End limiting device for preventing fatigue loading dislocation and overturning of test beam

Abstract

The invention discloses an end limiting device for preventing fatigue loading dislocation and overturning of a test beam, and belongs to the technical field of structural engineering test, and the end limiting device comprises base modules which are used for placing the test beam and are arranged at the two ends of the test beam; the lateral baffle modules are fixedly connected to the two sides of the base module in pairs and are arranged on the two sides of the test beam; the antifriction module is fixedly connected to one side, close to the test beam, of the lateral baffle module and is in rolling contact with the test beam; the transverse baffle plate module is fixedly connected between the two lateral baffle plate modules through the connecting module and is over against the test beam; one end of the transverse contact module is fixedly connected to the side, close to the test beam, of the transverse baffle module, and the other end faces the test beam and abuts against the test beam; the end, abutting against the test beam, of the transverse contact module can rotate in a pitching mode relative to the transverse baffle module. The base is used for bearing, lateral friction reduction and resistance reduction are achieved, deformation and slippage are limited, transverse torsion and overturning are prevented, the old problem is solved, and stability is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of structural engineering test, and particularly relates to an end limiting device for preventing fatigue loading dislocation and overturning of a test beam. BACKGROUND

[0002] In the technical field of structural engineering test, especially in the fatigue performance research of bridges, buildings and mechanical components, the fatigue loading test of beam test pieces (hereinafter referred to as “test beams”) is the core means for evaluating the long-term load stability and service life of components. Such a test needs to simulate the cyclic load borne by the component in the actual service process, and requires the test beam to remain stable in position during the process of high-cycle fatigue for millions of times or low-cycle fatigue for tens of thousands of times, so as to avoid test interruption caused by lateral slip, torsion or overturning instability, or to avoid the introduction of additional interference due to improper constraint, and thus to affect the authenticity and reliability of the test data.

[0003] At present, the positioning constraint of the test beam in the industry mainly adopts three types: first, relying on the weight of the test beam to achieve natural positioning, which does not require additional limiting structure, but for light test beams or high-span ratio test beams, the constraint force generated by the self-weight is insufficient, and cumulative lateral dislocation is easy to occur under the action of cyclic load, which is difficult to meet the stability requirement of long-term test; second, using the edge guardrails or auxiliary components of the test bench for indirect constraint, such a constraint method lacks pertinence and cannot accurately act on the potential instability key area of the end of the test beam, and the bench structure is fixed, which is difficult to adapt to test beams of different sizes and different loading conditions, and has poor universality; third, using a simple rigid block to directly abut against the side or end of the test beam, which can provide certain lateral constraint, but the rigid sliding contact between the block and the beam body on the one hand excessively limits the necessary longitudinal expansion and vertical deflection deformation of the test beam during loading, and on the other hand generates large harmful friction, which interferes with the real stress state of the beam body, leading to distorted test data, and the rigid block is inconvenient to adjust and is easy to displace or damaged under the impact of large load, further increasing the risk of test interruption.

[0004] In summary, the existing fatigue loading positioning technology of the test beam generally has defects such as insufficient constraint reliability, poor adaptability, large friction interference or structure failure, which cannot meet the core needs of “allowing necessary deformation of the beam body”, “precise constraint of instability trend” and “guaranteeing long-term test continuity”, seriously affecting the reliability of the fatigue test results and restricting the depth and precision of the fatigue performance research of components in the field of structural engineering. Therefore, it has become a technical problem to be solved in the industry to develop a test beam end limiting device that can accurately position, has low friction interference, high adaptability and long-term stability. SUMMARY

[0005] To solve the above technical problems, the application provides an end limiting device for preventing fatigue loading dislocation and overturning of a test beam.

[0006] To achieve the above object, the application provides an end limiting device for preventing fatigue loading dislocation and overturning of a test beam, which comprises:

[0007] a base module for placing the test beam and arranged at two ends of the test beam;

[0008] a lateral baffle module fixedly connected to two sides of the base module and arranged at two sides of the test beam;

[0009] a friction-reducing module fixedly connected to one side of the lateral baffle module close to the test beam and in rolling contact with the test beam;

[0010] a transverse baffle module fixedly connected between the two lateral baffle modules through a connecting module and facing the test beam;

[0011] a transverse contact module having one end fixedly connected to one side of the transverse baffle module close to the test beam and the other end facing the test beam and in abutment with the test beam; wherein the abutment end of the transverse contact module can be tilted relative to the transverse baffle module.

