Dynamic test device for beam-column substructure resistance to progressive collapse

Abstract

The application provides a beam-column substructure anti-continuous collapse dynamic test device, which comprises a supporting unit, a control unit and a bearing seat, the supporting unit comprises a plurality of supporting assemblies arranged at intervals, the control unit comprises a plurality of control assemblies arranged in one-to-one correspondence with the supporting assemblies, the control assemblies are rotationally connected to the supporting assemblies, and the control assemblies rotate around their own axes; the bearing seat is connected to the control unit; the control assembly has a supporting state of providing a supporting force for the bearing seat and a collapse state of rotating around its own axis to make the bearing seat fall. The beam-column substructure anti-continuous collapse dynamic test device provided by the application aims to solve the problems that the static test in the prior art cannot truly reflect the influence of the dynamic characteristics after the sudden failure of a column on the structural performance, and that the impact test is inconvenient to operate in a laboratory.

Description

Technical Field

[0001] This invention belongs to the technical field of building structure collapse resistance testing devices, and more specifically, relates to a dynamic testing device for beam-column structure resistance to progressive collapse. Background Technology

[0002] Structural collapses caused by natural disasters and terrorist attacks often result in enormous casualties and property damage, making the design of structures to withstand progressive collapse crucial. With proper progressive collapse design, when accidental loads cause localized structural failure, the structure can redistribute internal forces through backup load paths, preventing further damage and minimizing casualties and structural damage. However, this ability to resist progressive collapse often requires experimental verification.

[0003] While there has been considerable research both domestically and internationally on the progressive collapse resistance of building structures, most studies have employed static tests, with relatively few dynamic tests. However, in real-world engineering cases, the sudden failure of columns leading to localized damage when subjected to accidental loads such as explosions or impacts is a dynamic process. Therefore, existing static test techniques cannot reflect the impact of dynamic characteristics following sudden beam-column failure on structural performance.

[0004] Furthermore, existing progressive collapse resistance testing devices mostly simulate sudden failure of support columns through impact, but the test support columns cannot be reused after being impacted, resulting in high testing risks and costs, as well as a large space requirement. In addition, the limited space in the laboratory makes impact-based simulation tests not only difficult to operate but also prone to danger. Summary of the Invention

[0005] The purpose of this invention is to provide a dynamic testing device for beam-column structures to resist progressive collapse, which aims to solve the problems that static tests in the prior art cannot truly reflect the impact of the dynamic characteristics of columns after sudden failure on structural performance, and that impact tests are inconvenient to operate in the laboratory.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a dynamic testing device for the progressive collapse resistance of beam-column structures, comprising:

[0007] The support unit includes multiple support components spaced at intervals;

[0008] The control unit includes a plurality of control components corresponding one-to-one with the support component, the control components being rotatably connected to the support component and rotating about their own axes; and

[0009] The load-bearing base is connected to the control unit;

[0010] The control component has a supporting state that provides support to the load-bearing seat, and a collapsing state that rotates around its own axis to cause the load-bearing seat to fall.

[0011] In one possible implementation, the support component includes a support column, and the control component includes a switching hole corresponding to the support column, with a support block disposed within the switching hole; when the control component is in the supported state, the support column abuts against the support block; when the control component is in the collapsed state, the support column separates from the support block and is inserted into the switching hole.

[0012] In one possible implementation, the support component includes:

[0013] The support mechanism includes a support plate and a connector disposed on the support plate; and

[0014] The switching mechanism includes the support column and a fixing plate inserted into the connector, wherein the support column is disposed on the fixing plate.

[0015] In one possible implementation, the support mechanism further includes a plurality of reinforcing plates arranged around the connector, the reinforcing plates being connected to the support plate, and the fixing plate being located above the reinforcing plates and abutting against the reinforcing plates.

[0016] In one possible implementation, the control component includes:

[0017] The control base has the switching hole provided, and the control base also has a connection hole adapted to the connector, the connection hole being inserted and engaged with the connector; and

[0018] A drive rod is connected to the outer peripheral surface of the control base.

[0019] In one possible implementation, the outer peripheral surface of the control seat is provided with a hinge seat, and the drive rod is hinged to the hinge seat about a first axis, the first axis being perpendicular to the axis of the control seat.

[0020] In one possible implementation, multiple support components are sequentially arranged along a first path to form a support module, and multiple sets of support modules are sequentially arranged along a second path, wherein the first path is perpendicular to the second path. The control unit further includes a linkage rod, and multiple drive rods on the same set of support modules are respectively connected to the linkage rod. The linkage rod is used to control the control seat to switch from the support state to the collapse state.

