Progressive-collapse-resistant test constraint structure and progressive-collapse-resistant test device

Abstract

The invention discloses an anti-progressive-collapse test constraint structure and an anti-progressive-collapse test device.The anti-progressive-collapse test constraint structure comprises a base bottom plate, two sets of first limiting assemblies arranged oppositely and two sets of second limiting assemblies arranged oppositely, the first limiting assemblies are fixedly connected with the base bottom plate, and the second limiting assemblies are fixedly connected with the base bottom plate; the first limiting assembly is used for clamping the test component in the first horizontal direction so as to limit the displacement of the test component in the first horizontal direction; the second limiting assembly is fixedly connected with the base bottom plate, and the second limiting assembly is used for clamping the test component in the second horizontal direction so as to limit the displacement of the test component in the second horizontal direction; the first horizontal direction is perpendicular to the second horizontal direction. In the progressive collapse resistance test, the test component is limited by the first limiting assembly and the second limiting assembly and keeps moving vertically and downwards, the probability that the test component overturns due to lateral movement or torsion is reduced, and therefore the success rate of the progressive collapse resistance test is increased.

Description

Technical Field

[0001] The invention relates to the technical field of building disaster prevention, and in particular to an anti-progressive collapse test restraint structure and an anti-progressive collapse test device. Background Art

[0002] The situation in which the local structure of a building is damaged due to force majeure or accidental factors, resulting in a disproportionate large-scale collapse of the overall structure, is called progressive collapse. The occurrence of progressive collapse often causes relatively large property losses, and sometimes even causes relatively serious casualties. Therefore, in order to reduce the occurrence of progressive collapse events, people have conducted research and tests on the ability of building structures to resist progressive collapse. At present, the beam-column structure model is usually used to analyze the role of the beam-column structure in the process of resisting progressive collapse. In the progressive collapse test of the beam-column structure, the state of failure of the middle column is usually simulated. When making a two-span continuous beam-column structure, the part below the beam-column node of the middle middle column is omitted, and the servo loading device is used to continuously pressurize the upper part of the middle column to simulate the force process when the beam-column structure collapses continuously.

[0003] However, practice has found that in the progressive collapse test of beam-column structures, as the force on the upper part of the middle column continues to increase, the middle column will have a significant downward displacement. In the process of the middle column moving downward, it is easy for the test component to shift sideways or twist due to process defects of the test component itself or deviations in the pressurization direction, thus causing the test component to overturn and cause the test failure.

[0004] Therefore, how to reduce the probability of overturning of the test component and improve the success rate of the test is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The invention provides an anti-progressive collapse test restraint structure and an anti-progressive collapse test device, which can reduce the probability of overturning of a test component during the test and improve the success rate of the test.

[0006] In order to achieve the above-mentioned object, the first aspect of the present invention discloses a progressive collapse test restraint structure, which is applied to a progressive collapse test device. The progressive collapse test device comprises a test member, which is a middle column of a beam-column structure. The progressive collapse test restraint structure comprises: A base bottom plate, the base bottom plate is fixedly connected to the test bench or the ground; Two sets of first limit assemblies arranged opposite to each other, wherein the first limit assemblies are fixedly connected to the base bottom plate, and the first limit assemblies are used to clamp the test component in a first horizontal direction to limit the displacement of the test component in the first horizontal direction; Two sets of second limit assemblies arranged opposite to each other, wherein the second limit assemblies are fixedly connected to the base bottom plate, and the second limit assemblies are used to clamp the test component in a second horizontal direction to limit the displacement of the test component in the second horizontal direction; The first horizontal direction is perpendicular to the second horizontal direction; During the progressive collapse resistance test, the test component can move relative to the first limit assembly and the second limit assembly in a vertical force direction, and the vertical force direction is perpendicular to the first horizontal direction and the second horizontal direction.

[0007] As an optional embodiment, in an embodiment of the first aspect of the present invention, the first limiting assembly includes a limiting support member and a fixed clamping member, the limiting support member is fixedly connected to the bottom plate of the base, one side of the limiting support member is connected to the fixed clamping member, the fixed clamping member is used to clamp the test component to limit the displacement of the test component in the first horizontal direction, and the fixed clamping member and the test component can move relative to each other in the above-mentioned vertical force direction.

[0008] As an optional implementation, in an embodiment of the first aspect of the present invention, the fixed clamping member is provided with a fixed back plate and a clamping plate, one side of the fixed back plate is fixedly connected to the side surface of the limiting support member, the other side of the fixed back plate is fixedly connected to the clamping plate, the fixed back plate is provided with a limiting strip, the limiting strip is integrally formed with the fixed back plate, and the limiting strip is used to limit the displacement of the clamping plate; The clamping plate is a polytetrafluoroethylene plate, and is used to clamp the test component to limit the displacement of the test component in the first horizontal direction. The clamping plate and the test component can move relative to each other in the vertical force direction. During the progressive collapse resistance test, lubricating oil is provided between the clamping plate and the test component.

