Lateral loading test device for large steel pipe support structures

Abstract

The present invention relates to the technical field of lateral loading test of steel pipe support frames, and discloses a lateral loading test device for large steel pipe support frame structures, wherein a plurality of groups of hydraulic cylinders are provided on a side mounting frame, and the piston rods at the output ends of the hydraulic cylinders are fixedly connected to a distribution beam by a limit locking quick release assembly; a self-locking fixing assembly for locking and fixing the steel pipe support frame assembly is provided on the test bench, and the present invention can realize the rapid assembly or disassembly of the distribution beam and the piston rod by setting the limit locking quick release assembly, which is conducive to meeting the adaptation of steel pipe support frame assemblies of different sizes to distribution beams of corresponding sizes. When the bottom of the steel pipe support frame assembly contacts the top of the self-locking fixing assembly, under the action of the gravity of the steel pipe support frame assembly itself, the self-locking fixing assembly locks and fixes the bottom of the steel pipe support frame assembly, thereby quickly fixing the steel pipe support frame assembly and preventing the bottom of the steel pipe support frame assembly from moving or shaking during the test.

Description

Technical Field

[0001] The invention relates to the technical field of lateral loading test of steel pipe support frames, in particular to a lateral loading test device for a large steel pipe support frame structure. Background Art

[0002] There are several important reasons for conducting lateral loading tests on steel pipe supports:

[0003] Stability assessment: In actual use, steel pipe supports may be subject to lateral forces such as wind, horizontal impact during construction, and lateral pressure during concrete pouring. Lateral loading tests can simulate these actual working conditions and assess the stability of the support frame under lateral forces, verifying its ability to maintain structural integrity and load-bearing capacity, preventing lateral instability and damage, and ensuring construction safety.

[0004] Verifying Connection Performance: Steel pipe supports are assembled from numerous steel pipes through various connection methods. Lateral loading tests can verify the performance of these connections under lateral forces, including their strength, stiffness, and reliability. Defective or inadequate connections can loosen, slip, or even fail under lateral loading, compromising the load-bearing capacity and stability of the entire support. Testing can identify connection problems so that appropriate improvements can be implemented to improve connection quality.

[0005] Determining Mechanical Performance Parameters: Lateral loading tests reveal the stress, strain distribution, and deformation patterns of the steel pipe support frame under lateral forces. These parameters are crucial for accurately assessing the support frame's load-bearing capacity, conducting structural design, and performing safety verification. Based on the actual parameters obtained from the tests, designers can optimize the support frame structure to achieve a more economical and reasonable design while still meeting safety requirements.

[0006] Verify design theories and methods: Lateral loading test results can be compared with predictions from design theories and calculation methods to verify their correctness and accuracy. If there is a significant deviation between the test results and the design predictions, the design theories and methods need to be revised and improved, thereby improving the reliability and scientific nature of the steel pipe support design and providing a more reliable basis for future engineering designs.

[0007] Compliance with specifications and standards: In fields such as construction, relevant specifications and standards impose strict requirements on the design, construction, and acceptance of steel pipe support frames. Lateral loading tests are a key method for verifying whether steel pipe support frames comply with these specifications and standards. Only after these requirements have been proven through testing can they be put into practical use, ensuring that project quality and construction safety meet national and industry standards.

[0008] Existing testing equipment for lateral loading tests on steel pipe support frames has numerous shortcomings. Some devices lack efficient and convenient assembly and disassembly mechanisms for connecting the distribution beam to the piston rod, making it difficult to quickly adapt to different-sized steel pipe support frame components. This results in lengthy test preparation and adjustments, impacting test efficiency. Furthermore, existing connection structures struggle to ensure the distribution beam remains stable and stable when lateral loads are applied, creating the risk of loose connections and beam offset, leading to inaccurate and unreliable test data.

