Self-locking beam-column connection node and connection method

Abstract

The application discloses a self-locking beam-column connecting joint and a connecting method, and belongs to the technical field of fabricated steel structure building structures. The self-locking beam-column connecting joint comprises a beam connecting assembly, a column connecting assembly and a fastening assembly. The beam connecting assembly is provided with a pressure transmission block and an insertion plate with a strip-shaped hole. The column connecting assembly comprises an end plate, a supporting block and a self-locking piece composed of a connecting piece, a movable piece and a spring. The fastening assembly adopts an angle steel to realize double reinforcement. During installation, the horizontal beam is vertically placed downward, the insertion plate is inserted into the insertion slot, the movable piece is automatically clamped into the strip-shaped hole under the action of the spring to complete self-locking, and then the angle steel is fixed. During disassembly, the movable piece is unlocked by means of an operating rod, and then the horizontal beam can be lifted away. The application has the advantages of high construction efficiency, less high-altitude operation, stable joint stress, good shearing and seismic resistance, simple structure, convenient disassembly and reusability, and is suitable for the use requirement of modularized fabricated buildings.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, and in particular to a self-locking beam-column connection node and connection method. Background Technology

[0002] In prefabricated steel structure construction, beam-column connections are core components ensuring the structural integrity and stress stability. Current mainstream beam-column connection methods suffer from the following drawbacks: Welded connections: Extensive on-site wet work, low construction efficiency, welding quality greatly affected by environment and human factors, and difficult post-earthquake repair; All-bolted connections: Require precise alignment and individual tightening, complex and risky high-altitude operations, and long construction period; Ordinary mortise and tenon connections: Rely solely on structural interlocking without an active locking mechanism, resulting in insufficient connection rigidity and susceptibility to loosening and detachment; Existing nodes with locking functions: Complex structure, installation requires specialized tools, cannot achieve automatic locking, and are difficult to disassemble and reuse, making them unsuitable for the reusable requirements of modular buildings. Summary of the Invention

[0003] The purpose of this invention is to provide a self-locking beam-column connection node and connection method, which enables rapid beam-column connection with self-locking, convenient assembly and disassembly, reliable stress distribution, and reusability.

[0004] To achieve the above objectives, the present invention provides a self-locking beam-column connection node, comprising a beam connection assembly, a column connection assembly, and a fastening assembly; the beam connection assembly includes a pressure-transmitting block and an insert plate, the upper end of the pressure-transmitting block being fixed to the lower sidewall of the beam, the insert plate being vertically arranged and its upper end being fixed to the lower sidewall of the beam, and the insert plate surface having horizontally arranged strip holes; the column connection assembly includes an end plate, a support block, and a self-locking component, the end plate being horizontally installed on the upper end of the column, and the support block being vertically fixed to the upper surface of the end plate, with its upper end connected to the lower end of the pressure-transmitting block. The fastening assembly includes a connector, a movable part, and a spring. The connector is fixed to the end plate and has a slot with a first groove sidewall and a second groove sidewall. The insert plate is vertically inserted into the slot. The movable part is located in the slot and its upper end is rotatably connected to the first groove sidewall. The spring is located between the movable part and the first groove sidewall, and its two ends abut against the movable part and the first groove sidewall, respectively. The lower end of the movable part can be inserted into the strip hole and abut against the lower inner wall of the strip hole. The fastening assembly includes an angle steel, which is fixed to both the crossbeam and the end plate.

[0005] Preferably, the crossbeam is an I-beam, the column is a box-shaped column with an open top, and the end plate is sealed and fixed to the upper end of the column.

[0006] Preferably, the angle steel is a symmetrical angle steel with unequal sides, and is symmetrically arranged on both sides of the web of the crossbeam. The horizontal leg of the angle steel is tightly fixed to the lower flange of the crossbeam, and the vertical leg of the angle steel is tightly fixed to the outer wall of the end plate.

[0007] Preferably, the cross-sections of the pressure transmitting block and the support block are both circular or polygonal.

[0008] Preferably, there are multiple insert plates, which are evenly arranged on the outer periphery of the pressure transmission block; there are multiple connectors, which are evenly arranged on the outer periphery of the support block, with the second groove sidewall arranged close to the support block, and the multiple insert plates are respectively inserted into the slots of the multiple connectors.