[0009] As an optional implementation, in an embodiment of the first aspect of the present invention, the fixed back plate and the clamping plate are both square plates; The width of the fixed back plate is greater than or equal to the width of the limiting support member, the length of the fixed back plate is less than or equal to the length of the limiting support member, and the length of the limiting strip is equal to the length of the fixed back plate.

[0010] As an optional embodiment, in an embodiment of the first aspect of the present invention, the second limiting assembly includes a movable clamping assembly and two sets of relatively arranged track groups, the two sets of track groups are respectively movably connected to the movable clamping assembly, the track group is used to limit the movement direction of the movable clamping assembly, the movable clamping assembly is used to clamp the test component to limit the displacement of the test component in the second horizontal direction, and the movable clamping assembly moves in the above-mentioned vertical force direction together with the test component.

[0011] As an optional embodiment, in an embodiment of the first aspect of the present invention, the track group includes two relatively arranged track members, each of the track members is provided with a track plate, and a moving track is formed between the track plates corresponding to the two relatively arranged track members, and the moving track is used to limit the movement direction of the movable clamping assembly.

[0012] As an optional implementation, in an embodiment of the first aspect of the present invention, the movable clamping assembly includes: A clamping block, the clamping block is used to clamp the test component; A horizontal connecting rod group, wherein the horizontal connecting rod group comprises two horizontal connecting rods, and the top surface and the bottom surface of the clamping block are respectively connected to the side surface of one of the horizontal connecting rods; A movable assembly, the movable assembly comprising four roller groups, both ends of each of the horizontal connecting rods are respectively connected to a roller group, and the roller group is movably connected to the track group; A vertical connecting rod group, the vertical connecting rod group includes two vertical connecting rods, the vertical connecting rod and the horizontal connecting rod are perpendicular to each other in the same vertical plane, the two ends of the vertical connecting rod are respectively connected to a roller group, and the two roller groups connected to the same vertical connecting rod are respectively connected to the two horizontal connecting rods.

[0013] As an optional implementation, in an embodiment of the first aspect of the present invention, a track groove is provided at one end of each track plate, and the track grooves corresponding to the two oppositely arranged track plates constitute the motion track; The roller assembly comprises a roller column and at least two roller units, and two opposite sides of the roller column are respectively connected to at least one roller unit; The roller unit comprises a roller, a screw, a gasket and two roller supports arranged opposite to each other, the roller is rotatably installed between the two roller supports through the screw, the roller is provided with a connecting through hole, the roller support is provided with a mounting hole, the screw is passed through the connecting through hole and is arranged on the roller, and both ends of the screw pass through the mounting holes and are connected to the roller supports through the gasket; The roller is arranged in the track groove, and the roller is in rolling contact with the bottom surface of the track groove. The roller can move up and down along the track groove. The track groove is used to guide the direction of the roller moving up and down and to limit the front and rear displacement of the roller. Two roller supports arranged opposite to each other are located outside the two outer side walls of the corresponding track plate, and the roller supports are used to limit the front-rear displacement of the roller when the roller moves up and down.

[0014] As an optional implementation, in an embodiment of the first aspect of the present invention, the progressive collapse resistance test restraint structure further comprises a support assembly, wherein the support assembly comprises at least one first support member and at least one second support member; One end of the first support member is connected to the base bottom plate, and the other end of the first support member is connected to the first limiting assembly; One end of the second support member is connected to the base bottom plate, and the other end of the second support member is connected to the second limiting assembly.

[0015] The second aspect of the present invention discloses an anti-progressive collapse test device, which includes a test component and the anti-progressive collapse test constraint structure described in the first aspect of the present invention, and the anti-progressive collapse test constraint structure limits the displacement of the test component in the first horizontal direction and the second horizontal direction.

