Beam-column joint structure of fabricated steel structure and fabricated building frame

Abstract

The utility model discloses an assembly type steel structure beam column node structure and assembly type building framework, including stand column, crossbeam and node connecting piece, each side face of stand column is equipped with the mortise hole, each mortise hole is communicated with the inner cavity of stand column, the connecting end part of crossbeam is mutually mortise and tenon joint with stand column at the mortise hole, and the node connecting piece is equipped with the node connecting piece. The node connecting piece is vertically inserted into the inner cavity of the stand column and limits and fixes the cross beam extending to the inner cavity of the stand column in the axial direction. Welding or bolt connection is not needed in the whole process, the beam column is not damaged when dismantled and can be turned over for multiple times, the assembling process is greatly simplified, the construction efficiency is greatly improved, meanwhile, the structural stability is enhanced, and the assembling cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated steel structures, and in particular to a beam-column joint structure and a prefabricated building frame for prefabricated steel structures. Background Technology

[0002] Currently, in the construction industry, building structural forms are gradually developing. With the increasing space utilization and building height, and the country's increasing requirements for project assembly rates, structural forms are increasingly developing towards prefabrication and modularization. Composite structures have both high assembly rates and excellent mechanical properties, resulting in their increasing frequency of use in existing projects.

[0003] Currently, in steel structure building systems, beam-column connections are crucial for ensuring structural stability and load-bearing capacity. Traditionally, steel structure beam-column connections primarily employ welding and bolting. However, both methods present a series of unresolved problems in practical engineering applications. Bolting connections, in particular, require high precision. During processing, they are affected by factors such as the precision of the processing equipment, the skill level of the operators, and the processing environment. During construction, the installation precision of the components also influences bolt hole positions, leading to deviations. Insufficient hole precision necessitates enlarging or re-drilling holes on-site, increasing construction costs and management complexity. Welding connections also present uncontrollable challenges. On-site welding operations are easily affected by complex environmental factors, such as wind, humidity, and temperature variations, all of which negatively impact weld quality. Furthermore, many beam-column connections require overhead welding. Because the weld seam is located below the workpiece, welders must operate in an upward-looking posture, significantly increasing operational difficulty. Additionally, the molten droplets are prone to dripping due to gravity, resulting in poor weld quality and defects such as incomplete penetration, slag inclusions, and porosity. In addition, the quality of the weld is difficult to inspect on site.

[0004] With the increasing use of steel structure building systems in construction, reliable connections are a prerequisite for excellent mechanical performance. More and more composite structural forms are being applied in practical projects. However, most steel structure building systems are difficult to construct, with complex connections and high construction difficulty. Therefore, node types that ensure reliable connections between beams and columns while saving construction resources have become the goal of current research. Utility Model Content

[0005] In view of the shortcomings of the existing technology, one of the objectives of this utility model is to provide a beam-column joint structure for prefabricated steel structures to solve the problems of traditional steel structure beam-column connections using welding and bolts.

[0006] One of the objectives of this utility model is achieved through the following technical solution:

[0007] A prefabricated steel structure beam-column joint structure includes columns, beams, and joint connectors. Each side of the column is provided with mortises, and each mortise is connected to the inner cavity of the column. The connecting end of the beam is tenon-and-mortise connected to the column at the mortise. The joint connector is vertically inserted into the inner cavity of the column and limits and fixes the beam extending into the inner cavity of the column in the axial direction.

[0008] Furthermore, the node connector is in the shape of a hollow column and each side of it is provided with a node limiting groove extending in the axial direction. The opening end of each node limiting groove is set downward, and the node limiting groove is connected to the mortise hole one by one.

[0009] Furthermore, the depth of the node limiting groove is greater than the width of the crossbeam.

[0010] Furthermore, the cross-section of the node limiting groove is an inverted U-shape.

[0011] Furthermore, the connection end between the node limiting groove and the crossbeam is a clearance fit.

[0012] Furthermore, the column includes an upper column and a lower column that are coaxially arranged and spliced ​​together, and the upper column and the lower column have a plurality of mortises at the splicing position.

[0013] Furthermore, the lower column has multiple overlapping grooves on its top sides, and the upper column has snap-fit ​​grooves at the bottom corresponding to the overlapping grooves. The bottom surface of the connecting end of the crossbeam extends vertically upward to form a tenon. The connecting end of the crossbeam overlaps in the overlapping groove, and the tenon and the bottom surface of the overlapping groove are tenoned together. The top surface of the connecting end of the crossbeam is held by the snap-fit ​​groove.

[0014] Furthermore, the depth of the lap groove is greater than the depth of the tenon groove.

[0015] The second objective of this utility model is to provide a prefabricated building frame to solve the problems of difficult construction, complex connections, and high construction difficulty in steel structure building systems.

[0016] The second objective of this utility model is achieved by the following technical solution:

[0017] A prefabricated building frame includes the beam-column joint structure of the prefabricated steel structure described above.

