Steel structure T-shaped beam column joint and working method thereof

Abstract

The invention belongs to the technical field of fabricated steel structures, and provides a steel structure T-shaped beam-column joint and a working method thereof, the steel structure T-shaped beam-column joint comprises a middle shaft body, a plurality of foundation plate suites arranged on the middle shaft body, and beam-column connecting pieces arranged at the ends, away from the middle shaft body, of the foundation plate suites; an inner gear is arranged on the foundation plate external member, and the inner gear is meshed with a gear; a bolt and damping blocks located on the two sides of the bolt are arranged on the inner hole wall of the gear; a plurality of limiting blocks are arranged on the intermediate shaft body, the gear inner holes of all the foundation plate suites are connected to the intermediate shaft body in a sleeving mode, and the limiting blocks are connected between the two damping blocks of the corresponding gear inner holes in an inserted mode; when the beam column joint is subjected to external force, external rotating force firstly dissipates energy through the limiting blocks and the damping blocks, the energy dissipation capacity and the self-resetting capacity under the action of earthquakes or wind loads are guaranteed, the problem of brittle failure of the beam column joint is solved, the whole beam column joint can be assembled on site, and the requirement for installation precision is not high.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated steel structure technology, and particularly relates to a steel structure T-beam-column joint and its working method. Background Technology

[0002] With the widespread application of prefabricated steel structures, the load-bearing performance and connection methods of beam-column joints have become key issues in structural design. Traditional steel structure beam-column joints mostly adopt rigid connection methods such as welding or bolting. Although these methods can meet the basic requirements of structural bearing capacity, they still have certain shortcomings.

[0003] First, welded joints have strict requirements for the construction environment, making it difficult to guarantee the quality of on-site work. Furthermore, the construction process is complex and time-consuming. Second, under seismic or wind loads, traditional joints have high stiffness and limited energy dissipation capacity, making them prone to brittle failure and weakening the overall seismic performance of the structure. In addition, conventional joints involve a wide variety of structural components, require high installation precision, have poor assemblability, and are not conducive to large-scale industrial production and rapid assembly. Under repeated loading, they are difficult to return to their initial state, exhibiting significant residual deformation and lacking effective self-resetting capabilities, which is detrimental to the long-term use and maintenance of the structure. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a steel structure T-beam-column joint and its working method. When the beam-column joint is subjected to external forces, the external rotational force is first dissipated through the limiting block and damping block, ensuring the energy dissipation capacity and self-resetting capacity under earthquake or wind loads. This solves the problem of brittle failure of the beam-column joint, and the entire beam-column joint can be assembled on-site with low installation precision requirements.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a steel structure T-beam-column joint, employing the following technical solution: A steel structure T-beam-column joint includes an intermediate shaft, a plurality of base plate kits disposed on the intermediate shaft, and a beam-column connector disposed at one end of the base plate kits away from the intermediate shaft. The base plate assembly is equipped with an internal gear that meshes with a gear; the inner wall of the gear is provided with a pin and damping blocks located on both sides of the pin; the intermediate shaft is provided with multiple limiting blocks, and the inner holes of all the base plate assemblies' gears are sleeved on the intermediate shaft, with the limiting blocks inserted between the two damping blocks corresponding to the inner holes of the gears; when the beam-column joint is subjected to external force, the external rotational force is first dissipated through the limiting blocks and damping blocks.

[0006] Furthermore, the beam-column connector is made of rectangular steel, with one end connected to the column and / or beam, and the other end connected to the foundation plate assembly.

[0007] Furthermore, the base plate kit includes a base plate; one end of the base plate has a pre-drilled connection hole; and the middle of the base plate has a pre-drilled hole.

[0008] Furthermore, the beam-column connector is provided with reserved holes that match the foundation plate. The connecting end of the foundation plate is inserted into the beam-column connector and fixed by the reserved connecting holes in the foundation plate and the fixing screws of the connector.

[0009] Furthermore, an internal gear is provided at the other end of the base plate via an internal gear energy dissipation block. The internal gear is meshed with a gear, and a damping block and a pin are provided in the middle hole of the gear.

