A kind of shear strength testing device for building structural engineering steel beam

Abstract

The application discloses a kind of steel beam shear strength testing devices for building structure engineering, it is related to shear strength test technical field, to solve the technical problem of low functionality of steel beam shear strength testing devices for building structure engineering, including testing machine body, lifting slide unit, fixed mechanism, mounting seat B, testing mechanism and transmission mechanism.The application is designed by testing mechanism structure, when plug-in assembly is plugged with mounting seat B, it can drive inner turntable relative to outer turntable rotation, two opposite components drive four test components to move two by two, simulate the bidirectional shear force of flange, test the shear performance of flange under this working condition, when plug-in assembly is plugged with inner turntable, it can drive inner turntable and outer turntable to rotate simultaneously, so that four test components rotate simultaneously, simulate the connecting part of flange to receive continuous torsional shear force, test the shear strength of flange under torsional shear, improve the functionality of steel beam shear strength testing device.

Description

Technical Field

[0001] This invention relates to the field of shear strength testing technology, and more specifically, to a shear strength testing device for steel beams used in building structural engineering. Background Technology

[0002] In the field of building structures, steel beams, as key load-bearing components, directly affect the safety and stability of the entire building structure, such as... Figure 1 The I-beams shown are widely used in various construction projects due to their excellent mechanical properties. Currently, various technical methods have been developed for testing the shear strength of I-beams. One common method is to apply a vertical load to the steel beam specimen using a universal testing machine to simulate the actual stress situation. Strain gauges are then attached to the surface of the steel beam to measure the strain changes at different locations during the loading process, and the shear strength is calculated based on the principles of mechanics of materials.

[0003] In actual working conditions, the connection points between the flanges and other components are critical stress-bearing areas. Their shear resistance not only affects the deformation and load-bearing capacity of the steel beam itself under load, but also plays a decisive role in maintaining the integrity of the building structure under extreme load conditions such as earthquakes and strong winds. If the shear resistance of the flanges is insufficient, the steel beam may experience severe failure modes such as local buckling, cracking, or even fracture under large shear forces, thus causing safety hazards to the entire building structure. Therefore, accurate assessment and assurance of the shear resistance of I-beam flanges is also an important reference factor in building structural design. However, most existing testing equipment has limited functionality, focusing only on general testing of the entire steel beam, and is unable to simulate the stress state of the flange connection points under various actual working conditions. In view of this, we propose a shear strength testing device for steel beams in building structural engineering. Summary of the Invention

[0004] The purpose of this invention is to provide a shear strength testing device for steel beams used in building structural engineering, so as to solve the technical problem of low functionality of such devices.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a shear strength testing device for steel beams used in building structural engineering, comprising a testing machine body, a lifting slide plate unit provided in the testing cavity of the testing machine body, the movable end of the lifting slide plate unit being fixedly connected to the movable end of the hydraulic mechanism of the testing machine body, a fixing mechanism and a mounting base B being fixedly provided on both sides of the bottom end of the testing cavity of the testing machine body, and a testing mechanism being provided on the mounting base B; the testing mechanism includes an inner turntable and an outer turntable rotatably mounted on the mounting base B, the inner turntable being connected to the movable end of the lifting slide plate unit through a transmission mechanism, a gear A being fixedly mounted on the inner turntable, and two sets of transverse sliding grooves symmetrically opened on the outer turntable away from the inner turntable, each set of transverse sliding grooves including two symmetrically arranged ones, a testing component being slidably mounted on the transverse sliding groove, two testing components being connected through opposing components, the input end of the opposing components being meshed with the gear A, and a plurality of plug-in components being provided on the outer turntable, the plug-in components being plugged into and engaged with the mounting base B and the inner turntable respectively. This invention designs a testing mechanism structure such that when the plug-in component is plugged into the mounting base B, the hydraulic mechanism of the testing machine body drives the inner turntable to rotate relative to the outer turntable through the movable end of the lifting slide unit and the transmission mechanism. The two opposing components drive the four testing components to move in pairs, simulating the bidirectional shear force of the flange and testing the shear resistance of the flange under this working condition. When the plug-in component is plugged into the inner turntable, the hydraulic mechanism of the testing machine body drives the inner and outer turntables to rotate simultaneously through the movable end of the lifting slide unit and the transmission mechanism, causing the four testing components to rotate simultaneously, simulating the continuous torsional shear force on the flange connection part and testing the shear strength of the flange under torsional shear. This invention simulates the stress state of the flange connection node under various actual working conditions, thereby improving the functionality of the steel beam shear strength testing device and solving the technical problem of low functionality of the steel beam shear strength testing device.