[0009] Furthermore, traditional methods for securing steel pipe support frame components are cumbersome and inefficient, and can cause the bottom of the components to shift or wobble during testing. This not only disrupts the test process but can also cause safety issues and prevent the test from providing a stable and reliable foundation. To address this, we developed a lateral loading test device for large steel pipe support frame structures. Summary of the Invention

[0010] The object of the present invention is to provide a lateral loading test device for a large steel pipe support frame structure to solve the problems raised in the above background technology.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A lateral loading test device for a large steel pipe support frame structure includes a test bench and a side mounting frame fixed vertically at one end of the test bench. The side mounting frame is provided with a plurality of hydraulic cylinders. The piston rods at the output ends of the hydraulic cylinders are fixedly connected to the distribution beam using a limit locking quick-release assembly.

[0013] 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 limit locking and fixation 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 disassembly and pre-installation of the distribution beam.

[0014] 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;

[0015] The piston rod of the hydraulic cylinder extends, causing the distribution beam to push the steel pipe support frame assembly, simulating the lateral load on the steel pipe support frame assembly.

[0016] Preferably, the distribution beam includes 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 using locking bolts.

[0017] Preferably, a movable 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 movable seat, and a roller is provided at the bottom of the movable seat, and the roller is located on the upper end surface of the test bench.

[0018] 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.

[0019] Preferably, the right end of the piston rod is provided with side limiting grooves at equal intervals;

[0020] The limit locking quick release assembly includes a left end limiter fixed at the left end between the plurality of side limit slots and a right end limiter movably connected to the right end of the left end limiter at equal intervals;

[0021] 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 horizontal 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 horizontal I-beam.

[0022] Preferably, the left end limiting member includes a disc, left end limiting protrusions 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;

[0023] The left end limiting protrusion extends through the corresponding side limiting groove;

[0024] The right end limiter comprises a tensioning arm movably connected to the connecting ear plate by a pin shaft and a right end limiter protrusion arranged on the outer side of the right end of the tensioning arm;

[0025] The bolt assembly includes a bolt rod threadedly connected to the internal threaded barrel and a bolt head fixed at the right end of the bolt rod;

[0026] The driving assembly includes a left limiting ring and a right limiting 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;

[0027] 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 slot on the tensioning arm.

[0028] Preferably, the steel pipe support frame assembly includes several groups of cross bars and several 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.

[0029] 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;

[0030] The self-locking fixing assembly includes a lifting plate that is slidably connected to the corresponding U-shaped groove and clamping plates located on the left and right sides above the lifting plate;

[0031] The sliding protrusions on the side of the lifting plate slide into the corresponding limiting slots, and the return spring at the bottom of the lifting plate is connected to the bottom of the U-shaped slot;

[0032] The side of the lifting plate is provided with a reserved slot corresponding to the position of the vertical slot, and a second connecting rod is provided inside the reserved slot;

[0033] 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;

[0034] The second connecting rod extends through the second connecting inclined slot on the vertical protruding plate.

[0035] Compared with the prior art, the beneficial effect of the present invention is that the present invention can realize the rapid assembly or disassembly of the distribution beam and the piston rod through the setting of the limit locking quick-release assembly, which is conducive to the adaptation of steel pipe support frame assemblies of different sizes and distribution beams of corresponding sizes.

[0036] After the distribution beam and the piston rod are assembled by the limit locking quick release assembly, the limit locking quick release assembly forms a limit locking fixation for the distribution beam, which can ensure the fastening of the distribution beam and ensure that the distribution beam will not deflect when a lateral load is applied to the steel pipe support frame assembly.

