Modular steel structure connection joint

Abstract

The utility model discloses a modularization steel structure connecting joint, including module unit beam column, steel connecting piece and locking piece, module unit beam column includes the steel column and channel steel of hollow state, the cross section shape of steel column is rectangle, and the corresponding lateral wall of channel steel is welded in steel column, and a plurality of first screw holes are seted up on channel steel, steel connecting piece includes apron and L type steel, and a plurality of L type steel are arranged respectively in the center of both sides of apron, and L type steel can be inserted in the corresponding steel column and is combined with the inner wall of steel column, and the second screw hole that is adapted with first screw hole is seted up on apron, locking piece can pass through second screw hole and first screw hole to fix channel steel and apron, the utility model avoids the problem that the brittle overall damage of the connection between the existing module is easy to occur, reduces the influence to the structure overall safety, stability, durability, and solves the problem that the current eight module node is difficult to install in the last stage of construction because of the compactness of seven module installation.

Description

Technical Field

[0001] This utility model relates to the field of modular building construction technology, and in particular to a modular steel structure connection node. Background Technology

[0002] Modular steel structures, due to their high construction efficiency, excellent quality, and environmental friendliness, have gradually become a focus of attention in engineering and academic fields. Their main characteristics are: all interior finishing work on the modular units is completed in the factory, and on the construction site, the modules are simply connected for rapid deployment. This type of building structure represents a key development direction in the industrialization of construction in recent years.

[0003] In the design of modular steel structure buildings, the connection nodes between modules are a critical element. The reliability of these nodes directly affects the overall performance of the structure. Nodes should be rationally constructed, convenient for construction, and compatible with the internal decoration and functional use of the modules. The mechanical properties of the nodes are extremely important for the overall safety of the module; once a problem occurs in the node connection, the structure's function cannot be achieved. Therefore, node design is crucial. However, existing inter-module connections are mostly welded, which are prone to brittle failure, significantly impacting the overall safety, stability, and durability of the structure. Furthermore, current eight-module nodes are difficult to install in the final stages of construction due to the tight installation of seven modules. In addition, the excessive openings in beams and columns in existing nodes can easily damage the materials. Utility Model Content

[0004] The technical problem this utility model aims to solve is that: the existing connection between modules is mostly welded, which is prone to brittle overall failure and has a significant impact on the overall safety, stability and durability of the structure. Furthermore, the current eight-module node is difficult to install in the final stage of construction due to the tight installation of seven modules. In addition, the existing nodes have too many holes in the beams and columns, which can easily damage the materials.

[0005] To address the aforementioned technical problems, this utility model provides a modular steel structure connection node, comprising:

[0006] The modular unit beam-column includes a hollow steel column and a channel steel. The steel column has a rectangular cross-sectional shape, and the channel steel is welded to the corresponding side wall of the steel column. The channel steel has multiple first screw holes.

[0007] A steel connector includes a cover plate and L-shaped steel bars. Multiple L-shaped steel bars are respectively disposed at the center of both sides of the cover plate. The L-shaped steel bars can be inserted into the corresponding steel column and fit against the inner wall of the steel column. The cover plate is provided with a second screw hole that matches the first screw hole.

[0008] A locking element that passes through the second screw hole and the first screw hole to secure the channel steel and the cover plate.

[0009] Furthermore, the channel steel is welded to the top of the two adjacent side walls of the steel column, and the first screw hole is opened on the flange of the channel steel on the side near the top of the steel column.

[0010] Furthermore, the cover plate includes a central portion and a plurality of extended portions integrally formed with the central portion. The plurality of extended portions are spaced apart around the axis of the central portion, and the second screw hole is formed on the flange of the extended portion.

[0011] Furthermore, the width of the channel steel is half the width of the extension portion.

[0012] Furthermore, the cover plate is cross-shaped, T-shaped, or L-shaped.

[0013] Furthermore, the L-shaped steel is disposed in the central part, and the number of L-shaped steel located on one side of the central part is N, where N≥1;

[0014] When N≥2, the multiple L-shaped steels are spaced apart around the axis of the central part.

[0015] Furthermore, the distance between the two oppositely arranged inner walls of the steel column is greater than or equal to the length of the L-shaped steel.