[0006] Preferably, the fixing mechanism includes a mounting base A, which is fixedly disposed on one side of the bottom end of the test chamber of the testing machine body. The mounting base A has a slot, and a clamping assembly is fixedly disposed on the slot. The clamping assembly includes a slide fixedly disposed on the slot. A motor X is fixedly disposed at the top of the slide. A counteracting lead screw is rotatably connected to the slide. The counteracting lead screw is fixedly connected to the output shaft of the motor X. Both ends of the counteracting lead screw are threadedly connected to sliders A that are slidably connected to the slide. A clamping unit is fixedly disposed on slider A. Two positioning pins are fixedly disposed on each of the two clamping units.

[0007] Preferably, the mounting base B has a rotating groove A, the surface of the rotating groove A has a rotating groove B, and the rotating groove B has a plurality of insertion grooves A communicating with the rotating groove A; the inner turntable is rotatably mounted on the rotating groove A, the inner turntable has a circular cavity on the side near the mounting base A, and the inner turntable has a plurality of insertion grooves B opposite to the plurality of insertion grooves A, and the gear A is fixed on the circular cavity.

[0008] Preferably, the outer turntable is located on the side of the inner turntable near the mounting base A and is rotatably connected to the rotating groove A. Two rotating cavities are symmetrically opened at the end of the outer turntable near the inner turntable. The transverse sliding groove is connected to the corresponding rotating cavity. Several movable grooves are opened on the outer surface of the outer turntable relative to several insertion grooves B.

[0009] Preferably, the test assembly includes a slider X, which is slidably disposed on the transverse groove. A support is fixedly disposed on the slider X, and a test column is threadedly connected to the support. A sensor is disposed inside the test column, and a screw block is fixedly disposed at the top of the test column.

[0010] Preferably, the opposing component includes an elliptical block and a gear B. The elliptical block is rotatably mounted on the rotating cavity. An elliptical groove is formed on the surface of the elliptical block. Ball blocks A are movably connected to both ends of the elliptical groove. The two ball blocks A are respectively fixedly connected to the two corresponding sliders X. The gear B is mounted on the circular cavity and meshes with the gear A. The gear B is fixedly connected to the elliptical block.

[0011] Preferably, the plug-in assembly includes a plug and a bolt. The plug is slidably disposed on the movable groove, and both ends of the plug are respectively plugged into the plug groove A and the plug groove B. The bolt is rotatably disposed on the outer turntable, and the threaded part of the bolt passes through the movable groove and is threadedly connected to the plug.

[0012] Preferably, the transmission mechanism includes a rack and a connecting shaft. The rack is fixed to the movable end of the lifting slide plate unit. The connecting shaft is rotatably mounted on the mounting base B and fixedly connected to the inner turntable. A gear C that meshes with the rack is fixed on the connecting shaft. A limiting shaft is slidably connected to the rack. The limiting shaft is fixedly connected to the bottom end of the test chamber of the testing machine body.

[0013] Preferably, the rack has a vertical groove, and a plurality of horizontal grooves communicating with the vertical groove are evenly provided on one side of the rack. A toothed block is slidably connected to the horizontal groove, and the vertical groove is provided with an adjustment component for driving the plurality of toothed blocks to move.

