Lateral loading test device for large steel pipe support frame structure

Abstract

The invention relates to the technical field of lateral loading tests of steel pipe support frames, and discloses a lateral loading test device for a large steel pipe support frame structure, a plurality of groups of hydraulic cylinders are arranged on a lateral mounting frame, and piston rods at the output ends of the hydraulic cylinders are fixedly connected with distribution beams by adopting limiting locking quick-release assemblies; according to the steel pipe supporting frame assembly self-locking test bench, through the arrangement of the limiting locking quick release assembly, quick assembly or disassembly of the distribution beam and the piston rod can be achieved, and the steel pipe supporting frame assemblies of different sizes can be matched with the distribution beams of the corresponding sizes. After the bottom of the steel pipe supporting frame assembly makes contact with the top of the self-locking fixing assembly, the bottom of the steel pipe supporting frame assembly is locked and fixed through the self-locking fixing assembly under the gravity effect of the steel pipe supporting frame assembly, and therefore fixing of the steel pipe supporting frame assembly can be rapidly achieved; and the bottom of the steel pipe supporting frame assembly is prevented from moving or shaking in the test process.

Description

Technical Field

[0001] The present invention relates to the technical field of lateral loading tests for steel pipe support frames, and particularly to a lateral loading test device for large steel pipe support frame structures. Background Art

[0002] There are several important reasons for conducting lateral loading tests on steel pipe support frames: Evaluating stability: In actual use, steel pipe support frames may be subjected to lateral forces, such as wind forces, horizontal impact forces during construction, and lateral pressures during concrete pouring. Through lateral loading tests, these actual working conditions can be simulated to evaluate the stability of the support frame under lateral forces, check whether it can maintain structural integrity and load-bearing capacity, prevent lateral instability failure, and ensure construction safety.

[0003] Inspecting connection performance: Steel pipe support frames are assembled from numerous steel pipes through various connection methods. Lateral loading tests can inspect the performance of these connection parts under lateral forces, including the strength, stiffness, and reliability of the connectors. If there are defects or deficiencies in the connection parts, loosening, slipping, or even failure may occur during lateral loading, thus affecting the load-bearing capacity and stability of the entire support frame. Problems in the connection parts can be discovered through the test, so as to take corresponding improvement measures and improve the connection quality.

[0004] Determining mechanical property parameters: Through lateral loading tests, mechanical property parameters such as stress, strain distribution, and deformation laws of steel pipe support frames under lateral forces can be obtained. These parameters are of great significance for accurately evaluating the load-bearing capacity of the support frame, conducting structural design, and safety checking. Designers can optimize the structure of the support frame based on the actual parameters obtained from the test, making it more economical and reasonable while meeting safety requirements.

[0005] Verifying design theories and methods: The results of lateral loading tests can be compared with the predicted results of design theories and calculation methods to verify the correctness and accuracy of the design theories and methods. If there are significant deviations between the test results and the design predictions, it is necessary to correct and improve the design theories and methods, thereby improving the reliability and scientific nature of the design of steel pipe support frames and providing a more reliable basis for future engineering designs.

[0006] Meeting specification and standard requirements: In fields such as building construction, relevant specifications and standards have put forward strict requirements for the design, construction, and acceptance of steel pipe support frames. Lateral loading tests are one of the important means to test whether steel pipe support frames meet these specifications and standards. Only by proving through tests that the support frame meets the relevant requirements can it be put into actual use to ensure that the project quality and construction safety meet national and industry standards.

[0007] In the field of current lateral loading test technology for steel pipe support frames, there are many deficiencies in existing test devices. In terms of the connection between the distribution beam and the piston rod of some devices, there is a lack of efficient and convenient assembly and disassembly structures, making it difficult to quickly adapt to steel pipe support frame components of different sizes, consuming a long time in the test preparation and adjustment processes, and affecting the test efficiency. Moreover, when applying lateral loads, it is difficult for the existing connection structures to ensure the stability of the distribution beam without deviation, with risks of connection loosening and distribution beam offset, resulting in inaccurate and unreliable test data.

[0008] At the same time, for the fixation of steel pipe support frame components, the traditional method is cumbersome to operate and cannot achieve quick fixation. During the test process, the bottom of the components may also move or shake, which not only interferes with the test process but may also cause safety problems and cannot provide stable and reliable basic conditions for the test. For this reason, we introduce a lateral loading test device for large steel pipe support frame structures. Summary of the Invention

[0009] The purpose of the present invention is to provide a lateral loading test device for large steel pipe support frame structures to solve the problems raised in the above background technology.