[0016] Furthermore, when N≥2, the distance between two adjacent L-shaped steel sections is not less than twice the wall thickness of the steel column.

[0017] Furthermore, the L-shaped steels located on both sides of the central portion are arranged symmetrically with respect to the central portion.

[0018] Furthermore, the number of channel steels is n1, the number of first screw holes on the channel steels is n2, and the number of second screw holes is n3, satisfying the following formula: n3 = n1 * n2.

[0019] Compared with the prior art, the modular steel structure connection node of this utility model has the following advantages:

[0020] This embodiment of the invention uses a cover plate as a connector, with a first screw hole pre-set on the channel steel and a second screw hole pre-set on the cover plate. The connection is achieved using a locking device instead of traditional welding, reducing the need for direct drilling into beams and columns. This avoids damage to the material caused by excessive drilling, reduces the possibility of brittle failure of beams and columns, and improves the reliability and durability of the joint. Furthermore, since each component is pre-manufactured and has pre-set first or second screw holes, on-site construction only requires aligning the components and fixing them with the locking device. This effectively solves the problem of difficult connection and installation of the last module in the middle node of an eight-module structure, improving construction convenience. Construction is less affected by the environment, has high construction and disassembly efficiency, and facilitates the building's reusability. For temporary buildings, this connection method facilitates disassembly and reassembly, contributing to the building's reusability while avoiding unnecessary costs and complexity from excessive reinforcement. Attached Figure Description

[0021] The present application will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated representations, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 This is a structural schematic diagram of the modular unit beam and column provided in an embodiment of the present utility model;

[0023] Figure 2 This is a structural schematic diagram of an example of a steel connector provided in an embodiment of the present utility model;

[0024] Figure 3 A top view of an example of a steel connector provided in an embodiment of this utility model;

[0025] Figure 4 A structural schematic diagram of the four modular unit beam-column assembly provided in this embodiment of the utility model;

[0026] Figure 5 Structural schematic diagrams of the four modular unit beams and columns and steel connectors provided in this embodiment of the utility model;

[0027] Figure 6 Structural schematic diagrams of five modular unit beams and columns and steel connectors provided for embodiments of this utility model;

[0028] Figure 7 Structural schematic diagram of the seven modular unit beams and columns and steel connectors provided for embodiments of this utility model;

[0029] Figure 8 A schematic diagram of the assembly process of the last module unit beam and column provided in this embodiment of the utility model;

[0030] Figure 9 This is a schematic diagram of an example of a modular steel structure connection node (excluding locking components) provided in an embodiment of this utility model.

[0031] Figure 10 This is a structural schematic diagram of Example 2 of the steel connector provided in the embodiments of this utility model;

[0032] Figure 11 This is a schematic diagram of Example 2 of the modular steel structure connection node provided in this embodiment of the present utility model.

[0033] In the diagram, 1 is a modular unit beam / column; 11 is a steel column; 12 is a channel steel; 121 is the first screw hole; 2 is a steel connector; 21 is a cover plate; 211 is the second screw hole; 212 is the center part; 213 is the outer extension part; 22 is an L-shaped steel; and 3 is a locking component. Detailed Implementation

[0034] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0035] like Figure 1 , Figure 2 and Figure 7 As shown, this utility model provides a modular steel structure connection node, including modular unit beam-column 1, steel connector 2, and locking member 3. The modular unit beam-column 1 includes a hollow steel column 11 and a channel steel 12. The cross-sectional shape of the steel column 11 is rectangular, providing structural support and installation space for other components. The channel steel 12 is welded to the corresponding side wall of the steel column 11, and multiple first screw holes 121 are provided on the channel steel 12. The steel connector 2 includes a cover plate 21 and L-shaped steel 22. Multiple L-shaped steel 22 are respectively set at the center of both sides of the cover plate 21. The L-shaped steel 22 can be inserted into the corresponding steel column 11 and fit against the inner wall of the steel column 11, which enhances the rigidity and stability of the connection point. The cover plate 21 has a second screw hole 211 that matches the first screw hole 121. The locking member 3 can pass through the second screw hole 211 and the first screw hole 121 to fix the channel steel 12 and the cover plate 21, which not only facilitates quick assembly and disassembly on site, but also provides sufficient strength and stability.