[0010] Furthermore, one end of the pin is inserted into the gear, and the other end is an arc-shaped mechanism; the damping block has an arc-shaped structure.

[0011] Furthermore, an internal gear energy-consuming block is provided between the internal gear and the base plate.

[0012] Furthermore, each base plate kit has an elastic annular washer on both sides; the elastic annular washer comprises two interlocking irregularly shaped gaskets.

[0013] Furthermore, lubricant is applied to the elastic annular washer.

[0014] To achieve the above objectives, secondly, the present invention also provides a working method for a steel structure T-beam-column joint, employing the following technical solution: A working method for a steel structure T-beam-column joint, using the steel structure T-beam-column joint as described in the first aspect, includes: when the beam-column joint is subjected to external force, the external rotational force is first dissipated through a limiting block and a damping block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention features an internal gear on the base plate assembly, which meshes with a gear. A pin and damping blocks on either side of the pin are located on the inner wall of the gear. Multiple limiting blocks are mounted on the intermediate shaft. The inner holes of all the gears in the base plate assembly are fitted onto the intermediate shaft, and the limiting blocks are inserted between the two damping blocks corresponding to the inner holes of the gears. When the beam-column joint is subjected to external force, the external rotational force is first dissipated through the limiting blocks and damping blocks, ensuring energy dissipation and self-resetting capabilities under earthquake or wind loads. This solves the problem of brittle failure in beam-column joints, and the entire beam-column joint can be assembled on-site with low installation precision requirements.

[0016] 2. The overall structure of this invention is mainly assembled by bolts from a base plate kit, intermediate shaft, limiter, and beam-column connectors, which reduces the types of components and improves the assemblability and convenience of the structure. The nodes of this invention are assembled by bolts from a base plate kit, intermediate shaft, limiter, and connectors, which reduces the types of components, facilitates assembly, and is conducive to factory prefabrication and rapid on-site installation, significantly improving construction efficiency.

[0017] 3. The basic plate kit of this invention has a gear meshing structure, which can be flexibly installed at multiple angles according to actual engineering needs and adapt to different structural layouts.

[0018] 4. In terms of stress performance, this invention can dissipate energy by driving pins and damping blocks through gears when beams and columns are bent. It has a two-stage energy dissipation device, which can effectively achieve vibration reduction and energy dissipation. When subjected to axial force, it can achieve buffer energy dissipation through bolts and washers, effectively improving the vibration reduction and energy dissipation capacity of the node. At the same time, the damping block provides restoring force during compression and tension, which, together with the buffering effect of the elastic ring washer, enables the node to return to its initial position under repeated loads, reducing residual deformation and exhibiting good self-resetting ability.

[0019] 5. The nodes of this invention are designed with a symmetrical distribution, ensuring stability and load-bearing capacity under complex stress conditions and improving the overall seismic performance of the structure. This invention reduces on-site welding procedures, lowers construction energy consumption and environmental impact, and aligns with the development direction of green, low-carbon, and prefabricated steel structures. Attached Figure Description

[0020] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0021] Figure 1 This is a three-dimensional view of the beam-column joint in Embodiment 1 of the present invention; Figure 2 This is a diagram showing the internal structure of the beam-column joint in Embodiment 1 of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the beam-column joint in Embodiment 1 of the present invention; Figure 4 This is a structural diagram of the basic board kit of Embodiment 1 of the present invention; Figure 5 This is a structural diagram of the base plate of Embodiment 1 of the present invention; Figure 6 This is a structural diagram of the elastic annular washer of Embodiment 1 of the present invention; Figure 7 This is a structural diagram of the intermediate shaft of Embodiment 1 of the present invention; Figure 8This is a structural diagram of the limiter according to Embodiment 1 of the present invention; Figure 9 This is a structural diagram of the connector in Embodiment 1 of the present invention; Figure 10 This is a structural diagram of the pin and damping block according to Embodiment 1 of the present invention; The components include: 1. Beam-column connector; 2. Intermediate shaft; 3. Foundation plate kit; 4. Limiting plate; 5. Elastic ring washer; 6. Internal gear; 7. Gear; 8. Damping block; 9. Pin; 10. Pre-drilled connection hole in foundation plate; 11. Limiting screw; 12. Foundation plate; 13. Special-shaped gasket; 14. Limiting block; 15. Limiting hole; 16. Pre-drilled hole for limiting device fixing; 17. Fixing bolt; 18. Connector fixing screw; 19. Pre-drilled bolt hole; 20. Pre-drilled hole in foundation plate; 21. Screw; 22. Energy dissipation plate; 23. Internal gear energy dissipation block. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] Example 1: like Figure 1 As shown, this embodiment provides a steel structure T-beam-column joint, including multiple base plate kits 3 set on the intermediate shaft 2, beam-column connectors 1 set on the base plate kits 3, and limiters 4 and elastic annular washers 5 set on the intermediate shaft 2.