[0021] In one possible implementation, the linkage rod has a connecting groove, the drive rod is inserted into the connecting groove, and the drive rod and the linkage rod are rotatably connected by a rotating shaft.

[0022] In one possible implementation, the beam-column structure anti-progressive collapse dynamic test device further includes a base, and the support assembly is detachably connected to the base.

[0023] In one possible implementation, the base has a first connecting hole, and the support assembly has a second connecting hole corresponding to the first connecting hole. The first connecting hole and the second connecting hole are connected by a threaded connector.

[0024] The beneficial effects of the beam-column structure progressive collapse dynamic testing device provided by this invention are as follows: Compared with the prior art, the beam-column structure progressive collapse dynamic testing device of this invention places the beam-column structure on a load-bearing base. Before the test begins, the control component is in a supported state, at which time the beam-column structure is stable. When the test begins, the drive control component rotates around its own axis, causing the control component to switch to the collapse state, and the beam-column structure on the load-bearing base collapses accordingly. The solution in this invention uses rotation to switch the control component from the supported state to the collapse state, which is more convenient to operate than impact testing, and is safer when conducting tests in a limited space, avoiding the dangers that may occur during impact. In addition, setting up multiple support components increases the supporting force on the beam-column structure, making the entire testing device more stable in the supported state. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the dynamic testing device for beam-column structure resistance to progressive collapse provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the control unit and support unit used in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the support mechanism used in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the control base used in an embodiment of the present invention;

[0030] Figure 5 This is a three-dimensional structural diagram of the load-bearing base used in an embodiment of the present invention.

[0031] In the picture:

[0032] 1. Support component; 101. Support mechanism; 1011. Reinforcing plate; 1012. Connector; 1013. Support plate; 1014. First fixing hole; 102. Switching mechanism; 1021. Support column; 1022. Fixing plate; 1023. Limiting groove;

[0033] 2. Base;

[0034] 3. Control components; 301. Control base; 3011. Switching hole; 302. Drive rod; 303. Hinge; 304. Support block;

[0035] 4. Load-bearing base; 401. Guide hole; 402. Weight reduction hole; 403. Pressure detector;

[0036] 5. Fixing base; 501. Limiting hole;

[0037] 6. Beam-column structure; 601. Supporting column; 602. Beam;

[0038] 7. Limit block;

[0039] 8. Linkage rod. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0041] In the claims, description, and accompanying drawings of this invention, unless otherwise expressly defined, the terms "first," "second," or "third," etc., are used to distinguish different objects and not to describe a specific order. Unless otherwise stated, other directional terms, such as "vertical," "clockwise," and "counterclockwise," indicate orientation or positional relationships based on the orientation and positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, not to indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention. In the claims, description, and accompanying drawings of this invention, unless otherwise expressly defined, the terms "fixed connection" or "fixed link" should be interpreted broadly, that is, any connection method in which there is no displacement relationship or relative rotation relationship between the two, that is, including non-removable fixed connections, detachable fixed connections, integral connections, and fixed connections through other devices or elements. In the claims, description, and accompanying drawings of this invention, the terms "comprising," "having," and their variations are intended to mean "including but not limited to."

[0042] It should be noted that high-rise building structures should possess appropriate resistance to progressive collapse under accidental loads. Progressive collapse refers to the failure of a structure due to accidental loads from a sudden event, leading to localized structural damage and subsequent widespread, disproportionate damage. After localized component failure, the damage can spread horizontally and vertically, with the vertical spread being more pronounced. When accidental factors cause localized structural failure, if the overall structure cannot establish effective multiple load transfer paths, the damage can propagate horizontally and vertically, ultimately leading to widespread or even complete structural collapse.

[0043] Please see Figure 1 The present invention will now describe the dynamic testing device for progressive collapse resistance of beam-column structures. The dynamic testing device for progressive collapse resistance of beam-column structures includes a support unit, a control unit, and a load-bearing base 4. The support unit includes multiple spaced support components 1; the control unit includes multiple control components 3 corresponding one-to-one with the support components 1, the control components 3 being rotatably connected to the support components 1 and rotating around their own axes; the load-bearing base 4 is connected to the control unit.

[0044] The control component 3 has a supporting state that provides support to the load-bearing seat 4, and a collapsing state in which the load-bearing seat 4 falls down due to rotation around its own axis.