[0009] Preferably, the self-locking component further includes a first limiting post and a second limiting post, the first limiting post being fixed to the movable component, the second limiting post being fixed to the side wall of the first groove, and the two ends of the spring being respectively sleeved on the first limiting post and the second limiting post.

[0010] Preferably, the self-locking component further includes an operating rod, the movable component is provided with a threaded hole, one end of the operating rod is provided with an external thread and screwed into the threaded hole; a notch is opened on the side wall of the first groove, and the operating rod is limited to the inside of the notch.

[0011] The present invention also includes a self-locking beam-column connection method, comprising the following steps: S1. Prefabricated assembly: Fix the pressure transmission block and insert plate to the lower side wall of the crossbeam, and fix the end plate, support block and self-locking component to the upper end of the column. S2. Alignment and self-locking: The hoisting beam is lowered vertically so that the insert plate is inserted into the slot of the connector. The insert plate pushes the movable part to rotate until the pressure block and the support block are pressed together. The spring drives the movable part to reset, and the lower end of the movable part is inserted into the strip hole of the insert plate to complete the beam-column self-locking connection. S3. Fastening and reinforcement: Fix the angle steel to both the beam and the end plate simultaneously to complete the beam-column joint connection.

[0012] Preferably, the disassembly step is also included: screwing the operating rod into the threaded hole of the movable part, turning the operating rod through the notch to drive the movable part to rotate, so that the lower end of the movable part is disengaged from the strip hole, and the vertically hoisted crossbeam is disassembled.

[0013] Therefore, the present invention, by employing the above-mentioned self-locking beam-column connection node and connection method, has the following technical advantages: (1) The present invention can achieve automatic clamping and locking by vertical displacement of the beam, without the need for complex alignment and special tools, greatly reducing the high-altitude operation process, reducing the construction difficulty, and improving the construction efficiency of prefabricated beams and columns.

[0014] (2) The pressure transmission block and support block of the present invention accurately transmit vertical loads, the self-locking component effectively prevents the crossbeam from moving upward and falling off, and the angle steel forms double reinforcement, improving the shear resistance, tensile resistance and seismic performance of the node, and avoiding stress concentration.

[0015] (3) The node structure of the present invention is simple and can be quickly unlocked and disassembled by operating lever without structural damage. It is convenient for later maintenance and secondary reuse and is suitable for the needs of modular building reuse.

[0016] (4) This invention is suitable for conventional prefabricated steel structure systems with I-beams and box columns, with uniform force transmission, good overall node integrity, and wide applicability.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a self-locking beam-column connection node according to the present invention; Figure 2 This is the first exploded isometric view of a self-locking beam-column connection node according to the present invention; Figure 3 This is a second exploded isometric view of a self-locking beam-column connection node according to the present invention; Figure 4 This is a first partial isometric view of a self-locking beam-column connection node according to the present invention; Figure 5 This is a second partial isometric view of a self-locking beam-column connection node according to the present invention; Figure 6 This is a partial structural cross-sectional view of a self-locking beam-column connection node according to the present invention.

[0019] Figure Labels 1. Pressure transmission block; 2. Insert plate; 20. Strip hole; 3. End plate; 4. Support block; 5. Connector; 50. Slot; 51. Notch; 6. Moving part; 60. Threaded hole; 7. Spring; 8. Limiting post one; 9. Limiting post two; 10. Operating rod; 11. Angle steel; 12. Crossbeam; 13. Column. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figures 1 to 6 As shown, a self-locking beam-column connection node includes a beam connection component, a column connection component, and a fastening component.

[0023] The beam connection assembly includes a pressure transmission block 1 and an insert plate 2. The upper end of the pressure transmission block 1 is welded and fixed to the lower side wall of the crossbeam 12. The insert plate 2 is arranged vertically and its upper end is welded and fixed to the lower side wall of the crossbeam 12. The insert plate 2 has horizontally arranged strip holes 20. In this embodiment, the insert plate 2 is a rectangular piece and there are four of them, which are evenly arranged on the outer periphery of the pressure transmission block 1.