[0012] Optionally, the lateral baffle module comprises an inclined support plate, a bottom plate and a vertical support plate, the bottom plate and the vertical support plate are fixedly connected vertically, the two edges of the inclined support plate are fixedly connected to the bottom plate and the vertical support plate respectively, forming a stable support structure, and one side of the vertical support plate away from the inclined support plate is fixedly connected to the friction-reducing module.

[0013] Optionally, first positioning long holes are symmetrically formed at two sides of the base module, the lateral baffle modules are symmetrically arranged at two ends of the first positioning long holes, second positioning long holes are formed at two sides of the bottom plate, and the bottom plate and the base module are fixedly connected by a locking bolt penetrating through the first positioning long holes and the second positioning long holes.

[0014] Optionally, the friction-reducing module comprises a rolling track structure, the rolling track structure is fixedly connected to one side of the vertical support plate away from the inclined support plate, positioning channels are formed in the rolling track structure, a screw rod is arranged between the two positioning channels, the screw rod extends out of the two positioning channels at two ends and is fixed to the rolling track structure through a locking nut, and a rolling shaft is rotatably connected to the middle part of the screw rod.

[0015] Optionally, a plurality of groups of the friction-reducing modules are arranged on one side of the vertical support plate away from the inclined support plate, and a plurality of groups of the screw rods, the locking nuts and the rolling shafts are arranged on the rolling track structure.

[0016] Optionally, the transverse baffle module includes a transverse rear baffle, and a plurality of sliding block fixing members are symmetrically fixed to the side of the transverse rear baffle facing the test beam. The sliding block fixing members are fixed to the transverse contact module.

[0017] Optionally, the transverse rear baffle has a third positioning elongated hole on both sides near the vertical support plate, and the vertical support plate has a fourth positioning elongated hole on one side near the transverse rear baffle. The connecting module includes a connecting steel plate, which is disposed on both sides of the transverse rear baffle. Both ends of the connecting steel plate have positioning screw holes. One end of the connecting steel plate is connected to the third positioning elongated hole and fixed by a third connecting bolt, and the other end is connected to the fourth positioning elongated hole and fixed by a fourth connecting bolt, thereby fixing the transverse rear baffle between the two vertical support plates.

[0018] Optionally, multiple connecting steel plates are symmetrically arranged on both sides of the transverse rear baffle.

[0019] Optionally, the lateral contact module includes a lateral front baffle, an arc-shaped guide rail, and a guide rail slide. The lateral front baffle is integrally formed with the arc-shaped guide rail by welding. The arc-shaped guide rail is slidably connected to the guide rail slide, and the guide rail slide is connected to the slide fixing component in a one-to-one correspondence.

[0020] Optionally, multiple diagonal bracing plates are provided, which are arranged in parallel and are all perpendicularly fixed to the base plate and the vertical support plate to form a stable triangular support structure.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] The base module provides a stable load-bearing foundation for the test beam. Paired lateral baffle modules, in conjunction with friction-reducing modules, significantly reduce frictional resistance with the sides of the test beam through rolling contact. This allows the test beam to undergo necessary longitudinal expansion and contraction and vertical deflection during fatigue loading, while also restricting lateral slippage from both sides. Simultaneously, the lateral baffle modules are securely connected to the lateral baffle modules via connecting modules. Combined with the tilt-rotatable lateral contact modules, they precisely abut against the ends of the test beam, effectively restraining its torsional and overturning tendencies and avoiding excessive restriction of beam deformation by rigid contact. This structure comprehensively solves the problems of insufficient self-weight constraint, the introduction of harmful friction by rigid blocks, and inconvenient adjustment in existing systems. It significantly improves the positional stability and anti-overturning capability of the test beam under long-term fatigue loading, reduces test interruption rates and data distortion risks, and is highly adaptable to test beams of different sizes, offering high practicality and test reliability. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Fig. 1 This is a schematic diagram of the end-limiting device for preventing fatigue loading displacement and overturning of the test beam in the present invention.

[0025] Fig. 2 This is a schematic diagram of the end-limiting device for preventing fatigue loading displacement and overturning of the test beam according to the present invention;

[0026] Fig. 3 This is a detailed structural diagram of the side baffle module and the friction reduction module in this invention;

[0027] Fig. 4 This is a detailed structural diagram of the transverse baffle module and the connecting module in this invention.