[0037] 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 its own gravity, which can quickly fix the steel pipe support frame assembly and prevent the bottom of the steel pipe support frame assembly from moving or shaking during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention as a whole;

[0039] Figure 2 A second three-dimensional structural diagram of the present invention as a whole;

[0040] Figure 3 This is a schematic diagram of the exploded structure of the installation of the transverse I-beam and the piston rod of the present invention;

[0041] Figure 4 This is a schematic diagram of the exploded structure of the position-limiting locking quick-release assembly and the piston rod installation of the present invention;

[0042] Figure 5 This is a structural diagram of the right-end limiting protrusion of the present invention when it is closed and shrunk;

[0043] Figure 6 This is a schematic diagram of the exploded structure of the connection between the right end limiter, the drive assembly and the bolt assembly of the present invention;

[0044] Figure 7 This is a schematic structural diagram of the right end of the position-limiting locking quick-release assembly of the present invention when it is reduced;

[0045] Figure 8 It is a structural schematic diagram of the right end of the position-limiting locking quick-release assembly of the present invention when it is enlarged;

[0046] Figure 9 This is a schematic diagram of the structure of the position-limiting locking quick-release assembly of the present invention fixing the transverse I-beam and the piston rod;

[0047] Figure 10 It is a schematic diagram of the exploded structure of the overall assembly of the present invention;

[0048] Figure 11 Schematic diagram of the exploded structure of the self-locking fixing assembly of the present invention;

[0049] Figure 12 This is a schematic diagram of the structure of the self-locking fixing assembly of the present invention after being assembled with the test bench;

[0050] Figure 13 For the present invention Figure 12 Schematic diagram of the cross-sectional structure;

[0051] Figure 14 This is a structural diagram of the self-locking fixing assembly of the present invention clamping and fixing the steel pipe support frame assembly;

[0052] Figure 15 For the present invention Figure 14 Schematic diagram of the cross-sectional structure.

[0053] Figure: 1, side mounting frame; 2, hydraulic cylinder; 3, horizontal I-beam; 301, socket; 4, limit rod; 5, test bench; 6, vertical I-beam; 7, steel pipe support frame assembly; 71, vertical pole; 72, horizontal bar; 8, moving seat; 801, roller; 9, self-locking fixing assembly; 901, lifting plate; 902, clamping plate; 903, vertical protruding plate; 904, reserved slot; 905, second connecting rod; 906, sliding protrusion; 907, return spring; 908, second connecting inclined slot; 1 0. U-shaped groove; 101. Limiting groove; 102. Vertical groove; 11. Slot; 12. Socket ring; 13. First connecting rod; 14. Piston rod; 15. Side limiting groove; 16. Left end limiting protrusion; 17. Disc; 18. Tensioning arm; 19. Right end limiting protrusion; 20. Bolt rod; 21. Bolt head; 22. Internally threaded barrel; 23. Pin; 24. Connecting ear plate; 25. Left limiting ring; 26. Right limiting ring; 27. Vertical ear; 28. First connecting bevel groove; 29. Locking bolt. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] Example:

[0056] See also Figure 1-15 , the present invention provides a technical solution:

[0057] A lateral loading test device for a large steel pipe support frame structure includes a test bench 5 and a side mounting frame 1 vertically fixed at one end of the test bench 5. The side mounting frame 1 is provided with a plurality of groups of hydraulic cylinders 2. The piston rods 14 at the output ends of the hydraulic cylinders 2 are fixedly connected to the distribution beam using a limit locking quick-release assembly.

[0058] The distribution beam includes a plurality of groups of horizontal I-beams 3 distributed at equal intervals and a plurality of groups of vertical I-beams 6 fixed to the horizontal I-beams 3 by means of locking bolts 29 .

[0059] A movable seat 8 is provided at the bottom of the vertical I-beam 6 , and a slot 11 for inserting the vertical I-beam 6 is provided at the upper end of the movable seat 8 . A roller 801 is provided at the bottom of the movable seat 8 , and the roller 801 is located on the upper end surface of the test bench 5 .

[0060] Such a movable seat 8 can slide smoothly along the upper end surface of the test bench 5 through the rollers 801, thereby ensuring that the distribution beam moves left and right smoothly and stably.

[0061] Two sets of limiting rods 4 are provided at the left end of the movable seat 8 , and the limiting rods 4 extend through the side mounting frame 1 .