[0024] The column connection assembly includes an end plate 3, a support block 4, and a self-locking component. The end plate 3 is horizontally sealed and welded to the upper end of the column 13, which is a box-shaped column with an open top. The support block 4 is vertically welded to the upper surface of the end plate 3, and its upper end is close to the lower end of the pressure transmission block 1. Both the pressure transmission block 1 and the support block 4 have rectangular cross-sections to ensure stable transmission of vertical loads.

[0025] The self-locking component includes a connector 5, a movable component 6, a spring 7, a first limiting post 8, a second limiting post 9, and an operating rod 10. The connector 5 is welded to the upper surface of the end plate 3, and there are four of them, which are evenly arranged on the outer periphery of the support block 4. The connector 5 has a slot 50 with a first groove sidewall and a second groove sidewall. The second groove sidewall is arranged close to the support block 4, and the insert plate 2 is vertically inserted into the slot 50.

[0026] The movable part 6 is located in the slot 50, and its upper end is rotatably connected to the side wall of the first slot. The rotation axis is arranged horizontally. The spring 7 is located between the movable part 6 and the side wall of the first slot. The first limiting post 8 is fixed to the movable part 6, and the second limiting post 9 is fixed to the side wall of the first slot. The two ends of the spring 7 are respectively sleeved on the first limiting post 8 and the second limiting post 9 to ensure that the spring 7 works stably.

[0027] The lower end of the movable part 6 can be inserted into the strip hole 20 and abut against the inner wall of the strip hole 20, restricting the vertical displacement of the crossbeam 12; the movable part 6 is provided with a threaded hole 60, one end of the operating rod 10 is provided with an external thread and screwed into the threaded hole 60, and a notch 51 is opened on the side wall of the first groove, and the operating rod 10 is limited to the inside of the notch 51, which is convenient for external operation to unlock.

[0028] The fastening assembly includes two unequal angle steels 11 symmetrically arranged on both sides of the web of the crossbeam 12. The angle steels 11 are arranged laterally. In this embodiment, the specific fixing method is as follows: the lower flange of the crossbeam 12 has two through holes 1, and the horizontal leg of the angle steel 11 has a through hole 2. The through holes 1 and 2 are vertically aligned. One end of the bolt 1 passes through the through holes 2 and 1 in sequence and is screwed into the nut 1. The vertical leg of the angle steel 11 is tightly fixed to the outer side wall of the end plate 3. The vertical leg of the angle steel 11 has a through hole 3. One outer side wall of the end plate 3 has a threaded blind hole. The through hole 3 and the threaded blind hole are horizontally aligned. One end of the bolt 2 passes through the through hole 3 and is screwed into the threaded blind hole, forming a double reinforcement.

[0029] A self-locking beam-column connection method, based on the aforementioned self-locking beam-column connection node, includes the following steps: S1. Prefabrication and assembly: In the factory, pressure transmission block 1, insert plate 2 and I-beam type crossbeam 12 are welded and fixed; end plate 3, support block 4, self-locking part and box-type column 13 are welded and fixed to complete the component prefabrication; S2. Alignment and self-locking: The horizontal beam 12 is hoisted and placed vertically downwards at the construction site, so that the insert plate 2 is accurately inserted into the slot 50 of the connector 5. The lower end of the insert plate 2 pushes the movable part 6 to rotate around the axis until the pressure block 1 and the support block 4 are completely pressed together. The spring 7 drives the movable part 6 to automatically reset and the lower end is inserted into the strip hole 20, completing the automatic self-locking connection of the beam and column. S3. Fastening and reinforcement: Install the two unequal angle steels 11 symmetrically on both sides of the web of the crossbeam 12, and fix the angle steels 11 to the lower flange plate and end plate 3 of the crossbeam 12 with bolts to complete the final connection of the node.

