Steel pipe column middle layer node connecting structure
By setting a combined structure of an outer reinforcing ring plate and a short steel beam at the intermediate layer node of the steel pipe column, the problem of connecting the steel pipe column and the steel beam was solved, the ductility and bending bearing capacity of the node were improved, the construction process was simplified, the cost was reduced, and the seismic performance and stability of the structure were enhanced.
Patent Information
- Application Number
- CN202423318131.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the existing technology, the connection structure at the intermediate layer node of the circular steel tube concrete column is difficult to achieve an effective connection, especially in the construction of the walls around the elevator pit or sump pit, which presents a high construction difficulty.
The structure adopts a combination of outer reinforcing ring plate, steel beam, steel plate cover plate and longitudinal steel plate. By setting an expanded outer reinforcing ring plate at the intermediate layer node of the steel pipe column, the steel pipe column and steel beam are connected. Stress concentration is avoided by the steel plate cover plate, and the failure area is transferred by the short steel beam, ensuring that the load transfer path is clear.
It improves the ductility and flexural bearing capacity of the nodes, simplifies the construction process, reduces on-site welding work, improves construction quality and efficiency, reduces project costs, and enhances the seismic performance and stability of the structure.
Smart Images
Figure CN223706697U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel pipe column node connection technology, and more specifically, to a steel pipe column intermediate layer node connection structure. Background Technology
[0002] For structures with large spans, heavy loads, complex stresses, and irregular vertical shapes, using conventional concrete structures inevitably leads to a series of problems, such as excessively large component cross-sectional dimensions, high costs, and reduced effective space. Compared with concrete structures, steel-concrete composite structures offer advantages such as reduced component cross-sectional dimensions, lighter structural weight, reduced seismic response, increased effective space, lower project costs, and increased ductility and durability of components and the structure. Compared to ordinary reinforced concrete frame columns, circular steel tube concrete columns have excellent mechanical and seismic performance as well as ease of construction, achieving the goals of superior mechanical and seismic performance, simple construction, and cost savings.
[0003] In underground structures employing a composite structural system of circular steel tube concrete columns and steel-concrete beams, the depth of elevator pits or sump pits is generally about 2.5m deeper than the raft foundation. When the actual conditions of the foundation pit at the construction site limit the availability of support and excavation conditions for this area, the walls around the elevator shaft or sump pit can be changed from brick masonry walls to reinforced concrete walls to reduce the over-excavation depth of the raft foundation in the elevator pit or sump pit area. However, the connection structure at the intermediate layer node of the circular steel tube concrete column is not yet clearly defined, making the construction of the concrete walls around the elevator shaft or sump pit highly challenging.
[0004] It is unclear how the concrete-filled steel tube columns are connected to the steel beams, that is, it is unclear how the reinforced concrete walls are formed.
[0005] Therefore, it is necessary to provide a steel pipe column intermediate layer node connection structure to solve the above-mentioned technical problems. Utility Model Content
[0006] The purpose of this utility model is to provide a connection structure for intermediate nodes of steel pipe columns to solve the above-mentioned technical problems.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A steel pipe column intermediate layer node connection structure, installed on the steel pipe column, includes:
[0009] Multiple outer reinforcing ring plates are provided, and all are located at the intermediate layer node positions of the steel pipe column;
[0010] A steel beam is connected to the outer reinforcing ring plate;
[0011] A steel plate cover is provided at both the upper and lower ends of the outer reinforcing ring plate;
[0012] A longitudinal steel plate is disposed on the steel pipe column, and one end of the longitudinal steel plate is connected to the steel plate cover plate.
[0013] Furthermore, the outer reinforcing ring plate includes an upper flange and a lower flange connected to the steel pipe column, and the upper end of the upper flange and the lower end of the lower flange are both connected to the steel plate cover plate.
[0014] Furthermore, the steel beam includes a steel section beam, which includes a steel beam upper plate, a steel beam web plate, and a steel beam lower plate. The steel beam upper plate and the steel beam lower plate are respectively connected to the upper flange plate and the lower flange plate of the ring plate, and the upper and lower ends of the steel beam web plate are respectively connected to the steel beam upper plate and the steel beam lower plate.
[0015] Furthermore, the steel beam also includes a short steel beam, which includes an upper plate, a web, and a lower plate. The upper plate and the lower plate are respectively connected to the upper flange and the lower flange of the ring plate. The upper and lower ends of the web are respectively connected to the upper plate and the lower plate.
[0016] Furthermore, one end of the web of the steel beam and one end of the web of the short beam are connected to the steel pipe column in the horizontal direction.