[0018] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0019] This utility model employs mortise and tenon joints and node connectors to connect beams and columns, achieving not only rapid assembly and disassembly but also eliminating the need for welding or bolts throughout the process. Beams and columns are removed without damage, allowing for multiple reuses, greatly simplifying the assembly process, significantly improving construction efficiency, enhancing structural stability, and reducing assembly costs. Furthermore, the node connectors are concealed within the columns, achieving concealed installation while preserving the aesthetics of the mortise and tenon joints and providing a high-strength functional connection. Simultaneously, the node connectors allow for a certain degree of slip deformation between beams and columns. Under dynamic loads or seismic action, the loosening and gaps at the nodes can amplify the deformation capacity, increasing the structural damping coefficient and thus reducing the response of the superstructure. This truly achieves energy dissipation through node deformation, ensuring structural stability under dynamic impact. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection between the column and the beam in Embodiment 1 of this utility model;

[0021] Figure 2 yes Figure 1 Exploded view of the structure;

[0022] Figure 3 yes Figure 1 One of the sectional views of the structure;

[0023] Figure 4 yes Figure 1 The second sectional view of the structure;

[0024] Figure 5 This is a schematic diagram of the node connector of Embodiment 1 of this utility model;

[0025] Figure 6 This is a schematic diagram of the upper column of Embodiment 1 of this utility model;

[0026] Figure 7 This is a schematic diagram of the lower column of Embodiment 1 of this utility model;

[0027] Figure 8 This is a schematic diagram of the prefabricated building frame of Embodiment 2 of this utility model;

[0028] In the diagram: 10, column; 11, upper column; 111, snap-fit ​​groove; 12, lower column; 121, lap groove; 20, crossbeam; 201, tenon; 30, node connector; 31, node limiting groove. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0030] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0031] Example 1

[0032] like Figures 1 to 7 As shown, this utility model provides a beam-column joint structure for a prefabricated steel structure, including a column 10, a beam 20, and a joint connector 30. Each side of the column 10 is provided with a mortise hole, and each mortise hole is connected to the inner cavity of the column 10. The connecting end of the beam 20 is mortised and tenoned with the column 10 at the mortise hole. The joint connector 30 is vertically inserted into the inner cavity of the column 10 and limits and fixes the beam 20 extending into the inner cavity of the column 10 in the axial direction.

[0033] In this embodiment, the beam 20 and the column 10 are first connected at the mortise using a tenon and mortise method. The tenon and mortise connection can provide self-locking force in multiple directions, which can effectively resist horizontal and vertical loads. Then, the beam 20 and the column 10 are reinforced and connected at the node connection using a node connector 30. By using the node connector 30 to limit and fix multiple beams 20 in the axial direction, the stability of the beam-column connection can be further enhanced, preventing displacement or deformation caused by external forces.

[0034] This utility model employs mortise and tenon joints and node connectors 30 for the connection between beams and columns. This not only achieves quick assembly and disassembly but also eliminates the need for welding or bolts throughout the process. Beams and columns are removed without damage and can be reused multiple times, greatly simplifying the assembly process, significantly improving construction efficiency, enhancing structural stability, and reducing assembly costs. Furthermore, the node connectors 30 are concealed within the columns 10, achieving concealed installation while preserving the aesthetics of the mortise and tenon joints and providing a high-strength functional connection. Simultaneously, the node connectors 30 allow for a certain degree of slip deformation between beams and columns. Under dynamic loads or seismic action, the loosening and gaps in the nodes can amplify the deformation capacity, increasing the structural damping coefficient and thus reducing the response of the superstructure. This truly achieves energy dissipation through node deformation, ensuring structural stability under dynamic impact.

[0035] It is understandable that the column 10, beam 20 and node connector 30 can be produced in a standardized manner, that is, they can be prefabricated in the factory to achieve mass production of components, which helps to reduce production costs and allows for direct replacement during maintenance.

[0036] In a preferred embodiment, the node connector 30 is a hollow column with node limiting grooves 31 extending in the axial direction on each side. The opening end of each node limiting groove 31 is downward and the node limiting groove 31 is connected to the mortise hole one by one.

[0037] In this embodiment, the node connector 30 is inserted and fixed to the connection end of the crossbeam 20 through the node limiting groove 31, thereby limiting and fixing the crossbeam 20 in the axial direction and ensuring the stability of the beam-column node connection. In addition, the node connector 30 adopts an insert assembly, which does not require welding, is highly operable, and is convenient and quick to install.

[0038] In a preferred embodiment, the depth of the node limiting groove 31 is greater than the width of the crossbeam 20. This ensures that the crossbeam 20 is completely engaged within the node limiting groove 31, further enhancing the connection performance of the node area.

[0039] In a preferred embodiment, the cross-section of the node limiting groove 31 is an inverted U-shape. Of course, in other embodiments, the cross-sectional shape of the node limiting groove 31 can also be other shapes, such as an inverted U-shape, a circle, etc.