[0016] In summary, the anti-progressive collapse test restraint structure and anti-progressive collapse test device provided by the present invention have the following technical effects: The present invention provides a restraining structure for a progressive collapse test and a progressive collapse test device. The first limiting assembly is provided to limit the displacement of the test member in the first horizontal direction, and the second limiting assembly is provided to limit the displacement of the test member in the second horizontal direction. The first horizontal direction and the second horizontal direction are perpendicular to each other, so as to keep the test member from moving or twisting in the horizontal direction. During the progressive collapse test, the test member moves downward under the pressure in the vertical direction, and the test member is kept moving vertically downward due to the horizontal limitation of the first limiting assembly and the second limiting assembly, so as to reduce the probability of the test member overturning due to lateral displacement or twisting, thereby improving the success rate of the progressive collapse test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a progressive collapse resistance test restraint structure according to an embodiment of the present invention; Figure 2 for Figure 1 A single-side structural diagram of a progressive collapse resistance test restraint structure is shown; Figure 3 for Figure 1A schematic structural diagram of the movable clamping assembly shown; Figure 4 for Figure 3 The structural schematic diagram of the roller group shown; Figure 5 yes Figure 4 A schematic structural diagram of the roller unit shown; Figure 6 yes Figure 1 An enlarged schematic diagram of part A is shown; Figure 7 yes Figure 1 An enlarged schematic diagram of portion B is shown; Figure 8 yes Figure 1 An enlarged schematic diagram of section C is shown; Fig. 9 It is a structural schematic diagram of an anti-progressive collapse test device according to an embodiment of the present invention.

[0018] The meanings of the reference numerals are as follows: 1. Base bottom plate; 11. Bottom plate fixing hole; 2. First limiting assembly; 21. Limiting support member; 22. Fixed clamping member; 221. Fixed back plate; 3. Second limiting assembly; 31. Movable clamping assembly; 32. Track group; 321. Track member; 322. Track plate; 3221. Track groove; 33. Moving track; 311 Clamping block; 312. Horizontal connecting rod; 313. Roller group; 314. Vertical connecting rod; 315. Roller column; 316. Roller unit; 3161. Roller; 3162. Screw; 3163. Gasket; 3164. Roller support; 4. Support assembly; 41. First support member; 411. First support part; 42. Second support member; 421. Second support part; 43. Support fixing hole. DETAILED DESCRIPTION

[0019] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] The situation in which a building's local structure is damaged due to force majeure or accidental factors, resulting in a disproportionate large-scale collapse of the overall structure, is called progressive collapse. The occurrence of progressive collapse often causes relatively large property losses, and sometimes even causes relatively serious casualties. At first, people did not realize the harmfulness of the progressive collapse of buildings. As more and more large buildings have collapsed, countries around the world have begun to pay attention to the progressive collapse behavior of buildings. People have found that when part of the structure or component is damaged by accidental loads, the structure itself can transmit internal forces through other backup paths, thereby achieving the effect of limiting further damage. This ability is called the structure's ability to resist progressive collapse.

[0023] Therefore, in order to further improve the ability of the structure to resist progressive collapse and reduce the occurrence of progressive collapse events, people have conducted research and tests on the ability of building structures to resist progressive collapse. Among the experiments currently conducted at home and abroad, there are a large number of tests on the resistance of beam-column structures to progressive collapse. When studying the contribution of beams and columns in the process of resisting progressive collapse, the contribution of beam-column structures in the process of resisting progressive collapse in the overall structure, etc., since the influence of the overall structure on the test is not involved, the beam-column structure model is usually used to analyze the role of the beam-column structure in the process of resisting progressive collapse. In the progressive collapse test of the beam-column structure, the state of failure of the middle column is usually simulated. When making a two-span continuous beam-column structure, the part below the beam-column node of the middle middle column is omitted, and the servo loading device is used to continuously pressurize the upper part of the middle column to simulate the force process when the beam-column structure collapses continuously.

[0024] However, practice has found that in the progressive collapse test of beam-column structures, as the force on the upper part of the middle column continues to increase, the middle column will have a significant downward displacement. In the process of the middle column moving downward, it is easy for the test component to shift sideways or twist due to process defects of the test component itself or deviations in the pressurization direction, thus causing the test component to overturn and cause the test failure.

[0025] Therefore, how to reduce the probability of overturning of the test component and improve the success rate of the test is a technical problem that needs to be solved urgently.

[0026] In order to solve the above technical problems, the present invention provides a progressive collapse resistance test restraint structure and progressive collapse resistance test device, which can reduce the probability of overturning of the test component during the test and improve the success rate of the test.

[0027] Embodiment 1 See also Figure 1 The present invention discloses a restraint structure for anti-progressive collapse test, which is applied to an anti-progressive collapse test device. The anti-progressive collapse test device is mainly used to simulate the continuous collapse of a concrete beam-column structure when a corbel column fails. It is applicable to all beam-column structure collapse test models that simulate the failure of a corbel column under a slow loading mode, and is compatible with various forms of corbel columns. Figure 6 The anti-progressive collapse test device includes a test component 5, wherein the test component 5 is a center column with a corbel in a beam-column structure.