[0010] To achieve the above purpose, the present invention provides the following technical solutions: A lateral loading test device for large steel pipe support frame structures includes a test bench and a side mounting frame vertically fixed at one end of the test bench. A number of hydraulic cylinders are provided on the side mounting frame, and the piston rod at the output end of the hydraulic cylinder is fixedly connected with a distribution beam by a limit locking quick-release component. After the bolt component on the limit locking quick-release component is tightened and fixed, the right end of the limit locking quick-release component is enlarged to achieve the limit locking and fixation of the distribution beam. After the bolt component is loosened, the right end of the limit locking quick-release component is reduced to reserve space for the disassembly and pre-installation of the distribution beam. A self-locking fixation component for locking and fixing the steel pipe support frame component is provided on the test bench. When the bottom of the steel pipe support frame component contacts the top of the self-locking fixation component, under the action of the self-weight of the steel pipe support frame component, the self-locking fixation component locks and fixes the bottom of the steel pipe support frame component. The piston rod of the hydraulic cylinder extends, causing the distribution beam to push the steel pipe support frame component to simulate the load received laterally by the steel pipe support frame component.

[0011] Preferably, the distribution beam includes a number of horizontally arranged I-beams equally spaced and a number of vertically arranged I-beams fixed to the horizontally arranged I-beams by locking bolts.

[0012] Preferably, a moving seat is provided at the bottom of the vertically arranged I-beam. An insertion slot for inserting the vertically arranged I-beam is provided at the upper end of the moving seat, and rollers are provided at the bottom of the moving seat, and the rollers are located on the upper surface of the test bench.

[0013] Preferably, two sets of limiting rods are provided at the left end of the movable seat, and the limiting rods extend through the side mounting frame.

[0014] Preferably, the right end of the piston rod is provided with side limit grooves at equal intervals; The limit locking quick release assembly comprises a left-end limit piece fixed at the left end between the plurality of groups of side limit grooves and a right-end limit piece movably connected at equal intervals to the right end of the left-end limit piece; The right end limit piece is connected with the bolt assembly by a driving assembly. After the right end of the piston rod extends through the socket on the transverse I-beam and the bolt assembly is locked with the middle part of the left end limit piece, the driving assembly drives the right end limit piece to open and expand, so that the left end limit piece and the right end limit piece are respectively limited and locked and fixed at the left and right ends of the transverse I-beam.

[0015] Preferably, the left end limiting member comprises a disc, a left end limiting protrusion arranged at equal intervals on the side of the disc, an internal threaded cylinder fixed in the middle of the right end of the disc, and a connecting ear plate arranged at the right end of the left end limiting protrusion; The left end limiting protrusion extends through the corresponding side limiting groove; The right end stopper comprises a tensioning arm movably connected to the connecting ear plate by a pin shaft and a right end stopper protrusion arranged on the outer side of the right end of the tensioning arm; The bolt assembly comprises a bolt rod threadedly connected to the internal threaded barrel and a bolt head fixed at the right end of the bolt rod; The driving assembly comprises a left stop ring and a right stop ring sleeved and fixed on the bolt rod, a sleeve ring sleeved on the bolt rod, and vertical ears arranged at equal intervals on the sides of the sleeve ring; The sleeve ring is located between the left limiting ring and the right limiting ring, and the first connecting rod between the vertical ears extends through the first connecting inclined groove on the tensioning arm.

[0016] Preferably, the steel pipe support frame assembly includes a plurality of groups of cross bars and a plurality of groups of vertical bars connected to the cross bars, and the left end of the cross bar extends into a steel groove on the vertical I-beam.