[0036] This embodiment uses a cover plate 21 as a connector, reducing material damage caused by excessive openings in beams and columns in existing joints, thereby improving the mechanical properties of the joint. Simultaneously, a first screw hole 121 is pre-set on the channel steel 12 and a second screw hole 211 is pre-set on the cover plate 21. The locking element 3 is used for connection instead of traditional welding, reducing the possibility of brittle failure of beams and columns and improving the reliability and durability of the joint. Furthermore, since each component is pre-manufactured and has pre-set first screw holes 121 or second screw holes 211, on-site construction only requires simple alignment of the components and fixing them with the locking element 3. This effectively solves the problem of difficult connection and installation of the last module in the middle node of the eight modules, improving construction convenience. Construction is less affected by the environment, with high construction and disassembly efficiency, contributing to the building's reusability. For temporary buildings, this connection method facilitates damage detection and repeated installation and disassembly, contributing to the building's reusability while avoiding unnecessary costs and complexity from excessive reinforcement.

[0037] It should be noted that in this embodiment, L-shaped steel 22 is used as a limiting and module auxiliary installation component. L-shaped steel 22 is used to laterally constrain steel column 11, and finally fixed connection is achieved by locking member 3 to achieve the stability of the overall node. This effectively reduces the complexity of the node, helps to solve the problem of difficult installation of the last module of the eight-module node, and improves the convenience of construction.

[0038] Furthermore, channel steel 12 is welded to the top of the two adjacent side walls of the steel column 11, which increases the rigidity of the steel column 11 and the stability of the overall structure. When the steel column 11 is subjected to lateral force or torque, the above-mentioned structure can effectively disperse stress and reduce the risk of local deformation. The flange of the channel steel 12 near the top of the steel column 11 has a first screw hole 121 for fixing to the cover plate 21 or other connecting parts. By using the locking piece 3 passing through these pre-set first screw holes 121 and second screw holes 211, there is no need to drill on site, which makes the subsequent assembly work simpler and faster, improves work efficiency, and reduces the possibility of errors.

[0039] It should be noted that the shape and number of the first screw hole 121 and the second screw hole 211 are adjusted according to the performance requirements of the node. In this embodiment, a row of two columns of circular screw holes are provided. With the above configuration, the modular steel structure connection node is easy to inspect, disassemble, replace, and reinforce, extending the service life of the structure. Disassembly only requires reversing the assembly process, which is simple and convenient and avoids unnecessary damage to wooden components, thus facilitating the recycling of temporary modular buildings. Furthermore, the channel steel 12 in this embodiment is a right-angle channel steel.

[0040] Furthermore, the cover plate 21 includes a central portion 212 and multiple extension portions 213 integrally formed with the central portion 212. The extension portions 213 are portions extending outward from the central portion 212, and the central portion 212 is integrally formed. That is, the entire cover plate 21 is a single, continuous component without seams connected by welding or other means. This structure can enhance the overall integrity of the structure and reduce potential weak points. In addition, the multiple extension portions 213 are spaced apart around the axis of the central portion 212, which helps to distribute stress and can also adapt to different installation requirements or directions. The spaced arrangement can more flexibly adjust the relative position between the cover plate 21 and other components (such as the steel column 11). The second screw hole 211 is opened in the flange of the extension portion 213, and the cover plate 21 is aligned and fixed with the first screw hole 121 on the channel steel 12 by the locking member 3 (such as bolt).

[0041] It should be noted that the central portion 212 in this embodiment has high rigidity and strength, providing stable support for the entire connection structure. Furthermore, the L-shaped steel 22 in this embodiment is a right-angled L-shaped steel, and the locking element 3 is a bolt.

[0042] like Figure 1 and Figure 3 As shown, the width w1 of the channel steel 12 is half the width w2 of the extension 213, providing the necessary surface area for stress distribution. Under load, stress is not concentrated in a small area but is distributed more evenly over a wider area, thus enhancing the overall strength of the connection point. Furthermore, the wider extension 213 increases the contact area with the channel steel 12, contributing to improved overall structural stability and better resistance to external forces such as torsion and bending, resulting in a more robust structure.

[0043] Understandably, the larger width of the extension 213 provides more operational flexibility for on-site construction. For example, during alignment and fixing, the larger width allows for a certain range of error, making the installation process more flexible and convenient. At the same time, this also facilitates the alignment of the first screw hole 121 and the second screw hole 211, reducing the need for precise adjustments.