[0062] The limiting rod 4 can prevent the movable seat 8 from deflecting, thereby ensuring the accuracy of the load direction of the distribution beam on the side of the steel pipe support frame assembly 7.

[0063] The right end of the piston rod 14 is provided with side limiting grooves 15 at equal intervals;

[0064] The limit locking quick release assembly includes a left end limiter fixed at the left end between the plurality of side limit slots 15 and a right end limiter movably connected to the right end of the left end limiter at equal intervals;

[0065] The right end limiter is connected with the bolt assembly by a driving assembly. After the right end of the piston rod 14 extends through the socket 301 on the transverse I-beam 3, and the bolt assembly is locked with the middle part of the left end limiter, the driving assembly drives the right end limiter to open and expand, so that the left end limiter and the right end limiter are respectively limited and locked and fixed at the left and right ends of the transverse I-beam 3.

[0066] The left end limit member includes a disc 17, left end limit protrusions 16 arranged at equal intervals on the side of the disc 17, an internal threaded cylinder 22 fixed to the middle of the right end of the disc 17, and a connecting ear plate 24 arranged at the right end of the left end limit protrusion 16;

[0067] The left end limiting protrusion 16 extends through the corresponding side limiting groove 15;

[0068] The right end limiter comprises a tensioning arm 18 movably connected to the connecting ear plate 24 by a pin 23 and a right end limiter protrusion 19 provided on the outer side of the right end of the tensioning arm 18;

[0069] The bolt assembly includes a bolt rod 20 threadedly connected to the internal threaded barrel 22 and a bolt head 21 fixed to the right end of the bolt rod 20; the bolt head 21 is rotated by a wrench to lock the bolt rod 20 and the internal threaded barrel 22, and the bolt head 21 is close to the right end surface of the piston rod 14.

[0070] The driving assembly includes a left limiting ring 25 and a right limiting ring 26 which are sleeved and fixed on the bolt rod 20, a sleeve ring 12 which is sleeved on the bolt rod 20, and vertical ears 27 which are evenly spaced on the sides of the sleeve ring 12;

[0071] The sleeve ring 12 is located between the left limiting ring 25 and the right limiting ring 26, so that the sleeve ring 12 can be ensured not to rotate when the bolt rod 20 rotates, and the left limiting ring 25 and the right limiting ring 26 can drive the sleeve ring 12 to move forward and backward with the bolt rod 20.

[0072] The first connecting rod 13 between the vertical ears 27 extends through the first connecting bevel 28 on the tensioning arm 18. When the bolt rod 20 and the internal threaded barrel 22 are loosened, the bolt rod 20 drives the sleeve ring 12 to move rightward, and the first connecting rod 13 on the sleeve ring 12 moves rightward along the first connecting bevel 28, thereby causing the tensioning arm 18 to rotate and close around the pin 23 as the center of the circle until the tensioning arm 18 and the right end limit protrusion 19 are retracted into the side limit groove 15 (as shown in FIG. Figure 5 and 7 shown);

[0073] At this time, the right end of the piston rod 14 can be smoothly extended through the insertion hole 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.

[0074] After the transverse I-beam 3 and the piston rod 14 are pre-installed, when the bolt rod 20 is locked with the internal threaded barrel 22 by the bolt head 21, the bolt rod 20 drives the sleeve ring 12 to move leftward, and the first connecting rod 13 on the sleeve ring 12 moves leftward along the first connecting inclined groove 28, thereby causing the tensioning arm 18 to rotate and open with the pin shaft 23 as the center (as shown in FIG. Figure 8-9 shown);

[0075] The left end limiting protrusion 16 and the right end limiting protrusion 19 are respectively clamped on the left and right ends of the transverse I-beam 3.

[0076] 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 fixation 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.

[0077] The test bench 5 is provided with a self-locking fixing assembly 9 for locking and fixing the steel pipe support frame assembly 7;

[0078] The steel pipe support frame assembly 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 this limiting effect, the steel pipe support frame assembly 7 will not shake back and forth, thereby improving safety.