[0017] Preferably, a U-shaped groove is provided at the upper end of the test bench, a vertical groove is provided in the middle of the side wall of the U-shaped groove, and limiting grooves are provided on both sides of the side wall of the U-shaped groove; The self-locking fixing assembly includes a lifting plate slidably connected in the corresponding U-shaped groove and clamping plates located on the left and right sides above the lifting plate; The sliding protrusion on the side of the lifting plate is slidably connected in the corresponding limiting groove, and the return spring at the bottom of the lifting plate is connected to the bottom of the U-shaped groove; The side of the lifting plate is provided with a reserved slot corresponding to the vertical slot position, and a second connecting rod is provided inside the reserved slot; The bottom of the clamping plate is provided with a vertical convex plate. The bottom of the vertical convex plate is supported on the bottom of the U-shaped groove. The outside of the vertical convex plate is located in the corresponding vertical slot, and the inside of the vertical convex plate is located in the corresponding reserved slot. The second connecting rod passes through and extends out via the second connecting inclined groove on the vertical convex plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the setting of the limit locking quick-release assembly, the present invention can achieve the rapid assembly or disassembly of the distribution beam and the piston rod, which is beneficial to meeting the adaptation of steel pipe support frame assemblies of different sizes to distribution beams of corresponding sizes.

[0019] After the limit locking quick-release assembly assembles the distribution beam and the piston rod, the limit locking quick-release assembly forms limit locking and fixing of the distribution beam, which can ensure the fastening of the distribution beam and guarantee that the distribution beam will not deflect when a lateral load is applied to the steel pipe support frame assembly.

[0020] When the bottom of the steel pipe support frame assembly contacts the top of the self-locking and fixing assembly, under the action of the gravity of the steel pipe support frame assembly itself, the self-locking and fixing assembly locks and fixes the bottom of the steel pipe support frame assembly, so that the fixing of the steel pipe support frame assembly can be quickly realized, and the bottom of the steel pipe support frame assembly can be prevented from moving or shaking during the test. Description of the Drawings

[0021] Figure 1 It is the first three-dimensional structure schematic diagram of the whole of the present invention; Figure 2 It is the second three-dimensional structure schematic diagram of the whole of the present invention; Figure 3 It is the exploded structure schematic diagram of the installation of the transverse I-beam and the piston rod of the present invention; Figure 4 It is the exploded structure schematic diagram of the installation of the limit locking quick-release assembly and the piston rod of the present invention; Figure 5 It is the structure schematic diagram when the limit convex block at the right end of the present invention is closed and shrunk; Figure 6 It is the exploded structure schematic diagram of the connection of the limit member, the driving assembly and the bolt assembly at the right end of the present invention; Figure 7 It is the structure schematic diagram when the right end of the limit locking quick-release assembly of the present invention is shrunk; Figure 8 It is the structure schematic diagram when the right end of the limit locking quick-release assembly of the present invention is expanded; Figure 9 It is the structure schematic diagram of the limit locking quick-release assembly fixing the transverse I-beam and the piston rod of the present invention; Figure 10 It is the exploded structure schematic diagram of the overall assembly of the present invention; Figure 11 Schematic exploded view of the self-locking fixing assembly of the present invention; Figure 12 Schematic assembled view of the self-locking fixing assembly of the present invention and the test bench; Figure 13 For the present invention Figure 12 Schematic cross-sectional view; Figure 14 Schematic view of the structure when the self-locking fixing assembly of the present invention clamps and fixes the steel pipe support frame assembly; Figure 15 For the present invention Figure 14 Schematic cross-sectional view.

[0022] In the figure: 1, side mounting frame; 2, hydraulic cylinder; 3, horizontal I-beam; 301, jack; 4, limit rod; 5, test bench; 6, vertical I-beam; 7, steel pipe support frame assembly; 71, vertical rod; 72, cross bar; 8, moving seat; 801, roller; 9, self-locking fixing assembly; 901, lifting plate; 902, clamping plate; 903, vertical convex plate; 904, reserved slotted opening; 905, second connecting rod; 906, sliding projection; 907, return spring; 908, second connecting inclined slot; 10, U-shaped groove; 101, limit slotted opening; 102, vertical slotted opening; 11, slot; 12, socket ring; 13, first connecting rod; 14, piston rod; 15, side limit groove; 16, left end limit convex block; 17, disc; 18, tension arm; 19, right end limit convex block; 20, bolt rod; 21, bolt head; 22, internal thread cylinder; 23, pin shaft; 24, connecting ear plate; 25, left limit ring; 26, right limit ring; 27, vertical ear; 28, first connecting inclined slot; 29, locking bolt. Detailed implementation manners

[0023] 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 creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment: Please refer to Figures 1-15 , the present invention provides a technical solution: A lateral loading test device for a large steel pipe support frame structure, including a test bench 5 and a side mounting frame 1 vertically fixed at one end of the test bench 5. A plurality of groups of hydraulic cylinders 2 are provided on the side mounting frame 1, and the piston rod 14 at the output end of the hydraulic cylinder 2 is fixedly connected with a distribution beam by a limit locking quick-release assembly; The distribution beam includes several groups of horizontally arranged I-beams 3 evenly distributed at equal intervals and several groups of vertically arranged I-beams 6 fixed to the horizontally arranged I-beams 3 by locking bolts 29.