[0028] In the diagram: 1. Side baffle module; 2. Friction reduction module; 3. Transverse baffle module; 4. Connecting module; 5. Transverse contact module; 6. Base module; 7. Test beam; 11. Diagonal brace plate; 12. Base plate; 13. Vertical support plate; 14. Second positioning elongated hole; 15. Fourth positioning elongated hole; 16. Locking bolt; 21. Roller structure; 22. Positioning channel; 23. Screw; 24. Roller; 25. Locking nut; 31. Transverse rear baffle; 32. Third positioning elongated hole; 33. Slide fixing component; 34. Third connecting bolt; 41. Connecting steel plate; 42. Positioning screw hole; 43. Fourth connecting bolt; 51. Transverse front baffle; 52. Arc-shaped guide rail; 53. Guide rail slide; 61. First positioning elongated hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figs. 1 to 4 As shown, this embodiment provides an end-stopping device to prevent fatigue loading displacement and overturning of a test beam, comprising:

[0032] Base module 6, used to place test beam 7, is set at both ends of test beam 7;

[0033] Lateral baffle modules 1 are fixed in pairs to both sides of the base module 6 and are set on both sides of the test beam 7;

[0034] Friction reduction module 2 is fixed to the side of the side baffle module 1 near the test beam 7 and rolls in contact with the test beam 7;

[0035] The transverse baffle module 3 is fixed between the two transverse baffle modules 1 via the connecting module 4 and faces the test beam 7.

[0036] The transverse contact module 5 has one end fixed to the side of the transverse baffle module 3 near the test beam 7, and the other end facing the test beam 7 and forming an abutment with the test beam 7; wherein, the abutment end of the transverse contact module 5 and the test beam 7 can be tilted and rotated relative to the transverse baffle module 3.

[0037] The base module 6 provides a stable load-bearing foundation for the test beam 7. Paired lateral baffle modules 1, in conjunction with the friction-reducing module 2, significantly reduce frictional resistance with the sides of the test beam 7 through rolling contact. This allows the test beam 7 to undergo necessary longitudinal expansion and contraction and vertical deflection during fatigue loading, while also restricting its lateral slippage from both sides. Simultaneously, the transverse baffle module 3 is securely connected to the lateral baffle module 1 via the connecting module 4. Combined with the tilt-rotating transverse contact module 5, it precisely abuts against the ends of the test beam 7, effectively restraining its torsional and overturning tendencies and avoiding excessive restriction of beam deformation by rigid contact. This structure comprehensively solves the problems of insufficient self-weight constraint, the introduction of harmful friction by rigid blocks, and inconvenient adjustment in existing systems. It significantly improves the positional stability and anti-overturning ability of the test beam 7 under long-term fatigue loading, reduces the risk of test interruption and data distortion, and is highly adaptable to test beams 7 of different sizes, offering high practicality and test reliability.

[0038] In some alternative implementations, the side baffle module 1 includes a diagonal brace 11, a base plate 12, and a vertical support plate 13. The base plate 12 and the vertical support plate 13 are vertically fixed together. The two adjacent edges of the diagonal brace 11 are vertically fixed together with the base plate 12 and the vertical support plate 13, respectively, to form a stable support structure. The side of the vertical support plate 13 away from the diagonal brace 11 is fixed together with the friction reduction module 2.

[0039] By vertically fixing the base plate 12 to the vertical support plate 13 and vertically fixing the two adjacent edges of the diagonal brace plate 11 to the base plate 12 and the vertical support plate 13 respectively, a stable triangular support structure is formed. On the one hand, it can significantly improve the overall structural rigidity and load-bearing capacity of the lateral baffle module 1, effectively resist the lateral thrust and overturning moment generated during the fatigue loading of the test beam 7, and prevent the lateral baffle module 1 itself from deforming or displacing, thus providing a reliable foundation for the stable installation and operation of the subsequent friction reduction module 2. On the other hand, this structural design can ensure that the friction reduction module 2 on the side of the vertical support plate 13 away from the diagonal brace plate 11 can always maintain a precise rolling contact with the test beam 7, and will not fail due to positional displacement of the friction reduction module 2 caused by unstable support. This not only ensures the function of the friction reduction module 2 in reducing friction and allowing the test beam 7 to undergo necessary longitudinal expansion and contraction and vertical flexural deformation, but also further strengthens the constraint effect of the lateral baffle module 1 on the lateral displacement of the test beam 7, thus building a solid lateral support defense line for the entire limiting device to stably play its role in preventing misalignment and overturning.