[0025] Optional, such as Figure 4 , Figure 5 and Figure 9 As shown, the beam-column connector 1 is a rectangular steel piece. One end of the beam-column connector 1 is connected to the column and / or beam via bolts or other means, and the other end is connected to the foundation plate assembly 3. Specifically, the beam-column connector 1 has pre-drilled holes that match the foundation plate 12. The connecting end of the foundation plate 12 is inserted into the beam-column connector 1, and then fixed to the foundation plate 12 using connector fixing screws 18 through the pre-drilled connection holes 10, enabling them to work together. The other side of the beam-column connector 1 has pre-drilled bolt holes 19, facilitating connection of the joint to different types of beams (columns).

[0026] like Figure 4 and Figure 5As shown, the base plate kit 3 includes a base plate 12, an internal gear 6, a gear 7, and a pin 9. The base plate and the internal gear 6 are fixedly connected, and the gear and the internal gear 6 mesh. The pin 9 is installed at the keyway of the gear, and damping blocks 8 are installed on both sides of the pin 9. A pre-drilled hole 20 is made in the middle part of the base plate 12 to facilitate the later installation of a limiter 4 for fixing the central shaft.

[0027] Specifically, the base plate kit 3 includes a base plate 12; one end of the base plate 12 has a base plate reserved connection hole 10 for connecting with the beam-column connector 1; the base plate 12 has a base plate reserved hole 20 in the middle; the other end of the base plate 12 is provided with an internal gear 6 through an internal gear energy dissipation block 23, the internal gear 6 is meshed with a gear 7, and a damping block 8 and a pin 9 are provided in the middle hole of the gear 7.

[0028] like Figure 6 As shown, the elastic annular washer 5 is composed of two irregularly shaped washers 13 spliced ​​together. An elastic annular washer 5 is placed every other base plate assembly 3, and lubricant is applied to the elastic annular washer 5. The elastic annular washer 5 can effectively reduce axial impact and reduce friction between base plate assemblies 3.

[0029] Specifically, each base plate 12 of each base plate kit 3 is provided with an elastic annular washer 5 on both sides; the elastic annular washer 5 includes two irregularly shaped gaskets 13 spliced ​​together by interlocking slots and interlocking blocks.

[0030] like Figure 7 As shown, the intermediate shaft 2 is an irregularly shaped component and serves as the core framework of the entire beam-column joint. Seven base plate kits 3 are connected to the intermediate shaft 2. Seven limiting blocks 14 are installed in the middle section of the intermediate shaft 2, each connected to a base plate kit 3 via damping blocks 8 and seven pins 9. Appropriate gaps are provided between the limiting blocks 14 to reduce the overall weight of the structure and ensure the continuity of the joint during assembly. Threads are provided at the ends of the intermediate shaft 2, and the base plate kits 3 are clamped by tightening the fixing nuts 17. The ends of the intermediate shaft 2 are cut into flat openings to facilitate connection with limiters 4, which restrict the rotation of the intermediate shaft 2.