[0028] The anti-continuous collapse test constraint structure includes: a base bottom plate 1, two sets of first limit assemblies 2 arranged oppositely, and two sets of second limit assemblies 3 arranged oppositely. The base bottom plate 1 is fixedly connected to the test bench or the ground. The first limit assembly 2 is fixedly connected to the base bottom plate 1, and the first limit assembly 2 is used to clamp the test component 5 in the first horizontal direction to limit the displacement of the test component 5 in the first horizontal direction. The second limit assembly 3 is fixedly connected to the base bottom plate 1, and the second limit assembly 3 is used to clamp the test component 5 in the second horizontal direction to limit the displacement of the test component 5 in the second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. During the anti-continuous collapse test, the test component 5 can move relative to the first limit assembly 2 and the second limit assembly 3 in the vertical force direction, and the vertical force direction is perpendicular to the first horizontal direction and the second horizontal direction.

[0029] In the embodiment of the present invention, the displacement of the test member 5 in the first horizontal direction is limited by setting the first limit assembly 2, and the displacement of the test member 5 in the second horizontal direction is limited by setting the second limit assembly 3, and the first horizontal direction and the second horizontal direction are perpendicular, so as to keep the test member 5 from moving and twisting in the horizontal direction. During the anti-continuous collapse test, the test member 5 moves downward under the pressure in the vertical direction, and the test member 5 keeps moving vertically downward due to the limitation of the first limit assembly 2 and the second limit assembly 3, reducing the probability of the test member 5 overturning due to lateral displacement or twisting, thereby improving the success rate of the anti-continuous collapse test.

[0030] See also Figure 1 As an optional embodiment, the first limit assembly 2 includes a limit support 21 and a fixed clamp 22. The limit support 21 is fixedly connected to the base bottom plate 1. One side of the limit support 21 is connected to the fixed clamp 22. The fixed clamp 22 is used to clamp the test component 5 to limit the displacement of the test component 5 in the first horizontal direction. The fixed clamp 22 and the test component 5 can move relative to each other in the vertical force direction. Among them, the limit support 21 is an H-shaped steel plate with an "H"-shaped cross section. The H-shaped steel plate uses less material and is light in weight, which is easy to move and transport.

[0031] The test member 5 is clamped by fixing the clamping member 22 , thereby limiting the displacement of the test member 5 in the first horizontal direction, so that the test member 5 maintains a state of moving vertically downward.

[0032] See also Figure 2 As an optional embodiment, the fixed clamping member 22 is provided with a fixed back plate 221 and a clamping plate not shown in the figure. One side of the fixed back plate 221 is fixedly connected to the side of the limiting support member 21, and the other side of the fixed back plate 221 is fixedly connected to the clamping plate. A limiting strip 222 is provided on the fixed back plate 221. The limiting strip 222 is integrally formed with the fixed back plate 221, and the limiting strip 222 is used to limit the displacement of the clamping plate.

[0033] The clamping plate is a polytetrafluoroethylene plate, and the clamping plate is used to clamp the test component 5 to limit the displacement of the test component 5 in the first horizontal direction. The clamping plate and the test component 5 can move relative to each other in the above-mentioned vertical force direction. During the continuous collapse resistance test, lubricating oil is provided between the clamping plate and the test component 5. Since the friction coefficient of the polytetrafluoroethylene plate is very low, usually between 0.01 and 0.2, and the friction coefficient between the polytetrafluoroethylene plate and the stainless steel plate or the chrome-plated steel plate is even lower, the static friction coefficient is 0.032-0.051, and the dynamic friction coefficient is 0.021-0.032. Therefore, when the polytetrafluoroethylene plate is used with the lubricating oil, the friction coefficient between the clamping plate and the test component 5 is smaller, so that the clamping plate can clamp the test component 5 in the horizontal direction to limit its horizontal movement, and can also minimize the influence of the clamping plate on the test component 5 during the vertical downward movement, thereby improving the accuracy of the test results.

[0034] The polytetrafluoroethylene plate is used together with lubricating oil to clamp the test component 5 in the horizontal direction to limit the displacement of the test component 5 in the horizontal direction, thereby reducing the possibility of lateral displacement or twisting of the test component 5, and reducing the friction between the test component 5 and the polytetrafluoroethylene plate during the vertical downward movement, thereby reducing the influence of the clamping of the test component 5 on the test results and improving the accuracy of the test results.

[0035] See also Figure 2 As an optional embodiment, the fixed back plate 221 and the clamping plate are both square plates; the width of the fixed back plate 221 is greater than or equal to the width of the limiting support member 21, the length of the fixed back plate 221 is less than or equal to the length of the limiting support member 21, and the length of the limiting strip 222 is equal to the length of the fixed back plate 221.