[0014] Preferably, the adjustment assembly includes a vertical bar and a motor A. The vertical bar is slidably disposed on the vertical groove. Several trapezoidal grooves are formed on the vertical bar relative to the positions of several toothed blocks. An inclined guide groove is formed on the inclined surface of the trapezoidal groove. Vertical guide grooves are provided at both ends of the inclined guide groove. The inclined guide groove and the two vertical guide grooves are connected to form a displacement guide groove. A ball block B fixedly connected to the toothed blocks is movably disposed on the displacement guide groove. A one-way screw is threaded to the top of the vertical bar. The motor A is fixedly disposed at the movable end of the lifting slide plate unit. The top of the one-way screw is fixedly connected to the output shaft of the motor A.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention designs a test mechanism structure such that when the plug-in component is plugged into the mounting base B, the hydraulic mechanism of the test machine body drives the inner turntable to rotate relative to the outer turntable through the movable end of the lifting slide unit and the transmission mechanism. The two opposing components drive the four test components to move in pairs, simulating the bidirectional shear force of the flange and testing the shear resistance of the flange under this working condition. When the plug-in component is plugged into the inner turntable, the hydraulic mechanism of the test machine body drives the inner and outer turntables to rotate simultaneously through the movable end of the lifting slide unit and the transmission mechanism, so that the four test components rotate simultaneously, simulating the continuous torsional shear force on the connection part of the flange and testing the shear strength of the flange under torsional shear. This invention simulates the stress state of the flange connection node under various actual working conditions, thereby improving the functionality of the steel beam shear strength test device and solving the technical problem of low functionality of the steel beam shear strength test device.

[0017] 2. By further configuring the rack, the present invention prevents the toothed block from meshing with gear C when it moves into the transverse groove. The rack forms a discontinuous intermittent shape, which can drive gear C, the connecting shaft, and the inner turntable to rotate intermittently, simulating the intermittent stress on the steel beam flange. When the toothed block and the rack are in a continuous toothed shape, they can drive gear C, the connecting shaft, and the inner turntable to rotate continuously, simulating the continuous stress on the steel beam flange. This enhances the present invention's ability to simulate various stress scenarios and provides more comprehensive data support for testing the shear resistance of the flange, thereby further improving the functionality of the shear test of the present invention.

[0018] Furthermore, during intermittent driving, the duration of each intermittent cycle allows for greater variation in the output force of the hydraulic cylinder, resulting in a stepped change in the shear force applied to the flange. This stepped force application is more conducive to testing the shear resistance of the flange at different force levels, providing richer information for analyzing the stress variation law of the flange, thereby further enhancing the functionality of the shear test of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the I-beam structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 3 This is a partial structural schematic diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the lifting slide plate unit of the present invention;

[0023] Figure 5 This is a schematic diagram of the fixing mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the clamping assembly of the present invention;

[0025] Figure 7 This is a schematic diagram showing the disassembled structure of the mounting base B, the testing mechanism, and the transmission mechanism of the present invention;

[0026] Figure 8 This is a cross-sectional structural breakdown diagram of the testing mechanism of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the inner turntable and gear A of the present invention;

[0028] Figure 10 This is a partial structural breakdown diagram of the testing mechanism of the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of the test component and the opposing component of the present invention;

[0030] Figure 12 This is a schematic diagram of the transmission mechanism of the present invention;

[0031] Figure 13 This is a schematic diagram showing the cross-sectional structure of the vertical strip of the present invention.

[0032] Explanation of the labels in the diagram:

[0033] 1. Testing machine body; 2. Lifting slide unit; 3. Fixing mechanism; 4. Mounting base B; 5. Testing mechanism; 6. Transmission mechanism;

[0034] 21. Lifting platform; 22. Column; 23. Motor slot;

[0035] 31. Mounting base A; 32. Empty slot; 33. Clamping assembly;

[0036] 331. Slide; 332. Motor X; 333. Opposing lead screw; 334. Slider A; 335. Clamping unit; 336. Positioning pin;

[0037] 41. Rotary slot A; 42. Rotary slot B; 43. Insertion slot A;

[0038] 51. Inner turntable; 52. Gear A; 53. Outer turntable; 54. Test assembly; 55. Opposing assembly; 56. Connecting assembly;