[0025] A moving seat 8 is provided at the bottom of the vertically arranged I-beam 6. An insertion slot 11 for inserting the vertically arranged I-beam 6 is provided at the upper end of the moving seat 8. A roller 801 is provided at the bottom of the moving seat 8, and the roller 801 is located on the upper surface of the test bench 5.

[0026] Such a moving seat 8 can smoothly slide along the upper surface of the test bench 5 through the roller 801, ensuring smooth and stable left-right movement of the distribution beam.

[0027] Two groups of limiting rods 4 are provided at the left end of the moving seat 8, and the limiting rods 4 extend through the side mounting frame 1.

[0028] The limiting rods 4 can prevent the moving seat 8 from shifting, ensuring the accuracy of the loading load direction on the side of the steel pipe support frame assembly 7 by the distribution beam.

[0029] Side limiting grooves 15 are equally spaced at the right end of the piston rod 14; The limit locking quick-release assembly includes a left-end limiting member fixed between several groups of side limiting grooves 15 at the left end and a right-end limiting member movably connected at equal intervals to the right end of the left-end limiting member; The right-end limiting member is connected to the bolt assembly by a driving assembly, extends through the jacking hole 301 on the horizontally arranged I-beam 3 at the right end of the piston rod 14, and after the bolt assembly is locked to the middle of the left-end limiting member, the driving assembly drives the right-end limiting member to open and expand, so that the left-end limiting member and the right-end limiting member are respectively limited and locked to the left and right ends of the horizontally arranged I-beam 3.

[0030] The left-end limiting member includes a disc 17, left-end limiting protrusions 16 equally spaced on the side of the disc 17, an internally threaded cylinder 22 fixed in the middle at the right end of the disc 17, and a connecting ear plate 24 provided at the right end of the left-end limiting protrusion 16; The left-end limiting protrusion 16 extends through the corresponding side limiting groove 15; The right-end limiting member includes a tension arm 18 movably connected to the connecting ear plate 24 by a pin shaft 23 and a right-end limiting protrusion 19 provided on the outer side of the right end of the tension arm 18; The bolt assembly includes a bolt rod 20 screwed to the internally threaded cylinder 22 and a bolt head 21 fixed to the right end of the bolt rod 20; by driving the bolt head 21 to rotate with a wrench, after the bolt rod 20 is locked to the internally threaded cylinder 22, the bolt head 21 abuts against the right-end surface of the piston rod 14.

[0031] The driving assembly includes a left limiting ring 25 and a right limiting ring 26 sleeved and fixed on the bolt rod 20, a socket ring 12 sleeved on the bolt rod 20, and vertical ears 27 equally spaced on the side of the socket ring 12; The socket ring 12 is located between the left limit ring 25 and the right limit ring 26, so that when the bolt rod 20 rotates, it can ensure that the socket ring 12 does not rotate, and the left limit ring 25 and the right limit ring 26 can drive the socket ring 12 to move back and forth along with the bolt rod 20.

[0032] The first connecting rod 13 between the vertical ears 27 passes through and extends out via the first connecting inclined slot 28 on the tensioning arm 18. When the bolt rod 20 and the internal thread cylinder 22 are loosened, the bolt rod 20 drives the socket ring 12 to move to the right, and the first connecting rod 13 on the socket ring 12 moves to the right along the first connecting inclined slot 28, so that the tensioning arm 18 rotates and closes with the pin shaft 23 as the center until the tensioning arm 18 and the right end limit convex block 19 retract into the side limit slot 15 (as Figure 5 and 7 shown); At this time, the right end of the piston rod 14 can be smoothly passed through the jack 301 on the transverse I-beam 3 to form a pre-installation of the transverse I-beam 3 and the piston rod 14; or the transverse I-beam 3 can be removed from the right end of the piston rod 14.