[0036] The width of the fixed back plate 221 is greater than or equal to the width of the limiting support member 21, and the length of the fixed back plate 221 is less than or equal to the length of the limiting support member 21, so as to facilitate the installation of the clamping plate. The length of the limiting strip 222 is equal to the length of the fixed back plate 221, so that the limiting strip 222 can effectively fix the clamping plate. In another embodiment, the support member 21 is an H-shaped I-beam, and the fixed clamping member 22 is a steel groove, which includes a steel plate welded to the front of the H-shaped I-beam, and steel bars with the same width as the steel plate are welded on both sides, and the width of the steel bar is 1 cm, and the steel bar and the steel plate form a whole.

[0037] See also Figure 1 As an optional embodiment, the second limiting assembly 3 includes a movable clamping assembly 31 and two sets of relatively arranged track groups 32. The two sets of track groups 32 are respectively movably connected to the movable clamping assembly 31. The track group 32 is used to limit the movement direction of the movable clamping assembly 31. The movable clamping assembly 31 is used to clamp the test component 5 to limit the displacement of the test component 5 in the second horizontal direction. The movable clamping assembly 31 moves in the above-mentioned vertical force direction together with the test component 5.

[0038] By providing a movable clamping assembly 31 and two sets of relatively arranged track groups 32, the test component 5 is clamped in the horizontal direction to limit the displacement of the test component 5 in the horizontal direction, thereby reducing the possibility of lateral displacement or twisting of the test component 5. At the same time, the movable clamping assembly 31 moves vertically downward together with the test component 5, and will not generate resistance to the test component 5 during the vertical downward movement, thereby reducing the impact on the test results and improving the accuracy of the test results.

[0039] See also Figure 2 As an optional embodiment, the track group 32 includes two relatively arranged track members 321, each track member 321 is provided with a track plate 322, and a moving track 33 is formed between the track plates 322 corresponding to the two relatively arranged track members 321, and the moving track 33 is used to limit the movement direction of the movable clamping assembly 31.

[0040] The moving track 33 is a vertical track, thereby limiting the movement direction of the movable clamping assembly 31 to the vertical direction, so that after the movable clamping assembly 31 clamps the test component 5, it can limit the test component 5 from moving sideways during the downward movement, reducing the possibility of the test component 5 overturning and improving the success rate of the test.

[0041] See also Figure 3As an optional embodiment, the movable clamping assembly 31 includes: a clamping block 311, a horizontal connecting rod group, a movable assembly and a vertical connecting rod group, the clamping block 311 is used to clamp the test component 5; the horizontal connecting rod group includes two horizontal connecting rods 312, the top surface and the bottom surface of the clamping block 311 are respectively connected to the side of a horizontal connecting rod 312; the movable assembly includes four roller groups 313, the two ends of each horizontal connecting rod 312 are respectively connected to a roller group 313, and the roller group 313 is movably connected to the track group 32; the vertical connecting rod group includes two vertical connecting rods 314, the vertical connecting rod 314 and the horizontal connecting rod 312 are perpendicular to each other in the same vertical plane, the two ends of the vertical connecting rod 314 are respectively connected to a roller group 313, and the two roller groups 313 connected to the same vertical connecting rod 314 are respectively connected to two horizontal connecting rods 312.

[0042] The roller set 313 is adapted to the moving track 33 , and the movable clamping assembly 31 is movably connected to the track set 32 ​​via the roller set 313 , so as to move in the vertical direction according to the moving track 33 .

[0043] See also Figure 4 , Figure 5 and Figure 6 As an optional embodiment, a track groove 3221 is provided at one end of each track plate 322, and the track grooves 3221 corresponding to the two oppositely arranged track plates 322 constitute a motion track 33; the roller group 313 includes a roller column 315 and at least two roller units 316, and the two opposite sides of the roller column 315 are respectively connected to at least one roller unit 316; the roller unit 316 includes a roller 3161, a screw 3162, a gasket 3163 and two oppositely arranged roller supports 3164, the roller 3161 is rotatably installed between the two roller supports 3164 through the screw 3162, the roller 3161 is provided with a connecting through hole, and the roller support 3164 is provided with a mounting hole, The screw rod 3162 is passed through the roller 3161 through the connecting through hole, and the two ends of the screw rod 3162 pass through the mounting holes and are connected to the roller support 3164 through the gasket 3163; the roller 3161 is arranged in the track groove 3221, and the roller 3161 is in rolling contact with the bottom surface of the track groove 3221, and the roller 3161 can move up and down along the track groove 3221, and the track groove 3221 is used to guide the direction of the up and down movement of the roller 3161 and to limit the front and rear displacement of the roller 3161; the two oppositely arranged roller supports 3164 are located outside the two outer side walls of the corresponding track plate 322, and the roller supports 3164 are used to limit the front and rear displacement of the roller 3161 when it moves up and down.

