioned at the downward position, and at the same time, the concrete column specimen 2 continues to maintain this pressure. Subsequently, the jack 311 drives the pressure application shell 312 to disengage from the pushing shell 32;

[0056] At this time, the explosive 10 is detonated, and detection and recording are carried out by the detection and recording device 4.

[0057] Please refer to Figures 4 to 7, the connecting member 7 includes a compression spring 71, a connecting ear 72, a connecting rod 73, a bottom plate 74 and a limiting frame 75. There are multiple compression springs 71, and the multiple compression springs 71 are arranged at equal intervals at the bottom of the pushing shell 32. The multiple compression springs 71 are all fixedly installed on the bottom plate 74. The limiting frame 75 is fixedly installed at the bottom of the bottom plate 74, and the limiting frame 75 is sleeved on the outside of the top end of the concrete column specimen 2. There are multiple connecting rods 73, and the multiple connecting rods 73 are all fixedly installed on the bottom plate 74. The connecting ear 72 is slidably sleeved on the outside of the connecting rod 73, and the connecting ear 72 is fixedly connected to the pushing shell 32;

[0058] Specifically: When the pushing shell 32 is pressured along with the jack 311 at the top of the pressure-applying shell 312, the pushing shell 32 drives the compression spring 71 to be compressed. When the compression spring 71 is compressed, a reverse elastic force is generated, and then the concrete column specimen 2 is axially pressured through the bottom plate 74 and the limiting frame 75, so as to achieve the effect of simulating the actual stress condition of the concrete.

[0059] The detection and recording device 4 includes a fixing frame 41, a guide rail 42, an air free-field pressure sensor 43, an inclined frame 44, a protection plate 45 and a high-speed camera 46. The fixing frame 41 is fixedly installed on one side of the frame 1, and the guide rail 42 is arranged on the fixing frame 41. The air free-field pressure sensor 43 is arranged on the guide rail 42;

[0060] In this embodiment, there are two guide rails 42. Sensor brackets are installed on both of the two guide rails 42, and the air free-field pressure sensor 43 is detachably installed on the sensor bracket;

[0061] Please refer to Figures 1 to 2 , the inclined frame 44 is fixedly installed on the other side of the frame 1, and the protection plate 45 is installed on the inclined frame 44. The high-speed camera 46 is arranged on the side of the protection plate 45 away from the frame 1. The inclined frame 44 ensures that its angle enables the high-speed camera 46 to fully capture the state of the concrete column specimen 2 during the explosion process. At the same time, a transparent acrylic plate is provided at the position of the protection plate 45 where the high-speed camera 46 is located, so as to ensure that the high-speed camera 46 can fully capture the explosion process.

[0062] Embodiment 2

[0063] Please refer to Figures 7 to 8 , Embodiment 2 is a further supplementary description of Embodiment 1. Specifically: The locking plate 645 is made of iron material, and grooves are respectively provided at both ends of the side of the U-shaped plate 653 close to the locking plate 645, and magnets 6531 are installed inside the grooves;

[0064] Further, when the two locking plates 645 are respectively close to one end of the U-shaped plate 653, the two locking plates 645 are magnetically connected to the magnet 6531, thereby further enhancing the stability of the abutment between the locking plate 645 and the reinforcing plate 111.

[0065] Embodiment III

[0066] Please refer to Figure 10 , Embodiment III is a further supplementary description of the secondary locking member 9 in Embodiment I. Specifically, the secondary locking member 9 includes a locking rod 91, a baffle 92, and a positioning spring 93. There are multiple locking rods 91. The multiple locking rods 91 slide through one side of the U-shaped plate 653, and one end of the locking rod 91 located outside the U-shaped plate 653 is fixedly connected to the baffle 92. The other end of the locking rod 91 is clamped at the locking hole. The positioning spring 93 is sleeved outside the locking rod 91, and both ends of the positioning spring 93 are fixedly connected to the baffle 92 and the U-shaped plate 653 respectively;

[0067] Thus, further, when the U-shaped plate 653 moves along the reinforcing plate 111, the multiple locking rods 91 respectively move to the locking holes correspondingly. Under the reverse elastic force of the positioning spring 93, one end of the locking rod 91 is inserted into the locking hole, thereby further positioning the U-shaped plate 653.