[0045] The dynamic testing device for progressive collapse resistance of beam-column structures provided by this invention, compared with the prior art, places the beam-column structure 6 on the load-bearing base 4. Before the test begins, the control component 3 is in a supported state, at which time the beam-column structure 6 is stable. At the start of the test, the control component 3 is driven to rotate around its own axis, switching to the collapse state, causing the beam-column structure 6 on the load-bearing base 4 to collapse. The solution in this invention uses rotation to switch the control component 3 from the supported state to the collapse state, which is more convenient to operate than impact testing and safer when conducting tests in a limited space, avoiding the dangers of impact. Furthermore, the multiple support components 1 increase the supporting force on the beam-column structure 6, making the entire testing device more stable in the supported state.

[0046] It should be noted that "beam-column substructure" refers to a part of a building structure. Existing progressive collapse tests mainly target beam-column substructures. The test model typically consists of two beams and one or three columns. By removing the intermediate column to simulate local failure, the load-bearing mechanisms (bending resistance, arching resistance, catenary mechanism) of beams and beam-column joints against progressive collapse are studied. The beam-column substructure in this application mainly includes a support column 601 and a beam 602 connected to the support column 601, wherein the support column 601 is connected to a support unit.

[0047] In some embodiments, please refer to Figures 1 to 4 The support component 1 includes a support column 1021, and the control component 3 includes a switching hole 3011 corresponding to the support column 1021. A support block 304 is provided in the switching hole 3011. When the control component 3 is in the support state, the support column 1021 abuts against the support block 304. When the control component 3 is in the collapsed state, the support column 1021 separates from the support block 304 and is inserted into the switching hole 3011.

[0048] In the supported state, the support column 1021 abuts against the support block 304, providing support force to the beam-column substructure 6 and maintaining its stability. During the test, the control component 3 is rotated, causing the support column 1021 to rotate within the switching hole 3011 until it separates from the support block 304 and engages with the switching hole 3011. At this point, it loses its support force on the beam-column substructure 6, causing it to collapse after losing support in the vertical direction. The scheme in this embodiment uses a simple structure to simulate the collapse of the beam-column substructure 6 under stress, realistically reproducing the dynamic process of switching from the supported state to the collapsed state, which is beneficial for in-depth research on continuous collapse tests.

[0049] Optionally, the switching hole 3011 is an arc-shaped hole.

[0050] In some embodiments, please refer to Figures 1 to 2 The support assembly 1 includes a support mechanism 101 and a switching mechanism 102. The support mechanism 101 includes a support plate 1013 and a connector 1012 disposed on the support plate 1013. The switching mechanism 102 includes a support column 1021 and a fixing plate 1022 inserted into the connector 1012. The support column 1021 is disposed on the fixing plate 1022.

[0051] The connector 1012 is mounted on the support plate 1013, which contacts the support surface and provides support force to the upper switching mechanism 102 and control assembly 3, increasing the stability of the support. In addition, if the connection stability between the support plate 1013 and the support surface is increased, the support plate 1013 is easier to drill or weld than the connector 1012, making it easier to process.

[0052] Specifically, the surface area of ​​the support plate 1013 is greater than the end face area of ​​the connector 1012.

[0053] Optionally, the fixing plate 1022 is a ring-shaped component, and the connector 1012 is inserted into the inner ring of the fixing plate 1022. The fixing plate 1022 and the connector 1012 can be fixed by welding.

[0054] In some embodiments, please refer to Figure 3The support mechanism 101 also includes a plurality of reinforcing plates 1011 arranged around the connector 1012. The reinforcing plates 1011 are connected to the support plate 1013. The fixing plate 1022 is located above the reinforcing plates 1011 and abuts against the reinforcing plates 1011.

[0055] After the fixing plate 1022 is inserted into the connector 1012, the reinforcing plate 1011 provides support for the fixing plate 1022, which is more stable than the solution where the fixing plate 1022 is fixed by the connector 1012. Moreover, the solution in this embodiment does not require welding or other methods to connect the reinforcing plate 1011 and the fixing plate 1022, making it easier to disassemble and reassemble, and allowing for reuse.

[0056] Optionally, the fixing plate 1022 is provided with a limiting groove 1023 corresponding to the reinforcing plate 1011, and the limiting groove 1023 is inserted into the reinforcing plate 1011. After the fixing plate 1022 is connected to the reinforcing plate 1011, the fixing plate 1022 is constrained in the circumferential direction, thereby improving the stability of the fixing plate 1022.

[0057] In some embodiments, please refer to Figures 1 to 2 The control component 3 includes a control base 301 and a drive rod 302. The control base 301 has a switching hole 3011 and a connection hole adapted to the connector 1012. The connection hole and the connector 1012 are inserted into each other. The drive rod 302 is connected to the outer peripheral surface of the control base 301.