[0040] In some alternative implementations, the base module 6 has first positioning elongated holes 61 symmetrically opened on both sides, the side baffle modules 1 are symmetrically arranged at both ends of the first positioning elongated holes 61, and the bottom plate 12 has second positioning elongated holes 14 opened on both sides. The bottom plate 12 and the base module 6 are fixedly connected by locking bolts 16 passing through the first positioning elongated holes 61 and the second positioning elongated holes 14.

[0041] By symmetrically opening first positioning elongated holes 61 on both sides of the base module 6 and second positioning elongated holes 14 on both sides of the bottom plate 12 of the lateral baffle module 1, and fixing it with locking bolts 16 passing through the two positioning elongated holes, the core advantage lies in its flexible and adjustable installation and positioning function: on the one hand, according to the lateral dimension width of the test beam 7, the installation position of the lateral baffle module 1 in the first positioning elongated hole 61 and the fixing position of the bottom plate 12 at the second positioning elongated hole 14 can be adjusted to precisely adjust the distance between the two lateral baffle modules 1, so that it can adapt to the lateral limiting requirements of test beams 7 of different specifications, and avoid the device being unusable or having poor limiting effect due to the size difference of the test beam 7. The problem is that it significantly improves the versatility and adaptability of the device. On the other hand, the fixing method of the locking bolt 16 can ensure the stability of the connection between the side baffle module 1 and the base module 6 after adjustment, prevent the side baffle module 1 from shifting due to force during the fatigue loading of the test beam 7, and ensure its constraint on the lateral displacement of the test beam 7. It can also be conveniently disassembled and readjusted when the test beam 7 needs to be replaced or the limit position needs to be adjusted, reducing the complexity of operation. At the same time, there is no need to make destructive modifications to the base module 6 or the side baffle module 1, further extending the service life of the device and providing a flexible and reliable installation foundation for the entire limit device to continuously and stably play the role of preventing misalignment and overturning.

[0042] In some alternative implementations, the friction reduction module 2 includes a raceway structure 21, which is fixed in pairs to the side of the vertical support plate 13 away from the inclined support plate 11. The raceway structure 21 has a positioning channel 22, and a screw 23 is inserted between the two positioning channels 22. The two ends of the screw 23 extend out of the two positioning channels 22 and are fixed to the raceway structure 21 by locking nuts 25. A roller 24 is rotatably connected to the middle of the screw 23.

[0043] The installation carrier is provided by the roller structure 21 fixed in pairs to the vertical support plate 13. Combined with the screw 23 passing through the positioning channel 22, the end locking nut 25, and the centrally rotatably connected roller 24, it possesses multiple technical advantages: Firstly, the roller 24 forms rolling contact with the test beam 7, which, compared to the sliding contact of traditional rigid blocks, significantly reduces the frictional resistance of the test beam 7 during fatigue loading, avoiding harmful friction interference with the beam's true deformation and test data; secondly, the combination of the positioning channel 22 with the screw 23 and locking nut 25 allows for precise... Adjusting the position of the roller 24 vertically or horizontally ensures that the roller 24 is always in contact with the side of the test beam 7, adapting to the friction reduction requirements of test beams 7 of different sizes. At the same time, the flexible rotation of the roller 24 around the screw 23 can fully adapt to the displacement changes of the test beam 7 during longitudinal expansion and contraction and vertical deflection. It does not restrict the necessary deformation of the beam, and the roller 24 is constrained by the raceway structure 21 to prevent it from deviating and failing. It continuously maintains a stable friction reduction and lateral limiting effect, providing key support for the continuity and data reliability of the long-term fatigue loading of the test beam 7.

[0044] In some alternative implementations, the friction reduction module 2 is provided with multiple sets on the side of the vertical support plate 13 away from the diagonal brace plate 11, and multiple sets of screws 23, locking nuts 25 and rollers 24 are provided on the raceway structure 21.