[0017] Furthermore, it also includes interconnected horizontal and vertical reinforcing bars, one end of which is connected to the longitudinal steel plate;
[0018] One end of the vertical reinforcing bar located at the steel plate cover is connected to the steel plate cover, one end of the vertical reinforcing bar located at the steel beam is connected to the steel beam, and the vertical reinforcing bar located outside the steel beam runs vertically through the steel beam.
[0019] Furthermore, both the steel plate cover and the steel beam are provided with reinforcing bar sleeves, the inner wall of the reinforcing bar sleeves is provided with internal threads, and one end of the vertical reinforcing bar is provided with external threads that are compatible with the internal threads.
[0020] Furthermore, a plurality of first ribs are provided between the upper flange of the ring plate and the lower flange of the ring plate, and a second rib is provided at the upper end of the upper flange of the ring plate and the lower end of the lower flange of the ring plate. Both the first ribs and the second ribs are connected to the steel pipe column.
[0021] Furthermore, multiple casting holes are provided on both the upper and lower flanges of the ring plate, and multiple shear studs are provided at the upper end of the upper flange and the lower end of the lower flange. Multiple shear studs connected to the steel pipe column are also provided between two adjacent longitudinal steel plates.
[0022] Furthermore, the end of the steel plate cover facing the longitudinal steel plate is provided with longitudinal ribs.
[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0024] 1. This paper proposes for the first time that by setting an expanded outer reinforcing ring plate at the intermediate layer node of the steel pipe column, the bending moment and shear force in the joint area of the steel pipe column can be effectively transferred, thereby connecting the steel pipe column and the steel beam. This can improve the ductility of the joint and achieve the design goal of plastic development of the cross section at the joint far from the steel pipe column under rare earthquakes. It effectively solves the connection method and construction difficulties of the intermediate layer edge column and middle column joint of the steel pipe column and the steel beam, and has great prospects for promotion and application, providing a reference for the design and construction of similar projects.
[0025] 2. The steel plate cover plate in this scheme can avoid stress concentration in the outer reinforcing ring plate and prevent the risk of premature yielding in these parts due to stress concentration. The horizontal reinforcing bars are directly welded to the longitudinal steel plate, which replaces a large amount of on-site welding in the joint area of the steel pipe column. This reduces the on-site welding and weld quality inspection work, prevents large dispersion of weld quality during on-site welding, ensures construction quality, improves construction efficiency, shortens the construction period, saves project construction costs, and practices "carbon peaking and carbon neutrality", which has significant social benefits.
[0026] 3. The inclusion of short steel beams in this design effectively shifts the potential failure zone at the steel beam joint from the steel pipe column joint area to the cut-off position of the short steel beam, thereby improving the bending bearing capacity and ductile energy dissipation capacity of the joint and enhancing the toughness of the entire structural system.
[0027] 4. The connection method of steel pipe columns, steel beams, and short steel beams in this scheme makes the load transfer path of the poured concrete wall clear and the mechanism simple during use. The construction operation is simple, without weakening the mechanical properties of the steel pipe columns and the joint area. It meets the rigid connection requirements of the joint, makes full use of the high bearing capacity of the combination of steel pipe columns and concrete, improves the bearing capacity, seismic performance and stability of the joint area, and further improves the safety, reliability and ductility of the joint area, which has obvious economic benefits. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of the vertical reinforcing bars at the intermediate layer node of the steel pipe column of this utility model when they fall into the steel beam;
[0029] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;
[0030] Figure 3 This is a partial elevation view of the steel pipe column node of this utility model, showing the direction of the short steel beam.
[0031] Figure 4 for Figure 3 Enlarged structural diagram at point B;
[0032] Figure 5 This is a partial elevation structural diagram of the steel beam at the steel pipe column node of this utility model.
[0033] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure at the CC section;
[0034] Figure 7 for Figure 3 Schematic diagram of the cross-sectional structure at the middle DD section;
[0035] Figure 8 for Figure 7 A structural diagram showing the situation where the vertical reinforcement bars are greater than the width of the top slab of the short beam and the top slab of the steel beam.
[0036] Figure 9 This is a schematic diagram of the structure of the steel pipe column at the intermediate layer node when the vertical reinforcing bars fall outside the steel beam.