[0033] After the transverse I-beam 3 and the piston rod 14 are pre-installed, when the bolt rod 20 and the internal thread cylinder 22 are locked by the bolt head 21, the bolt rod 20 drives the socket ring 12 to move to the left, and the first connecting rod 13 on the socket ring 12 moves to the left along the first connecting inclined slot 28, so that the tensioning arm 18 rotates and opens with the pin shaft 23 as the center (as Figures 8-9 shown); The left end limit convex block 16 and the right end limit convex block 19 are respectively stuck at the left and right ends of the transverse I-beam 3.

[0034] After the bolt assembly on the limit locking quick-release component is locked and fixed, the right end of the limit locking quick-release component is expanded to realize the limit locking and fixing of the distribution beam. After the bolt assembly is loosened, the right end of the limit locking quick-release component is reduced to reserve space for the disassembly and pre-installation of the distribution beam.

[0035] The test bench 5 is provided with a self-locking and fixing component 9 for locking and fixing the steel pipe support frame component 7; The steel pipe support frame component 7 includes several groups of cross bars 72 and several groups of vertical bars 71 connected to the cross bars 72. The left end of the cross bar 72 extends into the steel groove on the vertical I-beam 6. Through such a limiting effect, the steel pipe support frame component 7 will not shake back and forth, improving safety.

[0036] The upper end of the test bench 5 is provided with a U-shaped groove 10. The middle part of the side wall of the U-shaped groove 10 is provided with a vertical slot 102, and the two sides of the side wall of the U-shaped groove 10 are provided with limit slots 101; The self-locking fixing assembly 9 includes a lifting plate 901 slidably connected to the corresponding U-shaped groove 10 and clamping plates 902 located on the left and right sides above the lifting plate 901; The sliding protrusion 906 on the side of the lifting plate 901 is slidably connected to the corresponding limiting slot 101, and the return spring 907 at the bottom of the lifting plate 901 is connected to the bottom of the U-shaped groove 10; A reserved slot 904 corresponding to the position of the vertical slot 102 is provided on the side of the lifting plate 901, and a second connecting rod 905 is provided inside the reserved slot 904; The bottom of the clamping plate 902 is provided with a vertical convex plate 903. The bottom of the vertical convex plate 903 is supported on the bottom of the U-shaped groove 10. The outside of the vertical convex plate 903 is located in the corresponding vertical slot 102, and the inside of the vertical convex plate 903 is located in the corresponding reserved slot 904; The second connecting rod 905 passes through and extends out via the second connecting inclined slot 908 on the vertical convex plate 903.

[0037] Lift the steel pipe support frame assembly 7 until the bottom of the vertical rod 71 is seated on the lifting plate 901. Under the action of the gravity of the steel pipe support frame assembly 7, the lifting plate 901 moves downward, and the second connecting rod 905 moves downward in the second connecting inclined slot 908, causing the vertical convex plate 903 to drive the clamping plate 902 at its upper end to move. The left and right groups of clamping plates 902 clamp the bottom of the vertical rod 71 of the steel pipe support frame assembly 7 to prevent it from moving or shaking during the test.

[0038] When the bottom of the steel pipe support frame assembly 7 contacts the top of the self-locking fixing assembly 9, under the action of the gravity of the steel pipe support frame assembly 7 itself, the self-locking fixing assembly 9 locks and fixes the bottom of the steel pipe support frame assembly 7; The piston rod 14 of the hydraulic cylinder 2 extends, causing the distribution beam to push the steel pipe support frame assembly 7 to simulate the load received laterally by the steel pipe support frame assembly 7.

[0039] Specifically, when in use: Installation and fixation: Connect the distribution beam to the piston rod 14 at the output end of the hydraulic cylinder 2 through the limit locking quick-release assembly. Specifically, after the bolt assembly is locked and fixed, the right end of the limit locking quick-release assembly is expanded to achieve the limit locking and fixation of the distribution beam.

[0040] Insert the bottom of the vertical I-beam 6 into the slot 11 on the moving seat 8, and finally fix the vertical I-beam 6 to the right end of the horizontal I-beam 3 using the locking bolt 29.

[0041] Place the steel pipe support frame assembly 7 on the self-locking fixing assembly 9 on the test bench 5. When the bottom of the steel pipe support frame assembly 7 contacts the top of the self-locking fixing assembly 9, under its own gravity, the self-locking fixing assembly 9 locks and fixes its bottom.