[0045] By setting multiple sets of friction-reducing modules 2 on the side of the vertical support plate 13 away from the diagonal brace plate 11, and configuring multiple sets of screws 23, locking nuts 25, and rollers 24 on the raceway structure 21, significant technical advantages are achieved: Firstly, the multiple sets of friction-reducing modules 2 form multi-point rolling contact with the side of the test beam 7, which can evenly distribute the lateral force generated during fatigue loading of the test beam 7 to multiple contact points, avoiding excessive force at a single point that could lead to local deformation of the test beam 7 or premature wear of the friction-reducing modules 2. Simultaneously, it makes the lateral constraint more balanced, effectively suppressing the torsional tendency of the test beam 7. Secondly, the multiple sets of rollers... The synergistic effect of 24 can further reduce the overall frictional resistance. Compared with a single friction reduction module 2, it can better adapt to the complex displacement of the test beam 7 during longitudinal expansion and contraction and vertical deflection. It does not restrict the necessary deformation of the beam, and can improve the overall load-bearing capacity of the friction reduction module 2 through the mutual support of multiple structures, resist greater lateral thrust, and prevent the friction reduction module 2 or the vertical support plate 13 from deforming due to force concentration. It ensures that the friction reduction and lateral limiting functions are continuously and stably played during long-term fatigue loading, and provides a stronger guarantee for the positional stability of the test beam 7 and the reliability of test data.

[0046] In some alternative implementations, the transverse baffle module 3 includes a transverse rear baffle 31, on the side of the transverse rear baffle 31 facing the test beam 7, a plurality of slide fasteners 33 are symmetrically fixed, and the slide fasteners 33 are fixed to the transverse contact module 5.

[0047] Using the transverse rear baffle 31 as the basic load-bearing component, multiple sliding seat fixing parts 33 are symmetrically fixed to the side facing the test beam 7 and then fixed to the transverse contact module 5. This has significant technical advantages: First, the symmetrically arranged sliding seat fixing parts 33 can make the connection between the transverse contact module 5 and the transverse rear baffle 31 more balanced, avoiding the transverse contact module 5 from shifting due to uneven force at the connection point. This ensures that the transverse contact module 5 is always accurately facing the test beam 7, stably playing its role in resisting and limiting, and effectively suppressing the transverse displacement and rotation tendency of the test beam 7. Second, the design of multiple sliding seat fixing parts 33 can enhance the overall load-bearing capacity of the connection structure, preventing the transverse contact module 5 from loosening or falling off due to vibration and beam reaction force during the fatigue loading of the test beam 7. This provides a stable installation foundation for the transverse contact module 5, ensuring that it can smoothly achieve adaptive contact with the test beam 7. It does not restrict the necessary longitudinal expansion and contraction and vertical deflection of the test beam 7, and can continuously and reliably strengthen the transverse constraint effect, further improving the stability and reliability of the entire limiting device in preventing misalignment and overturning.

[0048] In some alternative embodiments, the transverse rear baffle 31 has third positioning elongated holes 32 on both sides near the vertical support plate 13, and the vertical support plate 13 has a fourth positioning elongated hole 15 on one side near the transverse rear baffle 31. The connecting module 4 includes a connecting steel plate 41, which is disposed on both sides of the transverse rear baffle 31. Both ends of the connecting steel plate 41 have positioning screw holes 42. One end of the connecting steel plate 41 is connected to the third positioning elongated hole 32 and fixed by the third connecting bolt 34, and the other end is connected to the fourth positioning elongated hole 15 and fixed by the fourth connecting bolt 43, thereby fixing the transverse rear baffle 31 between the two vertical support plates 13.

[0049] By opening third positioning elongated holes 32 on both sides of the transverse rear baffle 31 and fourth positioning elongated holes 15 on the corresponding side of the vertical support plate 13, and using connecting steel plates 41 with positioning screw holes 42 at both ends to fix the two together with third connecting bolts 34 and fourth connecting bolts 43, it has multiple technical advantages: On the one hand, the connecting steel plates 41 rigidly and steadily connect the transverse baffle module 3 and the side baffle module 1 into an integral frame, which can effectively transmit and disperse the transverse force and overturning moment generated during fatigue loading of the test beam 7, avoid relative displacement of the two modules due to loose connection, and ensure the synergistic effect of limiting the test beam 7; on the other hand, the third positioning elongated holes The design of the 32 and / or fourth positioning elongated hole 15 and the connecting steel plate 41 allows for flexible adjustment of the position of the transverse baffle module 3 relative to the side baffle module 1. This not only allows for precise adjustment of the contact distance between the transverse contact module 5 and the test beam 7 according to the end dimensions of the test beam 7, adapting to the limiting requirements of test beams 7 of different specifications, but also facilitates the installation, disassembly, and subsequent maintenance of the device through the detachable connection of bolts. At the same time, the symmetrical connecting steel plates 41 on both sides can ensure the overall force balance, preventing excessive force on one side from causing module deformation, further enhancing the reliability of the device in constraining the transverse displacement and overturning tendency of the test beam 7, and providing a guarantee for the long-term stable loading of the test beam 7.