[0044] Furthermore, the cover plate 21 is cross-shaped, T-shaped, or L-shaped.

[0045] Based on the above structure, when the node form of the modular steel structure connection node is the central node of eight modules, the cover plate 21 is cross-shaped. The cross-shaped cover plate 21 can provide connection points in four directions, which is suitable for situations where a stable connection is required in multiple directions, such as the central node of eight modules. This ensures that the modules in each direction can be firmly connected together. Since the cross-shaped cover plate 21 can support and distribute the load from each module from four directions, it helps to distribute stress more evenly and reduce the risk of local overload.

[0046] like Figure 10 As shown, when the node form of the modular steel structure connection node is a four-module edge node, the cover plate 21 is T-shaped. The T-shaped cover plate 21 provides connection surfaces in three directions, which is suitable for connection at the edge position. In particular, when it is necessary to connect a module in one main direction with modules in two other perpendicular directions, it reduces the workload of adjustment and modification and improves construction efficiency.

[0047] When the node form of the modular steel structure connection node is a corner node of two modules, the cover plate 21 is L-shaped. The L-shaped cover plate 21 is used for the right-angle connection between two modules, which can well adapt to the requirements of the corner position and provide a stable connection method. Using the L-shaped cover plate 21 in the corner position can maximize the use of available space while ensuring the safety and stability of the connection.

[0048] This embodiment can select the appropriate shape of the cover plate 21 (cross-shaped, T-shaped or L-shaped) according to the specific node location, which can not only achieve a more efficient and stable structural connection, but also optimize the design for different building needs, and improve the overall building's safety, stability and durability.

[0049] Furthermore, L-shaped steel 22 is disposed at the central portion 212 to provide the main support and connection functions. The number of L-shaped steel 22 located on one side of the central portion 212 is N, where N≥1, and each side has at least one L-shaped steel 22, ensuring basic connection requirements and structural stability. Understandably, in this embodiment, "one side" refers to a surface of the cover plate 21 in a certain direction, such as the top or bottom surface. When N≥2, multiple L-shaped steel 22 are spaced apart around the axis of the central portion 212, which helps to adapt to different node connection situations, while balancing forces in various directions and improving the stability and strength of the overall structure.

[0050] According to the actual engineering needs, an appropriate number of L-shaped steel 22 can be selected to meet different connection strength requirements, which not only enhances the overall performance of the structure, but also improves construction efficiency and safety.

[0051] like Figure 1 and Figure 3 As shown, the distance L1 between the two opposing inner walls of the steel column 11 is greater than or equal to the length L2 of the L-shaped steel 22. That is, when the L-shaped steel 22 is inserted into the steel column 11, it will not be too long and exceed the limit of the steel column 11, thus making installation impossible. This ensures that the L-shaped steel 22 can fit tightly against the inner wall of the steel column 11, but will not cause installation difficulties or unnecessary structural burden due to excessive length.

[0052] It should be noted that the length L2 of the L-shaped steel 22 and the distance L1 between the two oppositely arranged inner walls of the steel column 11 should not differ too much. In this embodiment, the length L2 of the L-shaped steel 22 is equal to the distance L1 between the two oppositely arranged inner walls of the steel column 11. By controlling the length of the L-shaped steel 22 to match the internal space of the steel column 11, the additional stress concentration or uneven distribution caused by the excessive length of the L-shaped steel 22 can be effectively avoided, which helps to limit the deformation that may occur at the joint and improve the stability of the entire structure. In addition, the L-shaped steel 22 can fit tightly against the inner wall of the steel column 11, increasing the contact area and thus improving the stability of the connection point. This not only enhances the ability of the joint to resist lateral forces but also improves the safety and durability of the overall structure.

[0053] like Figure 3 As shown, when N≥2, the distance L3 between two adjacent L-shaped steels 22 is not less than twice the wall thickness of the steel column 11. That is, a certain space is maintained between the L-shaped steels 22, rather than they are closely arranged. In this embodiment, by setting the minimum spacing between adjacent L-shaped steels 22, the problem of local stress concentration caused by the L-shaped steels 22 being too close can be avoided. The appropriate distance helps to distribute the stress at the entire node more evenly, thereby effectively limiting the possible deformation of the node.