[0040] In a preferred embodiment, the connection end between the node limiting groove 31 and the crossbeam 20 is a clearance fit. This allows for a certain degree of slip deformation capacity at the beam-column joint. Under dynamic loads or seismic action, the loosening and clearance of the joint can amplify the deformation capacity, increase the structural damping coefficient, thereby reducing the response of the superstructure, truly realizing node deformation energy dissipation, and ensuring structural stability under dynamic impact.

[0041] In a preferred embodiment, the column 10 includes an upper column 11 and a lower column 12 that are coaxially arranged and spliced ​​together, and the upper column 11 and the lower column 12 have a plurality of mortises at the splicing position.

[0042] In this embodiment, the column 10 adopts a split splicing structure, which can realize segmented prefabrication and on-site assembly, reducing on-site construction errors. The split splicing facilitates later heightening or expansion. At the same time, by setting energy dissipation nodes between segments, seismic energy can be absorbed, improving structural ductility.

[0043] In a preferred embodiment, the lower column 12 has multiple overlapping grooves 121 on its top side, and the upper column 11 has locking grooves 111 at the bottom corresponding to the overlapping grooves 121. The bottom surface of the connecting end of the crossbeam 20 extends vertically upward to form a tenon 201. The connecting end of the crossbeam 20 is placed in the overlapping groove 121 and the tenon 201 is tenoned to the bottom surface of the overlapping groove 121. The top surface of the connecting end of the crossbeam 20 is held by the locking groove 111.

[0044] In this embodiment, the connecting end of the crossbeam 20 is locked in the axial direction of the column 10 by the cooperation of the overlapping groove 121 and the snap-fit ​​groove 111. At the same time, the tenon 201 and the bottom surface of the overlapping groove 121 are tenoned to each other, which improves the connection performance between the beam and the column, ensures the stability and reliability of the mortise and tenon connection between the beam and the column, and strengthens the seismic and bending resistance.

[0045] It is understandable that the depth and form of the overlapping groove 121 and the snap-fit ​​groove 111 are variable, and the cross-sectional size and form of the crossbeam 20 are variable.

[0046] In a preferred embodiment, the depth of the overlapping groove 121 is greater than the depth of the tenon 201. This increases the contact area between the beam 20 and the overlapping groove 121, improving connection stability and load-bearing capacity.

[0047] Example 2

[0048] like Figure 8 This utility model also provides a prefabricated building frame, including the beam-column joint structure of the prefabricated steel structure described above.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A beam-column joint structure for prefabricated steel structures, characterized in that, The device includes a column (10), a crossbeam (20), and a node connector (30). Each side of the column (10) is provided with a mortise hole, and each mortise hole is connected to the inner cavity of the column (10). The connecting end of the crossbeam (20) is mortised and tenoned with the column (10) at the mortise hole. The node connector (30) is vertically inserted into the inner cavity of the column (10) and limits and fixes the crossbeam (20) extending into the inner cavity of the column (10) in the axial direction.

2. The fabricated steel structure beam column joint structure according to claim 1, characterized by, The node connector (30) is a hollow column with node limiting grooves (31) extending in the axial direction on each side. The opening end of each node limiting groove (31) is set downward, and the node limiting groove (31) is connected to the mortise hole one by one.

3. The fabricated steel structure beam column joint structure according to claim 2, characterized by, The depth of the node limiting groove (31) is greater than the width of the crossbeam (20).

4. The fabricated steel structure beam column joint structure according to claim 2, characterized by, The cross-section of the node limiting groove (31) is an inverted U-shape.

5. The fabricated steel structure beam column joint structure according to claim 2, wherein, The connection end between the node limiting groove (31) and the crossbeam (20) is a clearance fit.

6. The fabricated steel structure beam column joint structure according to claim 1, wherein, The column (10) includes an upper column (11) and a lower column (12) that are coaxially arranged and spliced ​​together, and the upper column (11) and the lower column (12) have a plurality of mortises at the splicing position.

7. The fabricated steel structure beam column joint structure according to claim 6, characterized by, The lower column (12) has multiple overlapping grooves (121) on its top side. The upper column (11) has locking grooves (111) at the bottom corresponding to the overlapping grooves (121). The bottom surface of the connecting end of the crossbeam (20) extends vertically upward to form a tenon (201). The connecting end of the crossbeam (20) is placed in the overlapping groove (121) and the tenon (201) is tenoned to the bottom surface of the overlapping groove (121). The top surface of the connecting end of the crossbeam (20) is held by the locking groove (111).

8. The fabricated steel structure beam column joint structure according to claim 7, characterized by, The depth of the lap groove (121) is greater than the depth of the tenon (201).

9. A fabricated building frame, characterised in that, The beam-column joint structure of the prefabricated steel structure as described in any one of claims 1-8.

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