[0042] Simulation loading: Start the hydraulic cylinder 2, and its piston rod 14 extends to push the distribution beam. The distribution beam consists of a horizontal I-beam 3 and a vertical I-beam 6. Under the push of the piston rod 14, the distribution beam pushes the steel pipe support frame assembly 7. Since the rollers 801 of the moving seat 8 can move on the test bench 5 and the limit rod 4 limits the moving seat 8, the distribution beam can stably push the steel pipe support frame assembly 7, thus simulating the load received by the steel pipe support frame assembly 7 laterally.

[0043] The tester can thereby observe and measure various performance indicators of the steel pipe support frame assembly 7 under the action of the lateral load.

[0044] Measurement methods: Displacement measurement: Displacement sensors: Install displacement sensors at key positions of the steel pipe support frame assembly 7 (such as the top of the vertical rod 71, the midpoint of the horizontal rod 72, etc.), such as laser displacement sensors, linear variable differential transformers (LVDTs), etc. When the steel pipe support frame assembly 7 is subjected to a lateral load, the displacement sensors can measure the displacement changes of each part in the lateral direction in real time, thereby obtaining the lateral deformation of the steel pipe support frame assembly 7. For example, measure the displacement of the top of the vertical rod 71 relative to the bottom to evaluate the overall lateral displacement of the steel pipe support frame assembly 7.

[0045] Total station: The total station is a high-precision measuring instrument that can be used to measure the three-dimensional displacement of the steel pipe support frame assembly 7 under the action of a lateral load. By accurately measuring multiple measurement points, the tester can draw a deformation diagram of the steel pipe support frame assembly 7 and intuitively understand its deformation situation.

[0046] Force measurement: Force sensors: Install force sensors on the piston rod 14 of the hydraulic cylinder 2 to measure the magnitude of the lateral load applied by the hydraulic cylinder 2. At the same time, install force sensors at the connection between the steel pipe support frame assembly 7 and the distribution beam and other parts to measure the lateral force borne by the steel pipe support frame assembly 7. For example, measure the force at the connection between the horizontal rod 72 and the vertical rod 71 to understand the force condition of this part under the action of the lateral load.

[0047] Strain measurement: Paste strain gauges on the surfaces of the members of the steel pipe support frame assembly 7 (such as the horizontal rod 72 and the vertical rod 71). When the member is subjected to a lateral load, the resistance value of the strain gauge will change. The resistance change of the strain gauge can be measured through a strain acquisition instrument, and then the strain value of the member can be obtained. According to Hooke's law (stress = elastic modulus × strain), the tester can calculate the stress magnitude of the member and understand the stress distribution of the member under the action of the lateral load.

[0048] Angle measurement: Inclinometer: An inclinometer is installed on the vertical rod 71 and the horizontal rod 72 of the steel pipe support frame assembly 7 to measure the inclination angle of the rod under the action of lateral load. By measuring the angle change, the tester can evaluate the stability of the steel pipe support frame assembly 7. For example, if the inclination angle of the vertical rod 71 is too large, it may lead to a decrease in the overall stability of the steel pipe support frame assembly 7.

[0049] Strength performance indicators: Stress: The stress value calculated through strain measurement can reflect the strength performance of the steel pipe support frame assembly 7. When the stress exceeds the yield strength of the steel pipe material, the steel pipe will undergo plastic deformation; when the stress exceeds the tensile strength of the steel pipe material, the steel pipe will break. The tester can evaluate whether the strength of the steel pipe support frame assembly 7 meets the design requirements based on the measured stress value.

[0050] Ultimate bearing capacity: During the process of gradually increasing the lateral load, measure the load value when the steel pipe support frame assembly 7 fails, that is, the ultimate bearing capacity. The ultimate bearing capacity is an important indicator to measure the strength performance of the steel pipe support frame assembly 7, which reflects the maximum lateral load that the steel pipe support frame assembly 7 can withstand.

[0051] Stiffness performance indicators: Lateral displacement: The measured lateral displacement value can reflect the stiffness performance of the steel pipe support frame assembly 7. A smaller lateral displacement indicates that the steel pipe support frame assembly 7 has higher stiffness and can maintain better shape stability under the action of lateral load. For example, under a certain lateral load, the steel pipe support frame assembly 7 with a smaller lateral displacement has better stiffness than the one with a larger lateral displacement.