[0044] The track groove 3221 can guide the roller 3161 in the vertical direction when it moves up and down, and limit the front-back displacement of the roller 3161, thereby limiting the horizontal displacement of the movable clamping assembly 31. At the same time, the two roller supports 3164 arranged opposite to each other are arranged outside the two outer side walls of the track plate 322, so as to play a blocking effect, and can further limit the front-back displacement of the roller 3161, thereby preventing the movable clamping assembly 31 from being displaced in the horizontal direction. In addition, the movable clamping assembly 31 is slidably connected to the track groove 3221 through the roller 3161, so that the friction resistance of the movable clamping assembly 31 when it moves vertically downward with the test component 5 is small, thereby reducing the impact on the test results and improving the accuracy of the test results.

[0045] In other embodiments, the track plate 322 may not be provided with the track groove 3221, but the moving track 33 is formed by two smooth inner side walls opposite to each other of the two track plates 322, that is, the two inner side walls of the moving track 33 are the two inner side walls opposite to each other of the two track plates 322. The roller 3161 is in rolling contact with the inner side wall of the moving track 33, and the two oppositely arranged roller supports 3164 are located outside the two outer side walls of the corresponding track plate 322, thereby playing a role of blocking, so as to achieve the effect of limiting the forward and backward displacement of the roller 3161.

[0046] See also Figure 1 As an optional embodiment, the anti-progressive collapse test restraint structure further includes a support assembly 4, the support assembly 4 includes at least one first support member 41 and at least one second support member 42; One end of the first support member 41 is connected to the base bottom plate 1, and the other end of the first support member 41 is connected to the first limit assembly 2. For details, please refer to Figure 1 and Figure 7 The outer surface of the base bottom plate 1 is provided with a fixed slat extending outward, one end of the first support member 41 is fixedly connected to the fixed slat, the first support member 41 is inclined, and the other end of the first support member 41 is provided with a first support portion 411 having a certain inclination angle, and the inclination angle of the first support portion 411 is adaptively set according to the supporting position of the first support member 41 and the H-shaped limiting support member 21. The first support member 41 is connected to the limiting support member 21 through the first support portion 411 to limit the outward displacement of the limiting support member 21 during the experiment so that the limiting support member 21 remains in a vertical state. The first support member 41, the fixed slat and the limiting support member 21 form a triangular structure, which can enhance the structural strength of the limiting support member 21 and improve the stability of the limiting support member 21.

[0047] In other embodiments, an open outer groove may be provided on the outer wall of the H-shaped limiting support member 21, and the other end of the first support member 41 is fixedly connected to the bottom surface of the open outer groove, thereby further enhancing the connection stability between the first support member 41 and the limiting support member 21.

[0048] One end of the second support member 42 is connected to the base bottom plate 1, and the other end of the second support member 42 is connected to the second limit assembly 3. For details, please refer to Figure 1 and Figure 8 The second support member 42 is tilted, one end of the second support member 42 is connected to the base bottom plate 1, the other end of the second support member 42 is connected to the T-shaped track member 321, and the other end of the second support member 42 is provided with a second support portion 421 having a certain tilt angle, and the tilt angle of the second support portion 421 is adaptively set according to the supporting position of the second support member 42 and the T-shaped track member 321. The second support member 42 is connected to the track member 321 through the second support portion 421 to limit the outward displacement of the track member during the experiment so that the track member 321 remains in a vertical state, thereby keeping the moving track 33 vertical. The second support member 42, the base bottom plate 1 and the track member 321 form a triangular structure, which can enhance the structural strength of the track member 321 and improve the stability of the track member 321.

[0049] In other embodiments, an open outer groove may be provided on the side wall of the T-shaped track member 321, and the other end of the second support member 42 is fixedly connected to the bottom surface of the open outer groove, thereby further enhancing the connection stability between the second support member 42 and the track member 321.

[0050] By setting the support components, the overall stability of the anti-progressive collapse test constraint structure can be effectively improved, the test is guaranteed to proceed smoothly, and the success rate of the test is improved.

[0051] In another embodiment, the base bottom plate 1 is provided with a bottom plate fixing hole 11, and the first support member 41 and the second support member 42 are both provided with a support fixing hole 43, and the bottom plate fixing hole 11 and the support fixing hole 43 are both used to install anchor bolts.