[0079] A U-shaped groove 10 is provided at the upper end of the test bench 5, a vertical groove 102 is provided in the middle of the side wall of the U-shaped groove 10, and limiting grooves 101 are provided on both sides of the side wall of the U-shaped groove 10;

[0080] The self-locking fixing assembly 9 includes a lifting plate 901 that is 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;

[0081] The sliding protrusion 906 on the side of the lifting plate 901 slides into 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 slot 10;

[0082] 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;

[0083] A vertical protrusion 903 is provided at the bottom of the clamping plate 902. The bottom of the vertical protrusion 903 is supported on the bottom of the U-shaped groove 10. The outer side of the vertical protrusion 903 is located in the corresponding vertical slot 102, and the inner side of the vertical protrusion 903 is located in the corresponding reserved slot 904.

[0084] The second connecting rod 905 extends through the second connecting inclined slot 908 on the vertical protruding plate 903 .

[0085] The steel pipe support frame assembly 7 is hoisted until the bottom of the vertical rod 71 is placed on the lifting plate 901. Under the action of 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 groove 908, so that the vertical protrusion 903 drives the clamping plate 902 at its upper end to move. The left and right sets 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.

[0086] When the bottom of the steel pipe support frame assembly 7 contacts the top of the self-locking fixing assembly 9, the self-locking fixing assembly 9 locks and fixes the bottom of the steel pipe support frame assembly 7 under the action of its own gravity;

[0087] The piston rod 14 of the hydraulic cylinder 2 extends, causing the distribution beam to push the steel pipe support frame assembly 7, simulating the lateral load on the steel pipe support frame assembly 7.

[0088] Specifically, when using:

[0089] 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 limit locking and fixation of the distribution beam.

[0090] Insert the bottom of the vertical I-beam 6 into the slot 11 on the movable seat 8 , and finally use the locking bolt 29 to fix the vertical I-beam 6 to the right end of the horizontal I-beam 3 .

[0091] The steel pipe support frame assembly 7 is placed on the self-locking fixing assembly 9 on the test bench 5. After the bottom of the steel pipe support frame assembly 7 contacts the top of the self-locking fixing assembly 9, the self-locking fixing assembly 9 locks and fixes its bottom under the action of its own gravity.

[0092] Simulated loading: Hydraulic cylinder 2 is activated, and its piston rod 14 extends, pushing the distribution beam. The distribution beam is composed of transverse I-beam 3 and vertical I-beam 6. Driven by piston rod 14, the distribution beam pushes the steel pipe support frame assembly 7. Because the rollers 801 of the movable base 8 are movable on the test bench 5 and the limit rod 4 limits the movable base 8, the distribution beam can stably push the steel pipe support frame assembly 7, thereby simulating the lateral load on the steel pipe support frame assembly 7.

[0093] The test personnel can use this to observe and measure various performance indicators of the steel pipe support frame assembly 7 under the action of lateral load.

[0094] Measurement method:

[0095] Displacement measurement:

[0096] Displacement Sensors: Displacement sensors, such as laser displacement sensors or linear variable differential transformers (LVDTs), are installed at key locations on the steel tube support frame assembly 7 (e.g., the tops of the vertical bars 71 and the midpoints of the horizontal bars 72). When the steel tube support frame assembly 7 is subjected to lateral loads, the displacement sensors can measure the lateral displacement of various locations in real time, thereby determining the lateral deformation of the steel tube support frame assembly 7. For example, the displacement of the top of the vertical bar 71 relative to the bottom can be measured to assess the overall lateral displacement of the steel tube support frame assembly 7.

[0097] Total Station: A total station is a high-precision measuring instrument used to measure the three-dimensional displacement of the steel pipe support frame assembly 7 under lateral load. By accurately measuring multiple measurement points, testers can create a deformation map of the steel pipe support frame assembly 7, providing a visual understanding of its deformation.