[0058] The control base 301 is rotated by manipulating the drive rod 302, which is more convenient than directly rotating the control base 301. It also makes it easier to control the point of force application. By utilizing the lever principle, the force required to rotate the control base 301 is saved, which reduces the skill requirements for the operator and facilitates testing. In addition, the connecting hole on the control base 301 is inserted and fitted with the connector 1012, which limits the control base 301 radially and improves its stability.

[0059] In some embodiments, please refer to Figures 1 to 2 The outer peripheral surface of the control seat 301 is provided with a hinge seat 303, and the drive rod 302 is hinged to the hinge seat 303 around a first axis, which is perpendicular to the axis of the control seat 301.

[0060] The drive rod 302 is hinged to the hinge seat 303. When the drive rod 302 is pulled, it first rotates around the first axis and then drives the control seat 301 to rotate. In this embodiment, the solution provides a buffer time by rotating the drive rod 302 first and then driving the control seat 301 to rotate after applying force to the drive rod 302. Compared with the case of a rigid connection between the drive rod 302 and the control seat 301, this ensures the tightness of the connection and avoids connection failure after long-term stress.

[0061] In some embodiments, please refer to Figure 1 Multiple support components 1 are arranged sequentially along the first path to form a support module. Multiple sets of support modules are arranged sequentially along the second path. The first path is perpendicular to the second path. The control unit also includes a linkage rod 8. Multiple drive rods 302 on the same set of support modules are respectively connected to the linkage rod 8. The linkage rod 8 is used to control the control seat 301 to switch from the support state to the collapse state.

[0062] By using linkage rod 8 to connect the support modules, pulling linkage rod 8 during the test can synchronously switch all support components 1 in the same support module to the collapsed state, which is more convenient to operate and avoids the inability of multiple support components 1 to switch states synchronously due to drive delay, thus affecting the test results.

[0063] In some embodiments, please refer to Figures 1 to 2 A connecting groove is provided on the linkage rod 8, and the drive rod 302 is inserted into the connecting groove. The drive rod 302 and the linkage rod 8 are rotatably connected through a rotating shaft.

[0064] The drive rod 302 and the linkage rod 8 are connected by a rotating shaft. When the linkage rod 8 is pulled, the linkage rod 8 moves and drives the rotating shaft to rotate. When the linkage rod 8 moves to the point where the drive rod 302 contacts the inner wall of the connecting groove, the linkage rod 8 is pulled further. Under the action of the contact force, the drive rod 302 rotates, thereby driving the control seat 301 to rotate. In this embodiment, the solution provides a certain buffer time for the drive rod 302 when the linkage rod 8 initially moves, avoiding the pulling force from directly acting on the drive rod 302 and causing the connection between the drive rod 302 and the linkage rod 8 to break, thus improving the service life of the drive rod 302.

[0065] In some embodiments, please refer to Figure 1 The dynamic test device for beam-column structure resistance to progressive collapse also includes a base 2, and the support component 1 is detachably connected to the base 2.

[0066] The support component 1 and the base 2 are designed to be detachably connected, which avoids the inconvenience of moving the support component 1 after it is fixed to the ground or other support surfaces, thus limiting the test position. Moreover, the detachable structure can be disassembled and stored after the test is completed, enabling reuse and reducing the test cost.

[0067] In some embodiments, please refer to Figures 1 to 3 The base 2 has a first connecting hole, and the support component 1 has a second connecting hole corresponding to the first connecting hole. The first connecting hole and the second connecting hole are connected by a threaded connector 1012.

[0068] Drilling a first connecting hole on the base 2 and a second connecting hole on the support component 1 is a convenient method for processing. Using a threaded connector 1012 to connect the base 2 and the support component 1 facilitates the installation or disassembly of the base 2 and the support component 1, improves the efficiency of installation or disassembly, and does not damage the base 2 or the support component 1.

[0069] Optionally, the threaded connector 1012 can be a bolt or screw.

[0070] For one specific implementation of the weighing stand, please refer to Figure 5 The support base 4 has a guide hole 401 that is adapted to the connector 1012, and the guide hole 401 is inserted into the connector 1012.

[0071] The guide hole 401 radially limits the connection 1012, improving the stability of the load-bearing seat 4 without the need for external connection 1012.

[0072] As another implementation method of the dynamic testing device for the progressive collapse resistance of beam-column structures, please refer to Figure 1 The load-bearing seat 4 is provided with a fixed seat 5. The beam-column structure anti-progressive collapse dynamic test device also includes a limiting block 7. The fixed seat 5 is provided with a limiting hole 501. The limiting block 7 is inserted into the limiting hole 501. The limiting block 7 is used to limit the beam-column structure 6.