[0052] Stability performance indicators: Inclination angle: The inclination angle measured by the inclinometer can reflect the stability performance of the steel pipe support frame assembly 7. Under the action of lateral load, if the inclination angle of the steel pipe support frame assembly 7 is too large, it may lead to loss of stability and overturning. Therefore, the inclination angle is an important indicator to evaluate the stability of the steel pipe support frame assembly 7.

[0053] Deformation mode: Observe the deformation mode of the steel pipe support frame assembly 7 under the action of lateral load, such as the bending and torsion of the rods. Different deformation modes will affect the stability of the steel pipe support frame assembly 7, and the tester can evaluate the stability performance of the steel pipe support frame assembly 7 based on the deformation mode.

[0054] By measuring and analyzing the various performance indicators of the steel pipe support frame assembly 7 under the action of lateral load through the above measurement methods, the tester can comprehensively understand the performance of the steel pipe support frame assembly 7, providing a basis for its design, improvement, and optimization.

[0055] Disassembly and adjustment: When it is necessary to disassemble the distribution beam or perform pre-installation on it, loosen the bolt assembly to reduce the right end of the limit locking quick-release assembly, reserving space for the disassembly and pre-installation of the distribution beam. After the steel pipe support frame assembly 7 is removed, the self-locking fixing assembly 9 resets the lifting plate 901 through the return spring 907 for the next use.

[0056] Limit locking quick-release assembly: The bolt assembly is used in cooperation with the driving assembly. By controlling the tightening and loosening of the bolt rod 20, the opening and contraction of the right-end limiting member are realized, so as to conveniently and quickly connect and disassemble the distribution beam and the piston rod 14. At the same time, the reliability of the connection can be ensured, and it is ensured that there will be no loosening during the loading test.

[0057] Distribution beam: It is composed of a transverse I-beam 3 and a vertical I-beam 6. This structure has high strength and stiffness, can withstand the large thrust applied by the hydraulic cylinder 2, and evenly transmit the force to the steel pipe support frame assembly 7. The moving seat 8 at the bottom of the vertical I-beam 6 contacts the test bench 5 through the roller 801, reducing the friction during movement and making the distribution beam move more smoothly when pushing the steel pipe support frame assembly 7.

[0058] Self-locking fixing assembly: It realizes automatic locking by using the self-weight of the steel pipe support frame assembly 7, and the structure is simple, stable and reliable. The lifting plate 901 cooperates with the limit slot 101 through the sliding protrusion 906 to ensure the stability of the lifting of the lifting plate 901. The return spring 907 can automatically reset the lifting plate 901 after the steel pipe support frame assembly 7 is removed. The clamping plate 902 is connected to the lifting plate 901 and the U-shaped groove 10 through the vertical convex plate 903. Under the action of the gravity of the steel pipe support frame assembly 7, the second connecting rod 905 moves in the second connecting inclined groove 908, so that the clamping plate 902 clamps the bottom of the steel pipe support frame assembly 7 to prevent its bottom from moving or shaking during the test.

[0059] Test bench: The U-shaped groove 10 on the test bench 5 provides an installation position for the self-locking fixing assembly 9. The vertical slot 102 and the limit slot 101 on its side wall respectively provide guidance and limitation for the movement of the clamping plate 902 and the lifting plate 901, ensuring the stability and reliability of the operation of the self-locking fixing assembly 9.

[0060] 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 spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lateral loading test device for a large steel pipe support frame structure, comprising a test bench and a side mounting frame vertically fixed at one end of the test bench, characterized in that: The side mounting frame is provided with a plurality of groups of hydraulic cylinders, and the piston rods at the output ends of the hydraulic cylinders are fixedly connected to the distribution beams by means of a limit locking quick-release assembly; After the bolt assembly on the limit locking quick release assembly is locked and fixed, the right end of the limit locking quick release assembly is expanded to achieve the limit locking and fixing of the distribution beam. After the bolt assembly is loosened, the right end of the limit locking quick release assembly is reduced to reserve space for the disassembly and pre-installation of the distribution beam. The test bench is provided with a self-locking fixing assembly for locking and fixing the steel pipe support frame assembly. When the bottom of the steel pipe support frame assembly contacts the top of the self-locking fixing assembly, the self-locking fixing assembly locks and fixes the bottom of the steel pipe support frame assembly under the action of the gravity of the steel pipe support frame assembly itself; The piston rod of the hydraulic cylinder extends to enable the distribution beam to push the steel pipe support frame assembly, simulating the lateral load on the steel pipe support frame assembly.