[0098] Force measurement:

[0099] Force sensor: A force sensor is installed on the piston rod 14 of hydraulic cylinder 2 to measure the lateral load applied by the hydraulic cylinder 2. Force sensors are also installed at locations such as the connection between the steel pipe support frame assembly 7 and the distribution beam to measure the lateral force acting on the steel pipe support frame assembly 7. For example, the force at the connection between the crossbar 72 and the vertical bar 71 is measured to understand the stress at this location under lateral load.

[0100] Strain Measurement: Strain gauges are attached to the surfaces of the steel pipe support frame assembly 7 (such as crossbars 72 and vertical bars 71). When the bars are subjected to lateral loads, the resistance of the strain gauges changes. This change in resistance is measured using a strain gauge, which provides the strain value of the bars. Based on Hooke's law (stress = elastic modulus × strain), testers can calculate the stress in the bars and understand the stress distribution under lateral loads.

[0101] Angle measurement:

[0102] Inclinometers are installed on the vertical rods 71 and horizontal rods 72 of the steel pipe support frame assembly 7 to measure the tilt angle of the rods under lateral loads. By measuring the change in angle, testers can assess the stability of the steel pipe support frame assembly 7. For example, if the tilt angle of the vertical rod 71 is too large, the overall stability of the steel pipe support frame assembly 7 may be reduced.

[0103] Strength performance indicators:

[0104] Stress: The stress value calculated through strain measurement reflects 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 fracture. The measured stress value allows testers to assess whether the strength of the steel pipe support frame assembly 7 meets the design requirements.

[0105] Ultimate bearing capacity: The load at which the steel pipe support frame assembly 7 fails, measured as the lateral load gradually increases. Ultimate bearing capacity is a key indicator of the strength of the steel pipe support frame assembly 7, reflecting the maximum lateral load it can withstand.

[0106] Stiffness performance index:

[0107] Lateral displacement: The measured lateral displacement value can reflect the stiffness performance of the steel tube support frame assembly 7. A smaller lateral displacement indicates that the steel tube support frame assembly 7 has higher stiffness and is able to maintain good shape stability under lateral loads. For example, under a certain lateral load, a steel tube support frame assembly 7 with smaller lateral displacement has greater stiffness than a steel tube support frame assembly 7 with larger lateral displacement.

[0108] Stability performance indicators:

[0109] Tilt angle: The tilt angle measured by the inclinometer reflects the stability of the steel pipe support frame assembly 7. Under lateral loads, excessive tilt angles can cause the steel pipe support frame assembly 7 to lose stability and tip over. Therefore, the tilt angle is an important indicator for evaluating the stability of the steel pipe support frame assembly 7.

[0110] Deformation Mode: Observe the deformation mode of the steel tube support frame assembly 7 under lateral load, such as bending and torsion of the rods. Different deformation modes will affect the stability of the steel tube support frame assembly 7. Testers can evaluate the stability performance of the steel tube support frame assembly 7 based on the deformation mode.

[0111] By measuring and analyzing various performance indicators of the steel pipe support frame assembly 7 under lateral load using the above-mentioned measurement method, testers can fully understand the performance of the steel pipe support frame assembly 7 and provide a basis for its design, improvement and optimization.

[0112] Disassembly and Adjustment: When disassembling or pre-installing the distribution beam, loosen the bolt assembly to reduce the right end of the limit lock quick-release assembly, leaving space for disassembly and pre-installation of the distribution beam. After the self-locking fixing assembly 9 is removed from the steel pipe support frame assembly 7, the return spring 907 resets the lifting plate 901 for the next use.

[0113] Limit locking quick-release assembly: The bolt assembly and the drive assembly are combined to control the tightening and loosening of the bolt rod 20 to achieve the opening and contraction of the right end limiter, thereby conveniently and quickly achieving the connection and disassembly of the distribution beam and the piston rod 14, while ensuring the reliability of the connection and ensuring that it will not loosen during the loading test.