[0039] 511. Circular cavity; 512. Insertion slot B;

[0040] 531. Rotating cavity; 532. Horizontal sliding groove; 533. Movable groove;

[0041] 541. Slider X; 542. Support; 543. Test post; 544. Screw block;

[0042] 551. Elliptical block; 552. Elliptical groove; 553. Spherical block A; 554. Gear B;

[0043] 561. Insert block; 562. Bolt;

[0044] 61. Rack; 62. Coupling; 63. Gear C; 64. Limiting shaft;

[0045] 611. Vertical groove; 612. Horizontal groove; 614. Tooth block; 613. Adjustment component;

[0046] 6131. ​​Vertical bar; 6132. Trapezoidal groove; 6133. Inclined guide groove; 6134. Vertical guide groove; 6135. Displacement guide groove; 6136. Ball block B; 6137. One-way lead screw; 6138. Motor A. Detailed Implementation

[0047] like Figures 1 to 13 As shown, the present invention relates to a shear strength testing device for steel beams used in building structural engineering, comprising a testing machine body 1, a lifting slide unit 2, a fixing mechanism 3, a mounting base B4, a testing mechanism 5, and a transmission mechanism 6;

[0048] In embodiments of the present invention, such as Figure 2 As shown, the testing machine body 1 includes one type of hydraulic testing machine, such as a universal testing machine, which is existing technology and will not be described in detail here.

[0049] In embodiments of the present invention, such as Figure 2 , Figure 3 and Figure 4 As shown, the lifting slide unit 2 includes a lifting plate 21 disposed within the testing chamber of the testing machine body 1. The lifting plate 21 is fixedly connected to the movable end of the hydraulic mechanism of the testing machine body 1. Columns 22 are slidably provided at both ends of the lifting plate 21, and the two ends of the columns 22 are respectively fixedly connected to the two ends of the testing chamber of the testing machine body 1. A motor slot 23 is provided at the top of the lifting plate 21. Through the above-described lifting slide unit 2, the present invention enables the movable end of the hydraulic mechanism of the testing machine body 1 to drive the lifting plate 21 to rise and fall.

[0050] In embodiments of the present invention, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the fixing mechanism 3 includes a mounting base A31, which is fixedly mounted on one side of the bottom end of the test chamber of the test machine body 1. A slot 32 is provided on the mounting base A31, and a clamping component 33 is fixedly mounted on the slot 32.

[0051] In an embodiment of the present invention, the clamping assembly 33 includes a slide block 331 fixedly mounted on a slot 32. A motor X332 is fixedly mounted on the top of the slide block 331. A counteracting lead screw 333 is rotatably connected to the slide block 331. The counteracting lead screw 333 is fixedly connected to the output shaft of the motor X332. Both ends of the counteracting lead screw 333 are threadedly connected to sliders A334 that are slidably connected to the slide block 331. Clamping units 335 are fixedly mounted on sliders A334. Two positioning pins 336 are fixedly mounted on each of the two clamping units 335. Through the above-mentioned arrangement, the output shaft of the motor X332 rotates, driving the counteracting lead screw 333 to rotate, causing the two sliders A334 to slide relative to the slide block 331. Through the structural design of the fixing mechanism 3, the clamping assembly 33 can fix one side of the steel beam. It is worth mentioning that the positioning pins 336 are used to limit the connection node of the flange, which facilitates subsequent testing.

[0052] In embodiments of the present invention, such as Figure 2 , Figure 5 and Figure 7 As shown, mounting base B4 is fixed on the other side of the bottom of the test chamber of the test machine body 1. Mounting base B4 has a rotating groove A41, rotating groove B42 is formed on the surface of rotating groove A41, and several insertion grooves A43 communicating with rotating groove A41 are formed on rotating groove B42.

[0053] In embodiments of the present invention, such as Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the testing mechanism 5 includes an inner turntable 51, a gear A 52, an outer turntable 53, four testing components 54, two opposing components 55, and several plug-in components 56.