[0030] When disassembly, reuse, or maintenance is required, screw the operating lever 10 into the threaded hole 60 of the movable part 6, and turn the operating lever 10 through the notch 51 of the connector 5 to rotate the movable part 6, so that the lower end of the movable part 6 is disengaged from the strip hole 20. The vertically hoisted beam 12 can then be disassembled, and all components can be completely recycled for reuse.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A self-locking beam-column connection node, characterized in that: It includes a beam connection assembly, a column connection assembly, and a fastening assembly; the beam connection assembly includes a pressure transmitting block and an insert plate, the upper end of the pressure transmitting block is fixed to the lower side wall of the crossbeam, the insert plate is arranged vertically and its upper end is fixed to the lower side wall of the crossbeam, and the insert plate surface is provided with transversely arranged strip holes. The column connection assembly includes an end plate, a support block, and a self-locking component. The end plate is horizontally installed on the upper end of the column, and the support block is vertically fixed to the upper surface of the end plate with its upper end close to the lower end of the pressure transmission block. The self-locking component includes a connector, a movable component, a spring, and an operating rod. The connector is fixed to the upper surface of the end plate and has a slot with a first groove sidewall and a second groove sidewall. The insert plate is vertically inserted into the slot. The movable component is located in the slot and its upper end is rotatably connected to the first groove sidewall. The spring is located between the movable component and the first groove sidewall, and its two ends abut against the movable component and the first groove sidewall, respectively. The lower end of the movable component is inserted into the strip hole and abuts against the lower inner wall of the strip hole. The fastening assembly includes an angle steel, which is simultaneously fixed to both the crossbeam and the end plate.

2. The self-locking beam-column connection node according to claim 1, characterized in that: The crossbeam is an I-beam, and the column is a box-shaped column with an open top, with end plates sealed and fixed to the upper end of the column.

3. The self-locking beam-column connection node according to claim 1, characterized in that: The angle steel is a symmetrical angle steel with unequal sides, and is symmetrically arranged on both sides of the web of the crossbeam. The horizontal leg of the angle steel is tightly fixed to the lower flange of the crossbeam, and the vertical leg of the angle steel is tightly fixed to the outer wall of the end plate.

4. A self-locking beam-column connection node according to claim 1, characterized in that: Both the pressure transmitting block and the support block have circular or polygonal cross-sections.

5. A self-locking beam-column connection node according to claim 1, characterized in that: The insert plate is provided in multiple ways, and the multiple insert plates are evenly arranged on the outer periphery of the pressure transmission block; the connector is provided in multiple ways, and the multiple connectors are evenly arranged on the outer periphery of the support block. The second groove sidewall is arranged close to the support block, and the multiple insert plates are respectively inserted into the slots of the multiple connectors.

6. A self-locking beam-column connection node according to claim 1, characterized in that: The self-locking component also includes a first limiting post and a second limiting post. The first limiting post is fixed to the movable part, and the second limiting post is fixed to the side wall of the first groove. The two ends of the spring are respectively sleeved on the first limiting post and the second limiting post.

7. A self-locking beam-column connection node according to claim 1, characterized in that: The movable part is provided with a threaded hole, and one end of the operating rod is provided with an external thread and screwed into the threaded hole; a notch is opened on the side wall of the first groove, and the operating rod is limited to the inside of the notch.

8. A self-locking beam-column connection method, based on the self-locking beam-column connection node according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Prefabricated assembly: Fix the pressure transmission block and insert plate to the lower side wall of the crossbeam, and fix the end plate, support block and self-locking component to the upper end of the column. S2. Alignment and self-locking: The hoisting beam is lowered vertically so that the insert plate is inserted into the slot of the connector. The insert plate pushes the movable part to rotate until the pressure block and the support block are pressed together. The spring drives the movable part to reset, and the lower end of the movable part is inserted into the strip hole of the insert plate to complete the beam-column self-locking connection. S3. Fastening and reinforcement: Fix the angle steel to both the beam and the end plate simultaneously to complete the beam-column joint connection.

9. The self-locking beam-column connection method according to claim 8, characterized in that, The disassembly process also includes the following steps: screw the operating rod on the self-locking component into the threaded hole of the movable component. The operating rod is threadedly connected to the threaded hole. The operating rod is limited to the inside of the notch opened on the side wall of the first groove. By moving the operating rod through the notch, the movable component is rotated, causing the lower end of the movable component to disengage from the strip hole. The vertically hoisted beam is then disassembled.

Images