[0114] Distribution beam: Composed of transverse I-beams 3 and vertical I-beams 6, this structure offers high strength and rigidity, capable of withstanding the substantial thrust exerted by hydraulic cylinders 2 and evenly transmitting that force to the steel pipe support frame assembly 7. The movable base 8 at the bottom of the vertical I-beam 6 contacts the test bench 5 via rollers 801, reducing friction during movement and enabling the distribution beam to push the steel pipe support frame assembly 7 more smoothly.

[0115] Self-locking fixing assembly: Automatic locking is achieved by utilizing the weight of the steel pipe support frame assembly 7, resulting in a simple, stable, and reliable structure. The lifting plate 901 cooperates with the limiting slot 101 via the sliding protrusion 906 to ensure the stability of the lifting plate 901. The reset spring 907 automatically resets 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 slot 10 via the vertical protrusion 903. Under the action of the weight of the steel pipe support frame assembly 7, the second connecting rod 905 moves within the second connecting bevel 908, causing the clamping plate 902 to clamp the bottom of the steel pipe support frame assembly 7, preventing it from moving or shaking at the bottom during testing.

[0116] Test bench: The U-shaped groove 10 on the test bench 5 provides an installation position for the self-locking fixing component 9. The vertical groove 102 and the limit groove 101 on its side wall provide guidance and limiting functions for the movement of the clamping plate 902 and the lifting plate 901, respectively, ensuring the stability and reliability of the self-locking fixing component 9.

[0117] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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 fixed vertically at one end of the test bench, characterized in that: The side mounting frame is provided with a plurality of hydraulic cylinders, and the piston rods at the output ends of the hydraulic cylinders are fixedly connected to the distribution beams by using 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 limit locking and fixation 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 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, causing the distribution beam to push the steel pipe support frame assembly, simulating the lateral load on the steel pipe support frame assembly; The distribution beam includes a plurality of groups of horizontal I-beams distributed at equal intervals and a plurality of groups of vertical I-beams fixed to the horizontal I-beams by locking bolts; The right end of the piston rod is provided with side limiting grooves at equal intervals; The limit locking quick release assembly includes a left end limiter fixed at the left end between the plurality of side limit slots and a right end limiter movably connected to the right end of the left end limiter at equal intervals; The right end limiter is connected to the bolt assembly by a driving assembly. When the right end of the piston rod extends through the jack on the transverse I-beam, and the bolt assembly is locked with the middle part of the left end limiter, the driving assembly drives the right end limiter to open and expand, so that the left end limiter and the right end limiter are respectively locked and fixed at the left and right ends of the transverse I-beam. The left end limiting member includes a disc, left end limiting protrusions 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 limiter comprises a tensioning arm movably connected to the connecting ear plate by a pin shaft and a right end limiter protrusion arranged on the outer side of the right end of the tensioning arm; The bolt assembly includes 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 includes a left limiting ring and a right limiting 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 slot on the tensioning arm.

2. A lateral loading test device for a large steel pipe support structure according to claim 1, characterized in that: A movable 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 movable seat, and a roller is provided at the bottom of the movable seat, which is located on the upper end surface of the test bench.

3. The lateral loading test device for a large steel pipe support structure according to claim 2, 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.

4. The lateral loading test device for a large steel pipe support structure according to claim 1, characterized in that: The steel pipe support frame assembly includes several groups of cross bars and several groups of vertical bars connected to the cross bars. The left end of the cross bar extends into the steel groove on the vertical I-beam.

5. The lateral loading test device for a large steel pipe support 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 that is slidably connected to the corresponding U-shaped groove and clamping plates located on the left and right sides above the lifting plate; The sliding protrusions on the side of the lifting plate slide into the corresponding limiting slots, and the return spring at the bottom of the lifting plate is connected to the bottom of the U-shaped slot; The side of the lifting plate is provided with a reserved slot corresponding to the position of the vertical slot, 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 protruding plate.

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