[0054] In an embodiment of the present invention, the inner turntable 51 is rotatably mounted on the rotating groove A41. A circular cavity 511 is provided on the side of the inner turntable 51 near the mounting base A31. A plurality of insertion grooves B512 are provided on the inner turntable 51 relative to the positions of the plurality of insertion grooves A43. The gear A52 is fixed on the circular cavity 511.

[0055] In an embodiment of the present invention, the outer turntable 53 is disposed on the side of the inner turntable 51 near the mounting base A31 and is rotatably connected to the rotating groove A41. Two rotating cavities 531 are symmetrically opened at the end of the outer turntable 53 near the inner turntable 51. Two sets of transverse sliding grooves 532 are symmetrically opened at the end of the rotating cavity 531 away from the inner turntable 51. Each set of transverse sliding grooves 532 includes two symmetrically arranged relative to the rotating cavity 531. The transverse sliding grooves 532 are connected to the rotating cavity 531. Several movable grooves 533 are opened on the outer surface of the outer turntable 53 relative to the positions of several insertion grooves B512.

[0056] In an embodiment of the present invention, four test components 54 are respectively disposed on four transverse sliding grooves 532. Each test component 54 includes a slider X541, which is slidably disposed on the transverse sliding groove 532. A support 542 is fixedly mounted on the slider X541, and a test post 543 is threadedly connected to the support 542. A sensor is disposed inside the test post 543, and a screw block 544 is fixedly mounted at the top of the test post 543. Through the structural design of the test component 54, during testing, rotating the screw block 544 inserts the test post 543 into the flange connection portion.

[0057] In an embodiment of the present invention, two opposing components 55 are respectively disposed on two rotating cavities 531. Specifically, the opposing components 55 include an elliptical block 551 and a gear B554. The elliptical block 551 is rotatably disposed on the rotating cavity 531. An elliptical groove 552 is opened on the surface of the elliptical block 551. Ball blocks A553 are movably connected to both ends of the elliptical groove 552. The two ball blocks A553 are respectively fixedly connected to the two corresponding sliders X541. The gear B554 is disposed on the circular cavity 511 and meshes with the gear A52. The gear B554 is fixedly connected to the elliptical block 551.

[0058] In an embodiment of the present invention, a plurality of plug-in components 56 are respectively disposed on a plurality of movable slots 533. Specifically, the plug-in component 56 includes a plug block 561 and a bolt 562. The plug block 561 is slidably disposed on the movable slot 533. The two ends of the plug block 561 are respectively plugged into the plug slot A43 and the plug slot B512. The bolt 562 is rotatably disposed on the outer turntable 53. The threaded part of the bolt 562 passes through the movable slot 533 and is threadedly connected to the plug block 561. This invention, through the structural design of the testing mechanism 5, allows the rotating bolt 562 and the insert block 561 to slide relative to the movable groove 533. When the insert block 561 is located within the movable groove 533, it engages with the insertion groove A43 and disengages from the insertion groove B512, preventing the outer turntable 53 from rotating relative to the mounting base B4, while allowing it to rotate relative to the inner turntable 51. At this time, the rotation of the inner turntable 51 and gear A52 drives the rotation of two gears B554, causing the elliptical block 551 to rotate. This causes the four sliders X541 to move in pairs relative to the four sliding grooves 532, thereby enabling the support 542 corresponding to the slider X541 and the test column 543 to move synchronously, simulating the wing. The bidirectional shear force of the flange is tested to assess its shear resistance under this working condition. When the insert block 561 enters the rotating slot B42, the insert block 561 disengages from the insertion slot A43 and inserts into the insertion slot B512. At this time, the insert block 561 can rotate in the rotating slot B42, allowing the outer turntable 53 to rotate relative to the mounting base B4, but not relative to the inner turntable 51. When the inner turntable 51 and gear A52 rotate, the outer turntable 53 rotates synchronously, causing the four test components 54 to rotate simultaneously. This simulates the continuous torsional shear force on the flange connection, testing the shear strength of the flange under torsional shear, thereby simulating the stress state of the flange connection node under various actual working conditions.