[0054] If the distance between the L-shaped steel beams 22 is too small, it may cause unnecessary mutual influence or constraint between them, thereby affecting the stability of the overall structure. Maintaining an appropriate spacing allows each L-shaped steel beam 22 to independently perform its supporting function, improving the overall stability and load-bearing capacity of the structure. It should be noted that the distance L3 between two adjacent L-shaped steel beams 22 should not differ too much from the wall thickness of the steel column 11. In this embodiment, the distance L3 between two adjacent L-shaped steel beams 22 is equal to twice the wall thickness of the steel column 11.

[0055] Based on the above description, L-shaped steel 22 can effectively limit the lateral deformation of the column by setting its length, spacing, thickness, and / or stiffening ribs. However, it should be noted that excessive stiffening is not advisable for temporary structures. For temporary structures, especially small-span temporary exhibition halls, buildings, or exhibits, the thickness of the steel plate can be reduced to facilitate disassembly and reuse, provided that the node design meets structural performance requirements. When additional reinforcement is still needed in the node area, the bolt area can be reinforced with small-area bolt-hole steel plates, which is also convenient and quick. This facilitates the reuse of the nodes, extends the service life of the structure, and the regular structure of the nodes also allows for decorative design on the node surface.

[0056] Furthermore, the L-shaped steels 22 located on both sides of the central portion 212 are symmetrically arranged with respect to the central portion 212. This embodiment ensures that the load in the vertical direction can be more evenly distributed on the structure through symmetrical arrangement, so as to avoid local stress concentration caused by uneven load and reduce the risk of structural damage.

[0057] Furthermore, the number of channel steels 12 is n1, the number of first screw holes 121 on the channel steel 12 is n2, and the number of second screw holes 211 is n3, satisfying the following formula: n3=n1*n2. That is, each first screw hole 121 on each channel steel 12 needs a corresponding second screw hole 211 for fixing.

[0058] This embodiment clarifies the correspondence between the first screw hole 121 on the channel steel 12 and the second screw hole 211 on the cover plate 21, ensuring that each first screw hole 121 has a matching second screw hole 211. This avoids installation problems caused by mismatched screw hole numbers and guarantees the integrity and reliability of the joint. Since the screw holes on each channel steel 12 are fully utilized, the situation of some screw holes being unused is avoided, ensuring a more uniform stress distribution at the connection point, reducing the risk of structural failure caused by localized stress concentration, and thus improving the overall structural safety.

[0059] It should be noted that the number of second screw holes 211 can be adjusted according to actual engineering needs in this embodiment. For example, increasing the number of channel steel 12 or the number of first screw holes 121 on a single channel steel 12 will automatically increase the number of second screw holes 211 on the cover plate 21, so that the modular steel structure connection node can adapt to the needs of buildings of different scales and complexities.

[0060] The assembly steps for the above-mentioned modular steel structure connection nodes are as follows:

[0061] Step 1: The modular unit beams and columns 1 are hoisted and assembled four times in sequence to form the first-level assembly of the lower four modules, as follows: Figure 4 As shown;

[0062] Step 2: Hoist and install the L-shaped steel 22 of the steel connector 2 along the inner wall of the steel column 11 of the module unit beam-column 1 from top to bottom to form the second-level assembly, such as... Figure 5 As shown;

[0063] Step 3: Hoist and install the modular unit beam-column 1 from top to bottom along the steel wall of the L-shaped steel 22 of the steel connector 2, and connect and fix it using the locking parts 3 to form a five-module third-level assembly, such as... Figure 6 As shown;

[0064] Step 4: Repeat step 3 twice to form a seven-module fourth-level assembly, such as... Figure 7 As shown;

[0065] Step 5: Repeat step 3, hoisting and installing the module unit beam-column 1 from top to bottom along the steel wall of the L-shaped steel 22 of the steel connector 2, as follows. Figure 8 As shown, the locking element 3 is used to connect and fix the joint, thus completing the installation of the complete node. The complete node structure is as follows: Figure 9 As shown.