[0068] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0069] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for testing the explosion resistance of a concrete column under axial compression, comprising a test frame (1), characterized in that: The frame (1) is composed of a concrete column (11) and a crossbeam (12), wherein a base (121) is installed on one of the crossbeams (12), and a concrete column sample (2) is installed on the base (121); a pressure test device (3) for pressurizing the concrete column sample (2) is installed on the frame (1), and an explosive (10) is provided on a side of the concrete column sample (2) close to the inside of the frame (1); A detection and recording device (4) is provided on the outer side of the frame (1), and the detection and recording device (4) is used to detect and record the state of the concrete column sample (2) during the test.

2. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 1, characterized in that: The pressurized test device (3) comprises a pushing mechanism (31), a pushing shell (32), a detection member (5), a pressure locking mechanism (6) and a connecting member (7), wherein the pushing mechanism (31) is located above the concrete column specimen (2), and the pushing mechanism (31) is fixedly connected to the corresponding crossbeam (12), the output end of the pushing mechanism (31) is in contact with the pushing shell (32), and the detection member (5) is mounted on the pushing shell (32); Two pressure-applying locking mechanisms (6) are provided, and the two pressure-applying locking mechanisms (6) are arranged at two ends of the push shell (32), and the concrete column (11) corresponding to the pressure-applying locking mechanism (6) is composed of a reinforcement plate (111) and a concrete support column (112), and the pressure-applying locking mechanism (6) is connected to the reinforcement plate (111); The connecting member (7) is installed at the bottom of the propulsion shell (32), and the connecting member (7) is connected to the concrete column (11).

3. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 2, characterized in that: The pushing mechanism (31) comprises a jack (311), a pressure shell (312) and a locking drive member (8); the jack (311) is fixedly connected to the crossbeam (12), and an output end of the jack (311) is fixedly connected to the pressure shell (312); and the locking drive member (8) is mounted on the pressure shell (312).

4. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 3, characterized in that: The locking drive member (8) comprises an electric push rod (81), a push plate (82), a connecting column (83), a push block (84) and a push rack (85); the electric push rod (81) is fixedly mounted on the top of the pressure shell (312); an output end of the electric push rod (81) passes through the top of the pressure shell (312) and is fixedly connected to the push plate (82); and the output end of the electric push rod (81) is slidably connected to the pressure shell (312); There are two connecting columns (83), the two connecting columns (83) are fixedly mounted on the bottom of the push plate (82), and the bottoms of the two connecting plates (643) are fixedly connected to the push block (84), there are two pushing racks (85), the two pushing racks (85) are located outside the push block (84), and the pushing racks (85) are fixedly connected to the push plate (82), the bottom of the pressure shell (312) and the positions corresponding to the push block (84) and the two pushing racks (85) are both provided with openings, and the top of the push shell (32) and the positions corresponding to the push block (84) and the two pushing racks (85) are both provided with entry openings.

5. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 2, characterized in that: The detection component (5) comprises a pressure sensor (51), two of the pressure sensors (51) are provided, and the two pressure sensors (51) are both fixedly mounted on the top of the push shell (32).

6. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 2, characterized in that: The pressure locking mechanism (6) comprises a fixed block (61), a positioning sleeve (62), a positioning shell (63), a contact positioning piece (64) and a locking piece (65); the fixed block (61) is fixedly mounted inside the pushing shell (32); the positioning sleeve (62) passes through the fixed block (61), and the positioning sleeve (62) is fixedly connected to the fixed block (61); the positioning sleeve (62) passes through the pushing shell (32); a moving opening (1111) is provided on the reinforcing plate (111) at a position corresponding to the positioning sleeve (62); one end of the positioning sleeve (62) passes through the moving opening (1111) and is fixedly connected to the positioning shell (63); the contact positioning piece (64) is mounted between the positioning shell (63) and the positioning sleeve (62); and the locking piece (65) is mounted on the outside of the positioning sleeve (62).

7. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 6, characterized in that: The contact positioning member (64) comprises a contact block (641), an extension rod (642), a connecting plate (643), a connecting spring (644) and a locking plate (645); the contact block (641) is located inside the push shell (32); a contact inclined surface is provided on a side of the contact block (641) close to the push block (84); one side of the contact block (641) is fixedly connected to the extension rod (642); one end of the extension rod (642) passes through the positioning sleeve (62) and is located inside the positioning shell (63); the connecting spring (644) is fixedly installed inside the positioning shell (63); and the other end of the connecting spring (644) is fixedly connected to the extension rod (642); The connecting plate (643) is fixedly sleeved on the outside of the extension rod (642), two locking plates (645) are provided, one end of the two locking rods (91) are fixedly connected to the connecting plate (643), and a limiting opening (631) is provided on the positioning shell (63) at positions corresponding to the two locking plates (645), and the locking plate (645) slides through the limiting opening (631).

8. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 6, characterized in that: The locking member (65) comprises an externally threaded sleeve (651), a rotating gear (652), a U-shaped plate (653) and a secondary locking member (9); the externally threaded sleeve (651) is rotatably sleeved on the outside of the positioning sleeve (62); the rotating gear (652) is located inside the pushing shell (32) and is fixedly sleeved on the outside of the externally threaded sleeve (651); and the rotating gear (652) is meshingly connected with the pushing rack (85); One end of the U-shaped plate (653) is threadedly sleeved on the outside of the external threaded sleeve (651), and one side of the U-shaped plate is slidably sleeved on the outside of the reinforcing plate (111). Two secondary locking members (9) are provided, and the two secondary locking members (9) are respectively installed on both sides of one end of the U-shaped plate (653). The reinforcing plate (111) is provided with a plurality of locking holes at equal distances corresponding to the positions of the secondary locking members (9).

9. A test device for testing the explosion resistance of concrete columns under axial compression according to claim 2, characterized in that: The connecting member (7) comprises a compression spring (71), a connecting ear (72), a connecting rod (73), a bottom plate (74) and a limit frame (75). A plurality of the compression springs (71) are provided, and the plurality of the compression springs (71) are arranged at equal distances on the bottom of the push shell (32). The plurality of the compression springs (71) are fixedly mounted on the bottom of the bottom plate (74). The limit frame (75) is fixedly mounted on the bottom of the bottom plate (74), and the limit frame (75) is sleeved on the outside of the top end of the concrete column specimen (2). A plurality of the connecting rods (73) are provided, and the plurality of the connecting rods (73) are fixedly mounted on the bottom plate (74). The connecting ear (72) is slidably sleeved on the outside of the connecting rod (73), and the connecting ear (72) is fixedly connected to the push shell (32).

10. The test device for testing the explosion resistance of concrete columns under axial compression according to claim 1, characterized in that: The detection and recording device (4) comprises a fixing frame (41), a guide rail (42), an air free field pressure sensor (43), an inclined frame (44), a protective plate (45) and a high-speed camera (46); the fixing frame (41) is fixedly mounted on one side of the frame (1), the guide rail (42) is arranged on the fixing frame (41), and the air free field pressure sensor (43) is arranged on the guide rail (42); The inclined frame (44) is fixedly mounted on the other side of the frame (1), and the protective plate (45) is mounted on the inclined frame (44), and the high-speed camera (46) is arranged on a side of the protective plate (45) away from the frame (1).

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