Mortise and tenon joint H-shaped steel joint of fabricated large-span steel structure

Abstract

The invention relates to the field of large-span space steel structures, and discloses an assembly type large-span steel structure mortise and tenon lap joint H-shaped steel node which comprises a welding hollow ball and a plurality of connecting assemblies, and each connecting assembly is composed of a mortise groove connecting section, a tenon lap joint section and an H-shaped steel chord member. A mortise and tenon connection mechanism is applied to the steel structure joint, the metal mortise is formed through the mortise connection section, the matched tenon is arranged at the end of the tenon lap joint section, and the tenon is embedded into the mortise to achieve self-positioning during field assembly and then locked through the high-strength bolt. All welding procedures of the joint are completed in a factory, welding operation is avoided on site, construction efficiency is remarkably improved, and quality is guaranteed. The H-shaped steel chord member is adopted to replace a closed-section rod piece, so that upper purline lap joint and bolt operation are facilitated. And the tenon-and-mortise contact surface is specially treated to ensure smooth sliding-in, so that green and quick assembly of the large-span steel structure is realized.

Description

Technical Field

[0001] The invention relates to the field of large-span spatial steel structures, in particular to an assembled large-span steel structure mortise and tenon overlap H-shaped steel node. Background Art

[0002] my country's construction industry is currently undergoing a transformation towards green, industrialized, and information-based development. The development of steel structure systems that can be rapidly assembled on-site is a core industry need. However, existing prefabricated steel structure technologies are primarily focused on multi-story buildings, and efficient assembly solutions for large-span spatial steel structures are lacking. Traditional large-span joints often utilize on-site welded hollow sphere connections, which have three major drawbacks: first, the spatial positioning accuracy of the members is difficult to control; second, the on-site welding process requires stringent requirements, resulting in insufficient quality consistency; and third, the welding process is polluting and inefficient.

[0003] In response to the above problems, there is an urgent need to develop a prefabricated node suitable for large-span spatial steel structures to achieve factory prefabrication and on-site rapid assembly without welding, while ensuring structural reliability and environmentally friendly construction.

[0004] In addition, existing closed-section rods (such as round tubes and square tubes) have operational difficulties in welding and purlin overlap, and structural innovation is needed to optimize construction convenience. Summary of the Invention

[0005] The present invention aims to solve the problems of uncontrollable on-site welding quality of large-span steel structures, low construction efficiency and inconvenient connection of closed-section rods.

[0006] In order to solve the above technical problems, the technical solution proposed in this application is: An assembled large-span steel structure mortise and tenon overlap H-shaped steel node, comprising: Welding hollow balls; Several connecting components are fixed on the surface of the welded hollow sphere; Each connection assembly includes a mortise and tenon lap section: A mortise is formed at the tail end of the mortise-groove overlapping section; The front end of the tenon overlap section is provided with a tenon that cooperates with the mortise groove; The tenon is embedded in the mortise and tenon groove to form a mortise and tenon connection of the steel structure.

[0007] Furthermore, the mortise overlapping section and the tenon overlapping section are fixedly connected by high-strength bolts.

[0008] Furthermore, the mortise-groove overlapping section includes a mortise-groove connecting section and an overlapping plate. Two mortise-groove connecting sections of the same shape and size are joined and fixed on the overlapping plate, forming the mortise in the middle.

[0009] Furthermore, the mortise of the mortise groove is serrated, and the tenon teeth of the tenon are also serrated, and the serrated tenon teeth are embedded in the serrated mortise, forming a multi-tooth interlocking steel structure mortise and tenon connection.

[0010] Furthermore, a single serration of the mortise is trapezoidal or rectangular; a single tenon of the tenon is also trapezoidal or rectangular; The saw teeth are matched with the tenon teeth.

[0011] Furthermore, the mortise size of the mortise is 0.5-1.0 mm larger than the tenon tooth size of the tenon, and the contact surface between the tenon and the mortise is surface treated by a process including sandblasting, grinding, polishing or applying a lubricant, so that the tenon can slide smoothly into the mortise.

[0012] Furthermore, the mortise and groove connecting section and the overlapping plate are arranged up and down, and both front ends are provided with arc-shaped portions, and the arc-shaped portions of the two are jointly fixed to the welded hollow ball.