[0050] In some alternative implementations, multiple connecting steel plates 41 are symmetrically arranged on both sides of the transverse rear baffle 31.

[0051] On the one hand, the multiple connecting steel plates 41 symmetrically distributed on both sides can evenly distribute the connection force between the transverse baffle module 3 and the lateral baffle module 1 to multiple stress points, avoiding deformation and fracture caused by the concentrated force of a single or a small number of connecting steel plates 41. This significantly improves the overall rigidity and load-bearing capacity of the connection between the two modules, effectively resisting the transverse impact force and overturning moment generated during the fatigue loading of the test beam 7, and preventing relative displacement between the two modules. On the other hand, the synergistic effect of the multiple connecting steel plates 41 can further enhance the frame stability of the entire limiting device, ensuring that the lateral limiting of the test beam 7 by the lateral baffle module 1 and the end abutment constraint of the test beam 7 by the transverse baffle module 3 form an efficient synergy. This does not interfere with the necessary longitudinal expansion and contraction and vertical deflection of the test beam 7, and can continuously and reliably constrain its transverse sliding and torsional tendencies. At the same time, the symmetrical design also ensures that the test beam 7 is subjected to balanced forces, avoiding local damage to the beam due to excessive constraint on one side of the device, and providing a more solid structural support for the continuity and data reliability of long-term fatigue loading tests.

[0052] In some optional implementations, the lateral contact module 5 includes a lateral front baffle 51, an arc-shaped guide rail 52, and a guide rail slide 53. The lateral front baffle 51 is integrally formed with the arc-shaped guide rail 52 by welding. The arc-shaped guide rail 52 is slidably connected to the guide rail slide 53. The guide rail slide 53 is connected to the slide fixing member 33 in a one-to-one correspondence.

[0053] On the one hand, the sliding fit between the arc-shaped guide rail 52 and the guide rail slide 53 can flexibly adapt to the flexural deformation and slight rotation of the test beam 7 during fatigue loading, allowing the transverse front baffle 51 to follow the beam deformation with low friction. This avoids the limitation of necessary beam deformation by rigid contact and greatly reduces the interference of contact friction on test data. On the other hand, the integrated welding design of the transverse front baffle 51 and the arc-shaped guide rail 52 ensures the structural stability of the contact module itself, effectively resisting the transverse reaction force of the test beam 7 and preventing component loosening that could lead to limit failure. At the same time, the one-to-one connection between the guide rail slide 53 and the slide fixing part 33 can accurately position the installation position of the transverse contact module 5, ensuring that the transverse front baffle 51 always maintains reliable contact with the test beam 7, continuously and stably constraining the transverse displacement and torsional trend of the beam, further strengthening the anti-misalignment and anti-overturning effect of the entire device, and providing a reliable guarantee for the continuity and data authenticity of the long-term fatigue loading of the test beam 7.

[0054] In some alternative implementations, multiple diagonal bracing plates 11 are provided, which are arranged in parallel and are all vertically fixed to the base plate 12 and the vertical support plate 13 to form a stable triangular support structure.

[0055] On the one hand, the multiple parallel bracing plates 11, through the stable structural characteristics of triangular support, further enhance the overall structural rigidity and deformation resistance of the lateral baffle module 1 based on the single set of bracing plates 11. This allows for a more even transmission of the lateral thrust and overturning moment generated during fatigue loading of the test beam 7 to the base plate 12, preventing the base plate 12 or vertical support plate 13 from bending or shifting due to localized stress concentration, thus providing a more stable support foundation for the lateral baffle module 1. On the other hand, the multiple parallel bracing plates 11 can form a collaborative force-bearing system, significantly increasing the load-bearing capacity of the lateral baffle module 1. Even under long-term cyclic loads or large lateral forces, it can maintain structural stability, ensuring that the friction-reducing module 2 fixed on it always maintains precise rolling contact with the test beam 7. This prevents the friction-reducing and limiting functions from being affected by the failure of the support structure, thereby continuously and reliably constraining the lateral displacement and overturning tendency of the test beam 7. This provides key structural support for the long-term stable operation of the entire limiting device, ensuring the continuity of the test and the reliability of the data.