[0037] Explanation of the labels in the diagram:
[0038] 1. Steel pipe column; 2. Outer reinforcing ring plate; 21. Upper flange of the ring plate; 22. Lower flange of the ring plate; 3. Steel beam; 31. Steel section beam; 311. Upper plate of the steel beam; 312. Web of the steel beam; 313. Lower plate of the steel beam; 32. Short steel section beam; 321. Upper plate of the short beam; 322. Web of the short beam; 323. Lower plate of the short beam; 4. Steel plate cover plate; 5. Longitudinal steel plate; 6. Horizontal reinforcement; 7. Vertical reinforcement; 8. Reinforcement sleeve; 9. First rib plate; 10. Second rib plate; 11. Casting hole; 12. Shear stud; 13. Longitudinal reinforcement. Detailed Implementation
[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0040] Please see Figure 1-9 A steel pipe column intermediate layer node connection structure, installed on steel pipe column 1, includes:
[0041] The outer reinforcing ring plate 2 is provided in multiple locations, all of which are located at the intermediate layer nodes of the steel pipe column 1;
[0042] Steel beam 3 is connected to the outer reinforcing ring plate 2;
[0043] Steel plate cover plate 4 is installed at the upper and lower ends of the outer reinforcing ring plate 2;
[0044] A longitudinal steel plate 5 is installed on the steel pipe column 1, and one end of the longitudinal steel plate 5 is connected to the steel plate cover plate 4.
[0045] Construction steps for reinforced concrete walls around elevator shafts or sump pits:
[0046] S1. The concrete wall is constructed by prefabricating steel pipe columns 1 in the factory, and assembling and welding the outer reinforcing ring plate 2, steel beam 3, steel plate cover plate 4 and longitudinal steel plate 5.
[0047] S2. Transport the assembled steel pipe column 1 to the construction site;
[0048] S3. Fix the steel pipe column 1 to the designated position and install the components at the joint of the steel pipe column 1.
[0049] S4. Tie steel bars at 3 points on the steel beam to form the frame of the reinforced concrete wall;
[0050] S5. Pour concrete, which will solidify to form a reinforced concrete wall.
[0051] This design, for the first time, proposes to install an expanded outer reinforcing ring plate 2 at the intermediate layer node of the steel pipe column 1. The outer reinforcing ring plate 2 can effectively transfer the bending moment and shear force in the node area of the steel pipe column 1, serving to connect the steel pipe column 1 and the steel beam 3. This improves the ductility of the node and achieves the design goal of achieving plastic development of the cross-section at nodes far from the steel pipe column 1 under rare earthquake loading. The location and number of the outer reinforcing ring plates 2 can be determined based on the cross-sectional height of the steel beam 3.
[0052] This design effectively solves the difficulties in the connection method and construction of the intermediate layer side column and middle column nodes connecting steel pipe column 1 and steel beam 3. This research concept is applied for the first time in the field of steel pipe column 1 structural design and has great prospects for promotion and application, providing a reference for the design and construction of similar projects.
[0053] The steel plate cover 4 prevents stress concentration in the outer reinforcing ring 2, thus mitigating the risk of premature yielding due to stress concentration in these areas. The outer reinforcing ring 2, steel beam 3, steel plate cover 4, longitudinal steel plate 5, and steel pipe column 1 are pre-assembled in the factory. On-site, the horizontal reinforcing bars are directly welded to the longitudinal steel plate 5, replacing extensive on-site welding in the joint area of the steel pipe column 1. This reduces on-site welding and weld quality inspection, prevents significant variations in weld quality during on-site welding, ensures construction quality, improves construction efficiency, shortens the construction period, saves construction costs, and embodies the principles of "carbon peaking and carbon neutrality," demonstrating significant social benefits.
[0054] In this embodiment, please refer to Figure 1-5 and Figure 7-8 The outer reinforcing ring plate 2 includes an upper flange plate 21 and a lower flange plate 22 connected to the steel pipe column 1. The upper end of the upper flange plate 21 and the lower end of the lower flange plate 22 are both connected to the steel cover plate 4. The thickness of the longitudinal steel plate 5 is greater than the thickness of the upper flange plate 21 and the lower flange plate 22 of the ring plate. The height of the longitudinal steel plate 5 is the same as the height of the reinforced concrete wall, which can improve the strength of the longitudinal steel plate 5 and meet the structural requirements of the reinforced concrete wall.
[0055] In this embodiment, please refer to Figure 1-3 , Figure 5 and Figure 7-8 The steel beam 3 includes a steel beam 31, which includes an upper steel beam 311, a web 312, and a lower steel beam 313. The upper steel beam 311 and the lower steel beam 313 are respectively connected to the upper flange 21 and the lower flange 22 of the ring plate. The upper and lower ends of the web 312 are respectively connected to the upper steel beam 311 and the lower steel beam 313.