[0013] Furthermore, bolt holes are provided on the flange and end plate of the mortise and groove connection section, and on the flange and end plate of the tenon overlap section, and high-strength bolts pass through the flange bolt holes and / or the end plate bolt holes.

[0014] Furthermore, an H-shaped steel chord is fixed to the tail end of the tenon overlap section. The H-shaped steel chord is an open-section member used to overlap the upper purlins of the large-span spatial steel structure.

[0015] Furthermore, bolt holes are provided on the lap plates, and high-strength bolts penetrate the bolt holes to fix the tenon lap sections and the lap plates.

[0016] Compared with the prior art, the present invention has achieved the following beneficial technical effects: The present invention combines the traditional mortise and tenon structure with the modern large-span spatial steel structure, and has the characteristics of simple structure, convenient connection, and clear force transmission. In addition, the processing and manufacturing of various parts of the node, the welding of the mortise and groove overlap section and the welded hollow ball, and the welding of the tenon connection section and the H-shaped steel chord are all completed in the factory. On site, it is only necessary to embed the tenon into the mortise and then tighten the high-strength bolts at each bolt hole to complete the reliable connection of the various parts of the node, thereby realizing the development goals of green, industrialized and assembled large-span spatial steel structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1The figure is a schematic diagram of the overall structure of an assembled large-span steel structure mortise and tenon overlap H-shaped steel node according to the present invention.

[0019] Figure 2 Schematic diagram of the structure of the connection assembly of the present invention.

[0020] Figure 3 This is a schematic diagram of the overall structure after the welding of the hollow ball and the mortise and groove overlap section is completed.

[0021] Figure 4 This is a schematic diagram of the overall structure after the tenon overlap section and the H-shaped steel chord are welded.

[0022] Figure 5 It is a structural schematic diagram of the mortise and groove overlapping section of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the lap plate of the present invention.

[0024] Figure 7 It is a structural schematic diagram of the mortise and groove connecting section of the present invention.

[0025] Figure 8 It is a structural schematic diagram of the tenon overlap section of the present invention. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] like Figure 1-8 As shown, the present invention relates to an assembled, long-span, mortise-and-tenon lap joint for steel structures. The joint comprises a welded hollow sphere 1 and several connection assemblies 2 fixed to the surface of the welded hollow sphere 1. Each connection assembly 2 includes a mortise-and-tenon lap section 3 and a tenon-and-tenon lap section 6. The mortise-and-tenon lap section 3 has a mortise formed at its rear end, and the tenon-and-tenon lap section 6 has a tenon that fits within the mortise. The tenon fits within the mortise, forming a mortise-and-tenon joint for the steel structure. This structural design enables the joint to effectively transfer loads, improving the overall stability and reliability of the steel structure.

[0028] The mortise overlap section 3 and the tenon overlap section 6 are further fixedly connected by high-strength bolts 8. The use of high-strength bolts 8 further enhances the connection strength and rigidity of the node, ensuring the safety of the node when bearing loads.

[0029] The mortise-and-slot overlapping section 3 comprises a mortise-and-slot connecting section 5 and an overlapping plate 4. Two mortise-and-slot connecting sections 5 of identical shape and size are joined and fixed to the overlapping plate 4, forming the mortise in the middle. This design facilitates the processing and manufacturing of the mortise and also makes the fit between the mortise and the tenon more precise.

[0030] The serrated mortise of the mortise and tenon are also serrated. The serrated tenon teeth fit into the serrated mortise, forming a multi-tooth interlocking steel mortise and tenon joint. This multi-tooth interlocking structural design can effectively improve the joint's shear resistance and seismic performance.

[0031] The serrations of the mortise are trapezoidal or rectangular, and the tenon teeth are also trapezoidal or rectangular, with the serrations matching the tenon teeth. This matching shape design allows the tenon to fit more tightly into the mortise, improving the connection accuracy and stability of the joint.

[0032] The mortise opening is 0.5-1.0mm larger than the tenon tooth, and the contact surface between the tenon and the mortise undergoes a surface treatment process, including sandblasting, grinding, polishing, or applying lubricant, to ensure that the tenon slides smoothly into the mortise. This dimensional design and surface treatment process ensures the appropriate fit between the tenon and the mortise, facilitating assembly and disassembly of the joint.