[0059] In embodiments of the present invention, such as Figure 12 and Figure 13 As shown, the transmission mechanism 6 includes a rack 61 and a connecting shaft 62. The rack 61 is fixedly mounted on one side of the bottom end of the lifting plate 21. The connecting shaft 62 is rotatably mounted on the mounting base B4 and fixedly connected to the inner turntable 51. A gear C63 that meshes with the rack 61 is fixedly mounted on the connecting shaft 62. A limiting shaft 64 is slidably connected to the rack 61. The limiting shaft 64 is fixedly connected to the bottom end of the testing chamber of the testing machine body 1. Through the above arrangement, the lifting plate 21 moves up and down, causing the rack 61 to move up and down and slide relative to the limiting shaft 64, thereby causing the gear C63 to drive the connecting shaft 62 and the inner turntable 51 to rotate.

[0060] In an embodiment of the present invention, a vertical groove 611 is provided on the rack 61, and a plurality of horizontal grooves 612 communicating with the vertical groove 611 are evenly provided on one side of the rack 61. A toothed block 614 is slidably connected to the horizontal groove 612, and an adjustment component 613 for driving the toothed blocks 614 to move is provided on the vertical groove 611. By further configuring the rack 61, the present invention makes it so that when the toothed block 614 moves into the horizontal groove 612, the toothed block 614 cannot mesh with the gear C63, and the rack 61 forms a discontinuous intermittent state, which can drive the gear C63, the connecting shaft 62 and the inner turntable 51 to rotate intermittently, simulating the intermittent stress on the steel beam flange. When the toothed block 614 and the rack 61 are continuously toothed, the gear C63, the connecting shaft 62 and the inner turntable 51 can be driven to rotate continuously, simulating the continuous stress on the steel beam flange. This enhances the simulation capability of the present invention for various stress scenarios, provides more comprehensive data support for testing the shear resistance of the flange, and further improves the functionality of the shear test of the present invention.

[0061] Furthermore, during intermittent driving, the duration of each intermittent cycle allows for greater variation in the output force of the hydraulic cylinder, resulting in a stepped change in the shear force applied to the flange. This stepped force application is more conducive to testing the shear resistance of the flange at different force levels, providing richer information for analyzing the stress variation law of the flange, thereby further enhancing the functionality of the shear test of this invention.

[0062] In an embodiment of the present invention, the adjustment component 613 includes a vertical bar 6131 and a motor A 6138. The vertical bar 6131 is slidably disposed on a vertical groove 611. A plurality of trapezoidal grooves 6132 are provided on the vertical bar 6131 relative to a plurality of toothed blocks 614. An inclined guide groove 6133 is provided on the inclined surface of the trapezoidal groove 6132. Vertical guide grooves 6134 are provided at both ends of the inclined guide groove 6133. The inclined guide groove 6133 and the two vertical guide grooves 6134 are connected to form a displacement guide groove 6135. A ball block B6136 fixedly connected to the toothed blocks 614 is movably disposed on the displacement guide groove 6135. A one-way screw 6137 is threadedly connected to the top of the vertical bar 6131. ​​The one-way screw 6137 is rotatably connected to the lifting plate 21. The motor A 6138 is fixedly disposed on the motor groove 23. The top of the one-way screw 6137 passes through the motor groove 23 and is fixedly connected to the output shaft of the motor A 6138. The present invention, through the structural design of the adjustment component 613, enables the output shaft of motor A6138 to rotate and drive the one-way lead screw 6137 to rotate, causing the vertical bar 6131 to slide along the vertical groove 611, and causing the displacement guide groove 6135 to move relative to the ball block B6136. When the inclined guide groove 6133 passes through the ball block B6136, the ball block B6136 drives the tooth block 614 to move relative to the horizontal groove 612.

[0063] Working principle: This embodiment provides a steel beam shear strength testing device for building structural engineering. When in use, the position of the insert block 561 is adjusted according to the requirements to test the torsional shear force or bidirectional shear force of the flange.