[0056] The steel beam 3 also includes a steel short beam 32, which includes a short beam upper plate 321, a short beam web 322, and a short beam lower plate 323. The short beam upper plate 321 and the short beam lower plate 323 are respectively connected to the upper flange plate 21 and the lower flange plate 22 of the ring plate. The upper and lower ends of the short beam web 322 are respectively connected to the short beam upper plate 321 and the short beam lower plate 323.
[0057] The short steel beam 32 is shorter than the steel beam 31. The area where the short steel beam 32 is broken can be called the cut-off point. The reinforcing bars of the reinforced concrete wall run vertically through the cut-off point. The installation of the short steel beam 32 effectively transfers the potential failure zone at the joint of the steel beam 31 from the joint area of the steel pipe column 1 to the cut-off point of the short steel beam 32, thereby improving the bending bearing capacity and ductile energy dissipation capacity of the joint and enhancing the toughness of the entire structural system.
[0058] The connection method between the steel pipe column 1, the steel beam 31, and the short steel beam 32 makes the load transfer path of the poured concrete wall clear and the mechanism simple during use. The construction operation is simple, without weakening the mechanical properties of the steel pipe column 1 and the joint area. It meets the rigid connection requirements of the joint, makes full use of the high bearing capacity of the combination of steel pipe column 1 and concrete, improves the bearing capacity, seismic performance and stability of the joint area, and further improves the safety, reliability and ductility of the joint area, which has obvious economic benefits.
[0059] In this embodiment, please refer to Figure 1 and Figure 3-5One end of the web 312 of the steel beam and the web 322 of the short beam are connected to the steel pipe column 1 in the horizontal direction. The web 312 of the steel beam and the web 322 of the short beam are welded to the steel pipe column 1, ensuring that the steel beam 31 and the short steel beam 32 are rigidly connected to the steel pipe column 1. This can effectively improve the bearing capacity of the joint area of the steel pipe column 1, thereby enhancing the overall strength, stiffness and stability of the joint area.
[0060] In this embodiment, please refer to Figure 3-8 It also includes interconnected horizontal reinforcing bars 6 and vertical reinforcing bars 7, with one end of the horizontal reinforcing bars 6 connected to the longitudinal steel plate 5;
[0061] One end of the vertical reinforcing bar 7 located at the steel plate cover plate 4 is connected to the steel plate cover plate 4, and one end of the vertical reinforcing bar 7 located at the steel beam 3 is connected to the steel beam 3. The end of the steel plate cover plate 4 facing the longitudinal steel plate 5 is provided with longitudinal reinforcing bar 13, and the vertical reinforcing bar 7 located outside the steel beam 3 runs through the steel beam 3 vertically.
[0062] After the steel pipe column 1 is transported to the construction site and installed, the longitudinal reinforcement 13 is welded to the steel plate cover plate 4 at the upper and lower ends of the steel beam 31 and the short steel beam 32, and the horizontal reinforcement 6 is welded to the longitudinal steel plate 5. This replaces the method of requiring a lot of on-site welding in the joint area of the steel pipe column 1, reduces the on-site welding and weld quality inspection work, prevents large dispersion of weld quality during on-site welding, ensures construction quality, improves construction efficiency, shortens the construction period, and saves project construction costs.
[0063] The horizontal reinforcing bars 6 and the vertical reinforcing bars 7 are tied together with stirrups, forming a frame in front of the reinforced concrete wall construction through cooperation with the steel beams 31 and the short steel beams 32.
[0064] If the width of the upper slab 311 of the steel beam and the upper slab 321 of the short beam are greater than the width of the concrete wall frame, then part of the vertical reinforcement 7 will fall on the upper slab 311 of the steel beam or the upper slab 321 of the short beam. In this case, one end of the vertical reinforcement 7 will be connected to the upper slab 311 of the steel beam or the upper slab 321 of the short beam, while the vertical reinforcement 7 at the cut-off position of the upper slab 321 of the short beam will be continuous from top to bottom. Figure 3-7 The state shown;
[0065] If the width of the upper slab 311 of the steel beam and the upper slab 321 of the short beam are less than the width of the concrete wall frame, that is, if the vertical reinforcement 7 does not fall on the upper slab 311 of the steel beam or the upper slab 321 of the short beam, then the vertical reinforcement 7 will be continuous vertically and will not interfere with the upper slab 311 of the steel beam or the upper slab 321 of the short beam. Figure 8-9 The state shown.