[0033] The mortise and groove connecting section 5 and the lap plate 4 are arranged vertically, and both have an arc portion at the front end, and the arc portions of the two are fixed to the welded hollow ball 1. This structural design allows the connection component 2 to be more firmly fixed to the welded hollow ball 1, improving the overall performance of the node.

[0034] Bolt holes are provided on the flanges and end plates of the mortise-and-slot connection section 5 and the flanges and end plates of the tenon-and-tenon overlap section 6. High-strength bolts 8 penetrate the flange bolt holes and / or end plate bolt holes. This bolt connection method makes the connection between the mortise-and-slot connection section 5 and the tenon-and-tenon overlap section 6 more secure and effectively transfers load.

[0035] An H-shaped steel chord 7 is welded and fixed to one end of the tenon overlap section 6. The H-shaped steel chord 7 is an open-section member used to overlap the upper purlins of the large-span spatial steel structure. This structural design enables the node to be effectively connected to other components of the large-span spatial steel structure to form a complete structural system. The node chord of the present invention adopts an H-shaped steel open-section member, which is easier to weld and bolt than the closed-section members such as round steel pipes, square steel pipes, and rectangular steel pipes commonly used in actual engineering. It is also more convenient for overlapping the upper purlins of the large-span spatial steel structure.

[0036] Bolt holes are provided on the lap plate 4, and high-strength bolts 8 pass through the bolt holes to fix the tenon lap section 6 to the lap plate 4. This bolt connection method makes the connection between the tenon lap section 6 and the lap plate 4 more reliable, can effectively transfer load, and improve the overall performance of the node.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An assembled large-span steel structure mortise and tenon joint H-shaped steel node, characterized in that: include: Welding hollow sphere (1); A plurality of connection components (2) are fixed on the surface of the welded hollow sphere (1); Each connecting assembly (2) comprises a mortise-groove overlap section (3) and a tenon-joint overlap section (6): A mortise is formed at the tail end of the mortise overlap section (3); The front end of the tenon overlap section (6) is provided with a tenon that cooperates with the mortise groove; The tenon is embedded in the mortise and tenon groove to form a mortise and tenon connection of the steel structure.

2. The node according to claim 1, wherein: The mortise overlap section (3) and the tenon overlap section (6) are also fixedly connected via high-strength bolts (8).

3. The node according to claim 1, wherein: The mortise-groove overlapping section (3) comprises a mortise-groove connecting section (5) and an overlapping plate (4); two mortise-groove connecting sections (5) of the same shape and size are joined and fixed on the overlapping plate (4), forming the mortise in the middle.

4. The node according to claim 1, wherein: The mortise opening of the mortise groove is serrated, and the tenon teeth of the tenon are also serrated. The serrated tenon teeth are embedded in the serrated mortise opening to form a multi-tooth interlocking steel structure mortise and tenon connection.

5. The node according to claim 4, characterized in that: The single serration of the mortise is trapezoidal or rectangular; the single tenon of the tenon is also trapezoidal or rectangular; The saw teeth are matched with the tenon teeth.

6. The node according to claim 5, characterized in that: The mortise opening size of the mortise is 0.5-1.0 mm larger than the tenon tooth size of the tenon, and the contact surface between the tenon and the mortise is surface treated by a process including sandblasting, grinding, polishing or applying a lubricant, so that the tenon can slide smoothly into the mortise.

7. The node according to claim 3, characterized in that: The mortise and groove connecting section (5) and the lap plate (4) are arranged up and down, and both front ends are provided with an arc portion, and the arc portions of the two are jointly fixed to the welded hollow ball (1).

8. The node according to claim 2, wherein: Bolt holes are provided on the flange and end plate of the mortise and groove connection section (5) and the flange and end plate of the tenon overlap section (6), and high-strength bolts (8) pass through the flange bolt holes and / or the end plate bolt holes.

9. The node according to claim 1, wherein: An H-shaped steel chord (7) is fixed to the tail end of the tenon overlap section (6), and the H-shaped steel chord (7) is an open-section rod used for overlapping the upper purlins of a large-span spatial steel structure.

10. The node according to claim 7, characterized in that: Bolt holes are provided on the lap plate (4), and high-strength bolts (8) are passed through the bolt holes to fix the tenon lap section (6) and the lap plate (4).

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