[0031] The limiting block 14, depending on its location (beam / column limiting block), can flexibly adjust its width and thickness according to the magnitude of the force it bears, ensuring that the beam-column stiffness of the entire node remains within a reasonable range. For columns, which bear greater forces, the thickness and width of the limiting block can be increased according to actual engineering needs to enhance the column's stiffness. For the limiting block corresponding to the beam, its width and thickness can be appropriately reduced according to the actual engineering situation, which can save materials and coordinate the stiffness of the node.

[0032] like Figure 8 As shown, the limiter 4 is used to limit the rotation of the intermediate shaft 2. A limit hole 15 is provided on it, and it is connected to the intermediate shaft 2 through the limit hole 15. An opening is made below the limiter 4, and the limiter 4 is fixed by the limiter fixing reserved hole 16 and the limit screw 11.

[0033] In this embodiment, the T-beam-column joint has a gear 7 built into the foundation plate kit 3, allowing it to be installed at any angle according to specific engineering requirements during assembly. The seven foundation plate kits 3 are divided into three groups, which are symmetrically distributed. The first, fourth, and seventh foundation plate kits (counting from left to right) are connected to the lower limiting screw 11 (referred to as the lower column connection kit group), the second and sixth kits are connected to the upper screw (referred to as the upper column connection kit group), and the third and fifth kits are connected to the screw on one side of the beam (referred to as the beam connection kit group). This symmetrical distribution design ensures the stability of the joint under stress.

[0034] An internal gear energy dissipation block 23 is also provided between the internal gear 6 and the base plate 12. When the external rotational force is transmitted through the base plate, it is first dissipated through the internal gear energy dissipation block between the base plate and the internal gear, and it also serves as a limit to prevent the beam (column) from rotating too much and causing damage to the overall structure.

[0035] In this embodiment, the assemblable T-beam-column joint allows the bending moment to be transmitted to the foundation plate assembly 3 via the beam-column connector 1 when the beam (column) is bent. This transmission drives the internal gear 6 and the gear 7 connected to it to rotate within the foundation plate assembly 3. The rotation of gear 7 causes the pin 9 to rotate, thereby compressing the damping block 8. The compression and tension of the damping block 8 act as a secondary energy dissipation mechanism for the entire beam-column joint, achieving both energy dissipation and self-resetting effects.

[0036] The nested meshing of the internal gear 6 and gear 7 forms the core transmission mechanism of the node. Its core effect lies in achieving a transformation of motion and improving energy efficiency: it converts the macroscopic reciprocating oscillation generated when the beam-column is bent into the precise unidirectional continuous rotation of gear 7, thereby driving pin 9 to efficiently and continuously perform work on damping block 8. This design not only amplifies the torque acting on the damping block using the lever principle of the gear pair, achieving the effect of "small deformation, large energy consumption," but also ensures that after the external force is unloaded, the system can accurately return to its initial position through gear transmission using the restoring force of the damping block, thus simultaneously achieving the dual functions of efficient energy consumption throughout the entire cycle and reliable self-reset.

[0037] The aforementioned assemblable T-beam-column joint, with its intermediate shaft 2 connected by a screw 21, enhances the overall rigidity and integrity of the joint. Secondly, the integrated screw allows the connecting components within each assembly to work collaboratively. When force is transmitted to any connecting component through the connector, the gears and limiting blocks of the entire assembly can function under the action of the integrated screw. This improves the structural utilization efficiency while allowing for a reduction in the size of the limiting blocks based on actual conditions, thus saving materials.

[0038] The aforementioned assemblable T-beam-column joint, when the beam (column) is subjected to axial force, buffers and dissipates energy on the one hand through the screw at the connection between the beam-column connector 1 and the foundation plate kit 3, and further dissipates force through the energy-dissipating plate arranged on the foundation plate kit, thus ensuring the stability of the joint.