[0056] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0057] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0058] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An end-stopping device for preventing fatigue loading displacement and overturning of a test beam, characterized in that, include: A base module (6) is used to place the test beam (7) and is located at both ends of the test beam (7); Lateral baffle modules (1) are fixed in pairs to both sides of the base module (6) and are set on both sides of the test beam (7); The friction reduction module (2) is fixed to the side of the side baffle module (1) near the test beam (7) and rolls in contact with the test beam (7); The transverse baffle module (3) is fixed between the two lateral baffle modules (1) by the connecting module (4) and faces the test beam (7). The transverse contact module (5) has one end fixed to the side of the transverse baffle module (3) near the test beam (7), and the other end facing the test beam (7) and forming an abutment with the test beam (7); wherein the abutment end of the transverse contact module (5) and the test beam (7) can be pitched and rotated relative to the transverse baffle module (3).

2. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 1, characterized in that, The side baffle module (1) includes a diagonal brace (11), a base plate (12) and a vertical support plate (13). The base plate (12) and the vertical support plate (13) are vertically fixed. The two adjacent edges of the diagonal brace (11) are vertically fixed to the base plate (12) and the vertical support plate (13) respectively, forming a stable support structure. The side of the vertical support plate (13) away from the diagonal brace (11) is fixed to the friction reduction module (2).

3. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 2, characterized in that, The base module (6) has first positioning elongated holes (61) symmetrically opened on both sides. The side baffle module (1) is symmetrically arranged at both ends of the first positioning elongated holes (61). The base plate (12) has second positioning elongated holes (14) on both sides. The base plate (12) and the base module (6) are fixedly connected by locking bolts (16) passing through the first positioning elongated holes (61) and the second positioning elongated holes (14).

4. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 2, characterized in that, The friction reduction module (2) includes a raceway structure (21), which is fixed in pairs to the side of the vertical support plate (13) away from the inclined support plate (11). The raceway structure (21) has a positioning channel (22), and a screw (23) is inserted between the two positioning channels (22). The two ends of the screw (23) extend out of the two positioning channels (22) and are fixed to the raceway structure (21) by locking nuts (25). A roller (24) is rotatably connected to the middle of the screw (23).

5. The end-limiting device for preventing fatigue loading misalignment and overturning of the test beam according to claim 4, characterized in that, The friction reduction module (2) is provided in multiple sets on the side of the vertical support plate (13) away from the inclined support plate (11), and the screw (23), the locking nut (25) and the roller (24) on the raceway structure (21) are provided in multiple sets.

6. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 2, characterized in that, The transverse baffle module (3) includes a transverse rear baffle (31). Multiple sliding block fasteners (33) are symmetrically fixed to one side of the transverse rear baffle (31) facing the test beam (7). The sliding block fasteners (33) are fixed to the transverse contact module (5).

7. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 6, characterized in that, The transverse rear baffle (31) has a third positioning elongated hole (32) on both sides near the vertical support plate (13), and the vertical support plate (13) has a fourth positioning elongated hole (15) on one side near the transverse rear baffle (31). The connecting module (4) includes a connecting steel plate (41), which is disposed on both sides of the transverse rear baffle (31). Both ends of the connecting steel plate (41) have positioning screw holes (42). One end of the connecting steel plate (41) is connected to the third positioning elongated hole (32) and fixed by the third connecting bolt (34), and the other end is connected to the fourth positioning elongated hole (15) and fixed by the fourth connecting bolt (43), thereby fixing the transverse rear baffle (31) between the two vertical support plates (13).

8. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 7, characterized in that, Multiple connecting steel plates (41) are symmetrically arranged on both sides of the transverse rear baffle (31).

9. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 6, characterized in that, The transverse contact module (5) includes a transverse front baffle (51), an arc-shaped guide rail (52), and a guide rail slide (53). The transverse front baffle (51) is welded to the arc-shaped guide rail (52) to form an integral whole. The arc-shaped guide rail (52) is slidably connected to the guide rail slide (53). The guide rail slide (53) is connected to the slide fixing member (33) in a one-to-one correspondence.

10. The end-limiting device for preventing fatigue loading misalignment and overturning of a test beam according to claim 2, characterized in that, Multiple inclined bracing plates (11) are provided, and the multiple inclined bracing plates (11) are arranged in parallel and are all vertically fixed to the base plate (12) and the vertical support plate (13) to form a stable triangular support structure.

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