2. A lateral loading test device for a large steel pipe support frame structure according to claim 1, characterized in that: The distribution beam comprises a plurality of groups of transverse I-beams distributed at equal intervals and a plurality of groups of vertical I-beams fixed to the transverse I-beams by means of locking bolts.

3. A lateral loading test device for a large steel pipe support frame structure according to claim 2, characterized in that: A moving seat is provided at the bottom of the vertical I-beam, a slot for inserting the vertical I-beam is provided at the upper end of the moving seat, and a roller is provided at the bottom of the moving seat, and the roller is located on the upper end surface of the test bench.

4. A lateral loading test device for a large steel pipe support frame structure according to claim 3, characterized in that: The left end of the movable seat is provided with two groups of limiting rods, and the limiting rods extend through the side mounting frame.

5. The lateral loading test device for a large steel pipe support frame structure according to claim 2, characterized in that: The right end of the piston rod is provided with side limit grooves at equal intervals; The limit locking quick release assembly comprises a left-end limit piece fixed at the left end between the plurality of groups of side limit grooves and a right-end limit piece movably connected at equal intervals to the right end of the left-end limit piece; The right end limit piece is connected with the bolt assembly by a driving assembly. After the right end of the piston rod extends through the socket on the transverse I-beam and the bolt assembly is locked with the middle part of the left end limit piece, the driving assembly drives the right end limit piece to open and expand, so that the left end limit piece and the right end limit piece are respectively limited and locked and fixed at the left and right ends of the transverse I-beam.

6. A lateral loading test device for a large steel pipe support frame structure according to claim 5, characterized in that: The left end limiter comprises a disc, a left end limiter protrusion arranged at equal intervals on the side of the disc, an internal threaded cylinder fixed in the middle of the right end of the disc, and a connecting ear plate arranged at the right end of the left end limiter protrusion; The left end limiting protrusion extends through the corresponding side limiting groove; The right end stopper comprises a tensioning arm movably connected to the connecting ear plate by a pin shaft and a right end stopper protrusion arranged on the outer side of the right end of the tensioning arm; The bolt assembly comprises a bolt rod threadedly connected to the internal threaded barrel and a bolt head fixed at the right end of the bolt rod; The driving assembly comprises a left stop ring and a right stop ring sleeved and fixed on the bolt rod, a sleeve ring sleeved on the bolt rod, and vertical ears arranged at equal intervals on the sides of the sleeve ring; The sleeve ring is located between the left limiting ring and the right limiting ring, and the first connecting rod between the vertical ears extends through the first connecting inclined groove on the tensioning arm.

7. The lateral loading test device for a large steel pipe support frame structure according to claim 2, characterized in that: The steel pipe support frame assembly includes a plurality of groups of cross bars and a plurality of groups of vertical bars connected to the cross bars, and the left end of the cross bar extends into the steel groove on the vertical I-beam.

8. The lateral loading test device for a large steel pipe support frame structure according to claim 1, characterized in that: The upper end of the test bench is provided with a U-shaped groove, the middle part of the side wall of the U-shaped groove is provided with a vertical groove, and both sides of the side wall of the U-shaped groove are provided with limit grooves; The self-locking fixing assembly includes a lifting plate slidably connected in the corresponding U-shaped groove and clamping plates located on the left and right sides above the lifting plate; The sliding protrusion on the side of the lifting plate is slidably connected in the corresponding limiting groove, and the return spring at the bottom of the lifting plate is connected to the bottom of the U-shaped groove; The side of the lifting plate is provided with a reserved slot corresponding to the vertical slot position, and a second connecting rod is provided inside the reserved slot; A vertical convex plate is provided at the bottom of the clamping plate, the bottom of the vertical convex plate is supported on the bottom of the U-shaped groove, the outer side of the vertical convex plate is located in the corresponding vertical slot, and the inner side of the vertical convex plate is located in the corresponding reserved slot; The second connecting rod extends through the second connecting inclined slot on the vertical convex plate.

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