[0066] Understandably, the modular steel structure connection nodes of this embodiment can be used to construct and assemble the nodes in the eight modules shown in the above embodiment, and can also be used to construct edge nodes. When the cover plate 21 is T-shaped, there are four corresponding L-shaped steels 22, which can be used to construct and assemble edge nodes. The installation steps are as follows:

[0067] Step 1: The module unit beam and column 1 are hoisted and assembled twice in sequence to form the first-level assembly of the two lower modules;

[0068] Step 2: Hoist and install the L-shaped steel 22 of the steel connector 2 from top to bottom along the inner wall of the steel column 11 of the module unit beam and column 1 to form the second-level assembly;

[0069] Step 3: Hoist and install the module unit beam and column 1 from top to bottom along the steel wall of the L-shaped steel 22 of the steel connector 2 and connect and fix it with the locking parts 3 to form the three-module third-level assembly;

[0070] Step 4: Repeat step 3, hoisting and installing the module unit beam-column 1 from top to bottom along the steel wall of the L-shaped steel 22 of the steel connector 2. Finally, use the locking piece 3 to connect and fix it, thus completing the installation of the complete edge node. The complete edge node structure is as follows: Figure 11 As shown.

[0071] In summary, this utility model embodiment provides a modular steel structure connection node that reduces the initial weakening of columns and beams by reducing the number of bolt holes. During module hoisting, it is lowered vertically close to the column wall, and lateral displacement is restricted after hoisting. This greatly improves the ease of installation of the first bolt hole 121 and the second bolt hole 211, facilitates the disassembly and recycling of temporary structures, and can be adapted to different structural requirements by changing the number of L-shaped steel 22 on the cover plate 21. The hoisting of the last module unit only requires close contact with the adjacent module and installation of bolts through the second bolt hole 211 on the outer flange. Compared with existing modular units, the ease of installation is greatly improved, reducing the time and manpower required for construction. Furthermore, the column and beam connectors of the module form a semi-rigid connection node through the cover plate 21, insert plate, and short bolts. The cover plate 21 and insert plate enhance the structural's cooperative load-bearing performance, reducing the possibility of overall structural failure during stress.

[0072] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A modular steel structure connection node, characterized in that, include: The modular unit beam-column includes a hollow steel column and a channel steel. The steel column has a rectangular cross-sectional shape, and the channel steel is welded to the corresponding side wall of the steel column. The channel steel has multiple first screw holes. A steel connector includes a cover plate and L-shaped steel bars. Multiple L-shaped steel bars are respectively disposed at the center of both sides of the cover plate. The L-shaped steel bars can be inserted into the corresponding steel column and fit against the inner wall of the steel column. The cover plate is provided with a second screw hole that matches the first screw hole. A locking element that passes through the second screw hole and the first screw hole to secure the channel steel and the cover plate.

2. The modular steel structure connection node according to claim 1, characterized in that, The channel steel is welded to the top of the two adjacent side walls of the steel column, and the first screw hole is opened on the flange of the channel steel on the side near the top of the steel column.

3. The modular steel structure connection node according to claim 1, characterized in that, The cover plate includes a central portion and a plurality of extended portions integrally formed with the central portion. The plurality of extended portions are spaced apart around the axis of the central portion, and the second screw hole is formed on the flange of the extended portion.

4. The modular steel structure connection node according to claim 3, characterized in that, The width of the channel steel is half the width of the extension portion.

5. The modular steel structure connection node according to any one of claims 2-4, characterized in that, The cover plate is cross-shaped, T-shaped, or L-shaped.

6. The modular steel structure connection node according to claim 3, characterized in that, The L-shaped steel is disposed in the central part, and the number of L-shaped steel located on one side of the central part is N, where N≥1; When N≥2, the multiple L-shaped steels are spaced apart around the axis of the central part.

7. The modular steel structure connection node according to claim 6, characterized in that, The distance between the two opposing inner walls of the steel column is greater than or equal to the length of the L-shaped steel.

8. The modular steel structure connection node according to claim 6, characterized in that, When N≥2, the distance between two adjacent L-shaped steel sections is not less than twice the wall thickness of the steel column.

9. The modular steel structure connection node according to any one of claims 6-8, characterized in that, The L-shaped steels located on both sides of the central part are arranged symmetrically with respect to the central part.

10. The modular steel structure connection node according to claim 1, characterized in that, The number of channel steels is n1, the number of first screw holes on the channel steels is n2, and the number of second screw holes is n3, satisfying the following formula: n3=n1*n2.

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