[0052] The stability of the restraint structure in the anti-progressive collapse test is further improved by the bottom plate fixing holes 11 and the support fixing holes 43 .

[0053] The preload and torque are calculated based on the bolt stress, and the allowable stress requirements of the material are taken into consideration. It is generally stipulated that the preload of the threaded connection after tightening shall not be greater than 80% of the yield strength of its material. For steel bolts used for fixing, σ refers to the yield strength of the bolt material, and As refers to the stress cross-sectional area of ​​the bolt. Taking into account the different materials of the bolts, the preload recommended by the present invention is as follows: Carbon steel bolt preload Fo=0.65*σ*As.

[0054] Embodiment 2 See also Figure 6 The present invention also discloses an anti-progressive collapse test device, which includes a test component 5 and an anti-progressive collapse test constraint structure described in Example 1, and the anti-progressive collapse test constraint structure limits the displacement of the test component 5 in the first horizontal direction and the second horizontal direction.

[0055] In an embodiment of the present invention, the displacement of the test member 5 in the first horizontal direction is limited by setting the first limit assembly 2, and the displacement of the test member 5 in the second horizontal direction is limited by setting the second limit assembly 3, and the first horizontal direction and the second horizontal direction are perpendicular, so as to keep the test force uniform in the horizontal direction. During the anti-continuous collapse test, the test member 5 moves downward under the pressure in the vertical direction, and the test member 5 is limited by the first limit assembly 2 and the second limit assembly 3 to keep the vertical downward movement, thereby reducing the probability of the test member 5 overturning due to lateral displacement or torsion, thereby improving the success rate of the anti-continuous collapse test. In addition, the polytetrafluoroethylene plate is used in conjunction with lubricating oil to clamp the test member 5 in the horizontal direction to limit the displacement of the test member 5 in the horizontal direction, reduce the possibility of lateral displacement or torsion of the test member 5, and reduce the friction between the test member 5 and the polytetrafluoroethylene plate during the vertical downward movement, reduce the influence of the clamping member clamping the test member 5 on the test results, and improve the accuracy of the test results.

[0056] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A progressive collapse resistance test restraint structure, applied to a progressive collapse resistance test device, characterized in that: The anti-progressive collapse test device comprises a test component (5), wherein the test component (5) is a center column of a beam-column structure, and the anti-progressive collapse test restraint structure comprises: A base bottom plate (1), the base bottom plate (1) being fixedly connected to a test bench or the ground; two sets of first limit assemblies (2) arranged opposite to each other, the first limit assemblies (2) being fixedly connected to the base bottom plate (1), the first limit assemblies (2) being used to clamp the test component (5) in a first horizontal direction to limit the displacement of the test component (5) in the first horizontal direction; two sets of second limit assemblies (3) arranged opposite to each other, the second limit assemblies (3) being fixedly connected to the base bottom plate (1), the second limit assemblies (3) being used to clamp the test component (5) in a second horizontal direction to limit the displacement of the test component (5) in the second horizontal direction; The first horizontal direction is perpendicular to the second horizontal direction; During the progressive collapse resistance test, the test component (5) is capable of moving relative to the first limit assembly (2) and the second limit assembly (3) in a vertical force direction, wherein the vertical force direction is perpendicular to the first horizontal direction and the second horizontal direction.

2. The progressive collapse resistance test restraint structure according to claim 1, characterized in that: The first limiting assembly (2) comprises a limiting support member (21) and a fixed clamping member (22), wherein the limiting support member (21) is fixedly connected to the base bottom plate (1), and one side of the limiting support member (21) is connected to the fixed clamping member (22), and the fixed clamping member (22) is used to clamp the test component (5) to limit the displacement of the test component (5) in the first horizontal direction, and the fixed clamping member (22) and the test component (5) can move relative to each other in the above-mentioned vertical force direction.

3. The progressive collapse resistance test restraint structure according to claim 2, characterized in that: The fixed clamping member (22) is provided with a fixed back plate (221) and a clamping plate, one side of the fixed back plate (221) is fixedly connected to the side surface of the limiting support member (21), and the other side of the fixed back plate (221) is fixedly connected to the clamping plate, and a limiting strip (222) is provided on the fixed back plate (221), the limiting strip (222) and the fixed back plate (221) are integrally formed, and the limiting strip (222) is used to limit the displacement of the clamping plate; The clamping plate is a polytetrafluoroethylene plate, and is used to clamp the test component (5) to limit the displacement of the test component (5) in the first horizontal direction, and the clamping plate and the test component (5) can move relative to each other in the vertical force direction; During the progressive collapse resistance test, lubricating oil is provided between the clamping plate and the test component (5).