[0064] According to the requirements, the movement of several toothed blocks 614 is adjusted by motor A6138 so that the rack 61 forms a continuous tooth shape or a discontinuous intermittent shape, simulating the continuous or intermittent stress of the steel beam flange, and testing the shear performance of the steel beam, providing more comprehensive data support for testing the shear performance of the flange.

[0065] The steel beam can be fixed on one side using the clamping assembly 33. The positioning pin 336 is used to limit the connection node of the flange so that the connection node on the other side of the steel beam is aligned with the four test components 54. The rotating screw block 544 inserts the test column 543 into the connection part of the flange.

[0066] The hydraulic mechanism of the test machine body 1 drives the lifting plate 21 and rack 61 to rise and fall, thereby causing the gear C63 to drive the inner turntable 51 to rotate through the connecting shaft 62, and perform shear resistance test on the I-shaped steel beam.

[0067] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A device for testing the shear strength of a steel beam for construction engineering, characterized in that, Including test machine body (1), the test cavity of test machine body (1) is equipped with lifting slide plate unit (2), the movable end of lifting slide plate unit (2) is fixedly connected with the movable end of the hydraulic mechanism of test machine body (1), and the bottom end of the test cavity of test machine body (1) is respectively fixed with fixed mechanism (3) and mounting seat B (4), and test mechanism (5) is arranged on mounting seat B (4); The test mechanism (5) includes an inner rotating disc (51) and an outer rotating disc (53) rotatably arranged on the mounting seat B (4), the inner rotating disc (51) is connected with the movable end of the lifting slide plate unit (2) through a transmission mechanism (6), the inner rotating disc (51) is fixedly provided with a gear A (52), the outer rotating disc (53) is symmetrically provided with two groups of horizontal sliding grooves (532) at one end away from the inner rotating disc (51), each group of the horizontal sliding grooves (532) includes two horizontally arranged horizontal sliding grooves (532), the test assembly (54) is slidably arranged on the horizontal sliding groove (532), the two test assemblies (54) are connected through the opposite assembly (55), the input end of the opposite assembly (55) is engagedly connected with the gear A (52), and a plurality of plug-in assemblies (56) are arranged on the outer rotating disc (53); the plug-in assemblies (56) are respectively plug-in matched with the mounting seat B (4) and the inner rotating disc (51); The fixed mechanism (3) includes a mounting seat A (31); A rotating groove A (41) is formed in the mounting seat B (4), a rotating groove B (42) is formed in the surface of the rotating groove A (41), and a plurality of plug-in grooves A (43) in communication with the rotating groove A (41) are formed in the rotating groove B (42); The inner rotating disc (51) is rotatably arranged in the rotating groove A (41), and a plurality of plug-in grooves B (512) are formed in the inner rotating disc (51) at positions corresponding to the plug-in grooves A (43); The outer rotating disc (53) is arranged on the side of the inner rotating disc (51) close to the mounting seat A (31) and is rotatably connected with the rotating groove A (41), and a plurality of movable grooves (533) are formed in the outer surface of the outer rotating disc (53) at positions corresponding to the plug-in grooves B (512); The plug-in assembly (56) includes a plug block (561) and a bolt (562), the plug block (561) is slidably arranged in the movable groove (533), the plug block (561) is plug-in matched with the plug-in grooves A (43) and the plug-in grooves B (512) at both ends, and the bolt (562) is rotatably arranged on the outer rotating disc (53), and the threaded part of the bolt (562) penetrates into the movable groove (533) and is threadedly connected with the plug block (561).

2. The apparatus for testing the shear strength of a steel beam for building structural engineering according to claim 1, wherein The mounting seat A (31) is fixedly arranged on one side of the bottom end of the test cavity of the test machine body (1), an empty groove (32) is formed in the mounting seat A (31), and a clamping assembly (33) is fixedly arranged in the empty groove (32). The clamping assembly (33) comprises a sliding seat (331) fixed on the hollow groove (32), a motor X (332) is fixed on the top end of the sliding seat (331), an opposite screw rod (333) is rotatably connected to the sliding seat (331), the opposite screw rod (333) is fixedly connected with the output shaft of the motor X (332), and sliding blocks A (334) are threadedly connected to the two ends of the opposite screw rod (333) and are slidably connected with the sliding seat (331). The clamping units (335) are fixed on the sliding blocks A (334), and two positioning pins (336) are fixed on the clamping units (335).