[0073] The beam-column substructure 6 is placed on the fixed base 5. Limiting blocks 7 are installed around the outer periphery of the support column 601, and these blocks are inserted into corresponding limiting holes 501. The limiting blocks 7 limit the support column 601, simulating the constraint forces exerted on the support column 601 by the surrounding structure in reality. This embodiment eliminates the need for drilling holes in the beam-column substructure 6, ensuring its strength while reducing processing difficulty.

[0074] Optionally, the fixing base 5 is provided with multiple limiting holes 501.

[0075] Optionally, the limiting block 7 can be a hexahedral structure or an arc-shaped block structure to adapt to beam and column structures 6 of different shapes.

[0076] Optionally, the limiting block 7 is provided with an insert that is adapted to the limiting hole 501, and the insert is inserted into the limiting hole 501.

[0077] Optionally, the fixing base 5 is provided with a first fixing hole 1014, and the load-bearing base 4 is provided with a second fixing hole that matches the first fixing hole 1014. The first fixing hole 1014 and the second fixing hole are connected by bolts.

[0078] Optionally, a pressure detector 403 is provided on the load-bearing seat 4.

[0079] Optionally, the load-bearing base 4 is provided with a weight-reducing hole 402.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for dynamic testing of progressive collapse resistance of beam-column subassemblies, characterized by, The application relates to a beam-column substructure anti-continuous collapse dynamic test device. The device comprises a support unit, a control unit and a bearing seat. The support unit comprises a plurality of support assemblies arranged at intervals. The control unit comprises a plurality of control assemblies corresponding to the support assemblies. The control assemblies are rotationally connected to the support assemblies and rotate around their own axes. The control assemblies have a support state for providing support force to the bearing seat and a collapse state for rotating around their own axes to make the bearing seat fall. The support assemblies comprise support columns.

2. The beam-column substructure progressive collapse resistance dynamic testing device of claim 1, wherein, The control assemblies comprise switching holes corresponding to the support columns. The switching holes are provided with support blocks. When the control assemblies are in the support state, the support columns abut against the support blocks.

3. The beam-column substructure progressive collapse dynamic testing device of claim 2, wherein, When the control assemblies are in the collapse state, the support columns are separated from the support blocks and are inserted into the switching holes.

4. The beam-column substructure progressive collapse dynamic testing device of claim 2, wherein, The support assemblies comprise a support mechanism and a switching mechanism. The support mechanism comprises a support plate and a connecting piece arranged on the support plate. The switching mechanism comprises the support columns and a fixing plate inserted into the connecting piece.

5. The beam-column substructure progressive collapse resistance dynamic testing device of claim 4, wherein, The support columns are arranged on the fixing plate.

6. The beam-column sub-structure progressive collapse resistance dynamic testing device of claim 4, wherein, The support mechanism further comprises a plurality of reinforcing plates arranged around the connecting piece.

7. The beam-column substructure progressive collapse resistance dynamic testing device of claim 6, wherein, The reinforcing plates are connected to the support plate.

8. The beam-column sub-structure progressive collapse resistance dynamic testing device of claim 1, wherein, The fixing plate is located above the reinforcing plates and abuts against the reinforcing plates.

9. The beam-column sub-structure progressive collapse resistance dynamic testing device of claim 8, wherein, The control assemblies comprise a control seat and a driving rod. The control seat is provided with the switching holes and connecting holes matched with the connecting pieces. The connecting holes are inserted into the connecting pieces. The driving rod is connected to the outer circumferential surface of the control seat. The outer circumferential surface of the control seat is provided with a hinge seat. The driving rod is hingedly connected to the hinge seat around a first axis. The first axis is perpendicular to the axis of the control seat. A plurality of the support assemblies are arranged along a first path to form a support module. The support module is provided with a plurality of groups along a second path. The first path is perpendicular to the second path. The control unit further comprises a linkage rod. The driving rods on the same group of the support modules are respectively connected to the linkage rod. The linkage rod is used for controlling the control seat to switch from the support state to the collapse state. The linkage rod is provided with a connecting groove. The driving rod is inserted into the connecting groove. The driving rod and the linkage rod are rotationally connected through a rotating shaft. The beam-column substructure anti-continuous collapse dynamic test device further comprises a base. The support assemblies are detachably connected to the base. The base is provided with a first connecting hole. The support assemblies are provided with a second connecting hole corresponding to the first connecting hole. The first connecting hole and the second connecting hole are connected through a threaded connecting piece.

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