4. The progressive collapse resistance test restraint structure according to claim 3, characterized in that: The fixed back plate (221) and the clamping plate are both square plates; The width of the fixed back plate (221) is greater than or equal to the width of the limiting support member (21), the length of the fixed back plate (221) is less than or equal to the length of the limiting support member (21), and the length of the limiting strip (222) is equal to the length of the fixed back plate (221).

5. The progressive collapse resistance test restraint structure according to claim 1, characterized in that: The second limit assembly (3) comprises a movable clamping assembly (31) and two sets of track assemblies (32) arranged opposite to each other. The two sets of track assemblies (32) are respectively movably connected to the movable clamping assembly (31). The track assemblies (32) are used to limit the movement direction of the movable clamping assembly (31). The movable clamping assembly (31) is used to clamp the test component (5) to limit the displacement of the test component (5) in the second horizontal direction. The movable clamping assembly (31) moves together with the test component (5) in the above-mentioned vertical force direction.

6. The progressive collapse resistance test restraint structure according to claim 5, characterized in that: The track assembly (32) comprises two track members (321) arranged opposite to each other, each track member (321) being provided with a track plate (322), and a moving track (33) being formed between the track plates (322) corresponding to the two track members (321) arranged opposite to each other, and the moving track (33) being used to limit the moving direction of the movable clamping assembly (31).

7. The progressive collapse resistance test restraint structure according to claim 6, characterized in that: The movable clamping assembly (31) comprises: a clamping block (311), the clamping block (311) being used to clamp the test component (5); A horizontal connecting rod group, the horizontal connecting rod group comprising two horizontal connecting rods (312), the top surface and the bottom surface of the clamping block (311) being respectively connected to the side surface of one of the horizontal connecting rods (312); A movable assembly, the movable assembly comprising four roller groups (313), the two ends of each horizontal connecting rod (312) being respectively connected to a roller group (313), and the roller group (313) being movably connected to the track group (32); A vertical connecting rod group, the vertical connecting rod group comprising two vertical connecting rods (314), the vertical connecting rod (314) and the horizontal connecting rod (312) being perpendicular to each other in the same vertical plane, the two ends of the vertical connecting rod (314) being respectively connected to a roller group (313), and the two roller groups (313) connected to the same vertical connecting rod (314) being respectively connected to the two horizontal connecting rods (312).

8. The progressive collapse resistance test restraint structure according to claim 7, characterized in that: One end of each track plate (322) is provided with a track groove (3221), and the track grooves (3221) corresponding to the two track plates (322) arranged opposite to each other constitute the motion track (33); The roller assembly (313) comprises a roller column (315) and at least two roller units (316), and two opposite side surfaces of the roller column (315) are respectively connected to at least one roller unit (316); The roller unit (316) comprises a roller (3161), a screw (3162), a gasket (3163) and two roller supports (3164) arranged opposite to each other; the roller (3161) is rotatably mounted between the two roller supports (3164) via the screw (3162); the roller (3161) is provided with a connecting through hole; the roller support (3164) is provided with a mounting hole; the screw (3162) is passed through the roller (3161) via the connecting through hole; and both ends of the screw (3162) pass through the mounting holes and are connected to the roller supports (3164) via the gasket (3163); The roller (3161) is arranged in the track groove (3221), and the roller (3161) is in rolling contact with the bottom surface of the track groove (3221), and the roller (3161) can move up and down along the track groove (3221), and the track groove (3221) is used to guide the direction of the up and down movement of the roller (3161) and to limit the front and rear displacement of the roller (3161); Two roller supports (3164) arranged opposite to each other are located outside two outer side walls of the corresponding track plate (322), and the roller supports (3164) are used to limit the front-rear displacement of the roller (3161) when the roller (3161) moves up and down.

9. The progressive collapse resistance test restraint structure according to any one of claims 1 to 8, characterized in that: The anti-progressive collapse test restraint structure further comprises a support assembly (4), wherein the support assembly (4) comprises at least one first support member (41) and at least one second support member (42); One end of the first support member (41) is connected to the base bottom plate (1), and the other end of the first support member (41) is connected to the first limit assembly (2); One end of the second support member (42) is connected to the base bottom plate (1), and the other end of the second support member (42) is connected to the second limit assembly (3).

10. A progressive collapse resistance test device, characterized in that: The anti-progressive collapse test device comprises a test member (5) and an anti-progressive collapse test restraint structure according to any one of claims 1 to 9, wherein the anti-progressive collapse test restraint structure limits the displacement of the test member (5) in the first horizontal direction and the second horizontal direction.

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