3. The apparatus for testing the shear strength of a steel beam for building construction engineering according to claim 2, characterized in that, The inner rotating disc (51) is provided with a circular cavity (511) on the side close to the mounting seat A (31), and the gear A (52) is fixed on the circular cavity (511).

4. The apparatus for testing the shear strength of a steel beam for building construction engineering according to claim 3, characterized in that, The outer rotating disc (53) is symmetrically provided with two rotating cavities (531) on the side close to the inner rotating disc (51), and the horizontal sliding groove (532) is in communication with the corresponding rotating cavity (531).

5. The apparatus for testing the shear strength of a steel beam for building construction engineering according to claim 4, characterized in that, The test assembly (54) comprises a sliding block X (541), the sliding block X (541) is slidably arranged on the horizontal sliding groove (532), a support (542) is fixed on the sliding block X (541), a test column (543) is threadedly connected to the support (542), a sensor is arranged in the test column (543), and a screw block (544) is fixed on the top end of the test column (543).

6. The shear strength testing device for a structural steel beam for construction engineering according to claim 5, characterized by, The opposite assembly (55) comprises an oval block (551) and a gear B (554), the oval block (551) is rotatably arranged in the rotating cavity (531), an oval groove (552) is formed in the surface of the oval block (551), ball blocks A (553) are movably connected to the two ends of the oval groove (552), the two ball blocks A (553) are fixedly connected with the corresponding two sliding blocks X (541), the gear B (554) is arranged on the circular cavity (511) and is in meshing connection with the gear A (52), and the gear B (554) is fixedly connected with the oval block (551).

7. The apparatus for testing the shear strength of a steel beam for building structural engineering according to claim 1, wherein The transmission mechanism (6) comprises a rack (61) and a connecting shaft (62), the rack (61) is fixed on the movable end of the lifting sliding plate unit (2), the connecting shaft (62) is rotatably arranged on the mounting seat B (4) and is fixedly connected with the inner rotating disc (51), a gear C (63) is fixed on the connecting shaft (62) and is in meshing connection with the rack (61), a limiting shaft (64) is slidably connected to the rack (61), and the limiting shaft (64) is fixedly connected with the bottom end of the test cavity of the test machine body (1).

8. The apparatus for testing the shear strength of a steel beam for building construction engineering according to claim 7, characterized in that, A vertical groove (611) is formed in the rack (61), a plurality of horizontal grooves (612) in communication with the vertical groove (611) are uniformly formed on one side of the rack (61), a tooth block (614) is slidably connected to the horizontal groove (612), and the vertical groove (611) is provided with an adjusting assembly (613) for driving the plurality of tooth blocks (614) to move.

9. The shear strength testing device for a steel beam used in a construction engineering according to claim 8, characterized by, The adjusting assembly (613) comprises a vertical strip (6131) and a motor A (6138), the vertical strip (6131) is slidably arranged on the vertical groove (611), a plurality of trapezoidal grooves (6132) are formed on the vertical strip (6131) in a position opposite to the plurality of tooth blocks (614), an inclined guide groove (6133) is formed on the inclined surface of the trapezoidal groove (6132), vertical guide grooves (6134) are arranged at both ends of the inclined guide groove (6133), the inclined guide groove (6133) and the two vertical guide grooves (6134) are communicated to form a displacement guide groove (6135), a ball block B (6136) fixedly connected with the tooth block (614) is movably arranged on the displacement guide groove (6135), a one-way screw rod (6137) is threadedly connected to the top end of the vertical strip (6131), the motor A (6138) is fixedly arranged on the movable end of the lifting skateboard unit (2), and the top end of the one-way screw rod (6137) is fixedly connected with the output shaft of the motor A (6138).

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