[0039] In summary, the prefabricated T-beam-column joint in this embodiment is mainly assembled from a base plate kit 3, an intermediate shaft 2, a limiter 4, and a beam-column connector 1 using bolts. This reduces the types of components and improves the prefabrication and convenience of the structure. It effectively overcomes the shortcomings of existing technologies and has the following beneficial effects: First, the joint is assembled from a base plate kit, an intermediate shaft, a limiter, and connectors using bolts, reducing the types of components, facilitating assembly, and promoting factory prefabrication and rapid on-site installation, significantly improving construction efficiency. Second, the base plate kit has a gear meshing structure, allowing for flexible installation at multiple angles according to actual engineering needs, adapting to different structural layouts. Regarding load-bearing performance, when the beam and column are subjected to bending, the joint dissipates energy through the gear driving the pin and damping block, with a two-stage energy dissipation setting, effectively achieving vibration reduction and energy dissipation. When subjected to axial force, it uses bolts and washers to buffer energy dissipation, effectively improving the joint's vibration reduction and energy dissipation capabilities. Meanwhile, the damping block provides restoring force during compression and tension, and together with the buffering effect of the elastic annular washer, the node can return to its initial position under repeated loading, reducing residual deformation and demonstrating good self-resetting ability. Furthermore, the node adopts a symmetrical distribution design to ensure stability and load-bearing capacity under complex stress states, improving the overall seismic performance of the structure. Finally, this invention reduces on-site welding procedures, lowers construction energy consumption and environmental impact, and aligns with the development direction of green, low-carbon, and prefabricated steel structures.

[0040] Example 2: This embodiment provides a working method for a steel structure T-beam-column joint, which uses the steel structure T-beam-column joint as described in Embodiment 1, including: when the beam-column joint is subjected to external force, the external rotational force is first dissipated through the limiting block and the damping block.

[0041] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A steel structure T-beam-column joint, characterized in that, It includes an intermediate shaft, multiple base plate kits disposed on the intermediate shaft, and a beam-column connector disposed at one end of the base plate kits away from the intermediate shaft; The base plate assembly is equipped with an internal gear that meshes with a gear; the inner wall of the gear is provided with a pin and damping blocks located on both sides of the pin; the intermediate shaft is provided with multiple limiting blocks, and the inner holes of all the base plate assemblies' gears are sleeved on the intermediate shaft, with the limiting blocks inserted between the two damping blocks corresponding to the inner holes of the gears; when the beam-column joint is subjected to external force, the external rotational force is first dissipated through the limiting blocks and damping blocks.

2. A steel structure T-beam-column joint as described in claim 1, characterized in that, The beam-column connector is made of rectangular steel, with one end connected to the column and / or beam and the other end connected to the foundation plate assembly.

3. A steel structure T-beam-column joint as described in claim 1, characterized in that, The base plate kit includes a base plate; one end of the base plate has a pre-drilled connection hole; and the middle of the base plate has a pre-drilled connection hole.

4. A steel structure T-beam-column joint as described in claim 3, characterized in that, The beam-column connector is provided with reserved holes that match the foundation plate. The connecting end of the foundation plate is inserted into the beam-column connector and fixed by the reserved connecting holes in the foundation plate and the fixing screws of the connector.

5. A steel structure T-beam-column joint as described in claim 3, characterized in that, The other end of the base plate is provided with an internal gear through an internal gear energy dissipation block. The internal gear is meshed with a gear, and a damping block and a pin are provided in the middle hole of the gear.

6. A steel structure T-beam-column joint as described in claim 5, characterized in that, One end of the pin is inserted into the gear, and the other end is an arc-shaped mechanism; the damping block has an arc-shaped structure.

7. A steel structure T-beam-column joint as described in claim 5, characterized in that, An energy-consuming block for the internal gear is installed between the internal gear and the base plate.

8. A steel structure T-beam-column joint as described in claim 1, characterized in that, Each base plate kit has an elastic annular washer on both sides; the elastic annular washer consists of two interlocking irregularly shaped gaskets.

9. A steel structure T-beam-column joint as described in claim 8, characterized in that, Lubricant is applied to the elastic annular washer.

10. A working method for a steel structure T-beam-column joint, characterized in that, The steel structure T-beam-column joint as described in any one of claims 1-9 is used, including: when the beam-column joint is subjected to external force, the external rotational force is first dissipated through the limiting block and the damping block.

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