[0066] In this embodiment, please refer to Figure 1 , Figure 3-5 and Figure 7Both the steel plate cover plate 4 and the steel beam 3 are equipped with steel bar sleeves 8. The inner wall of the steel bar sleeve 8 is provided with internal threads, and one end of the vertical steel bar 7 is provided with external threads that are compatible with the internal threads. The steel bar sleeve 8 can be connected to the vertical steel bars 7 that fall on the upper plate 311 of the steel beam or the upper plate 321 of the short beam. The operation is simple and convenient, avoiding welding and improving work efficiency.
[0067] In this embodiment, please refer to Figure 1-3 , Figure 5 and Figure 7-8 Multiple first ribs 9 are provided between the upper flange 21 and the lower flange 22 of the ring plate. Second ribs 10 are provided at the upper end of the upper flange 21 and the lower end of the lower flange 22 of the ring plate. Both the first ribs 9 and the second ribs 10 are connected to the steel pipe column 1. This improves the strength, stiffness, and stability of the upper flange 21 and the lower flange 22 of the ring plate.
[0068] In this embodiment, please refer to Figure 1-2 and Figure 7-8 Multiple casting holes 11 are provided on the upper flange 21 and the lower flange 22 of the ring plate. Multiple shear studs 12 are provided at the upper end of the upper flange 21 and the lower end of the lower flange 22 of the ring plate. Multiple shear studs 12 connected to the steel pipe column 1 are also provided between two adjacent longitudinal steel plates 5.
[0069] This design allows the pouring hole 11 to facilitate the subsequent pouring of concrete at the position of the steel beam 3 of the steel pipe column 1; the setting of the shear stud 12 can effectively increase the bonding effect between the additional corbel at the joint and the concrete wall, ensure the coordinated work with the concrete wall, prevent the concrete wall from slipping significantly, improve the safety of the joint area, and has obvious social benefits.
[0070] Shear studs 12 are also provided at the upper ends of the upper plate 311 of the steel beam and the upper plate 321 of the short beam, which are equidistant from the horizontal reinforcing bars 6. Shear studs 12 are also provided at the longitudinal steel plate 5 on the steel pipe column 1. This can effectively enhance the synergistic work between the steel pipe column 1, the outer reinforcing ring plate 2, the steel beam 31, the steel short beam 32, the shear studs 12, and the subsequently poured concrete wall, thereby improving the overall strength, stiffness, and stability.
[0071] It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
[0072] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.
[0073] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
Claims
1. A steel pipe column intermediate layer node connection structure, disposed on a steel pipe column (1), characterized in that, include: The outer reinforcing ring plate (2) is provided in multiple locations, all of which are located at the intermediate layer node positions of the steel pipe column (1); The steel beam (3) is connected to the outer reinforcing ring plate (2); A steel plate cover (4) is provided at the upper and lower ends of the outer reinforcing ring plate (2); A longitudinal steel plate (5) is disposed on the steel pipe column (1), and one end of the longitudinal steel plate (5) is connected to the steel plate cover plate (4).
2. The intermediate layer node connection structure of a steel pipe column according to claim 1, characterized in that, The outer reinforcing ring plate (2) includes an upper flange plate (21) and a lower flange plate (22) connected to the steel pipe column (1). The upper end of the upper flange plate (21) and the lower end of the lower flange plate (22) are both connected to the steel plate cover plate (4).
3. The intermediate layer node connection structure of a steel pipe column according to claim 2, characterized in that, The steel beam (3) includes a steel beam (31), which includes an upper plate (311), a web (312), and a lower plate (313). The upper plate (311) and the lower plate (313) are respectively connected to the upper flange (21) and the lower flange (22) of the ring plate. The upper and lower ends of the web (312) are respectively connected to the upper plate (311) and the lower plate (313).
4. The intermediate layer node connection structure of a steel pipe column according to claim 3, characterized in that, The steel beam (3) also includes a short steel beam (32), which includes an upper plate (321), a web (322), and a lower plate (323). The upper plate (321) and the lower plate (323) are respectively connected to the upper flange (21) and the lower flange (22) of the ring plate. The upper and lower ends of the web (322) are respectively connected to the upper plate (321) and the lower plate (323).
5. The intermediate layer node connection structure of a steel pipe column according to claim 4, characterized in that, One end of the web of the steel beam (312) and the web of the short beam (322) in the horizontal direction is connected to the steel pipe column (1).
6. The intermediate layer node connection structure of a steel pipe column according to claim 4, characterized in that, It also includes interconnected horizontal reinforcing bars (6) and vertical reinforcing bars (7), one end of which is connected to the longitudinal steel plate (5); One end of the vertical reinforcing bar (7) located at the steel plate cover (4) is connected to the steel plate cover (4), and one end of the vertical reinforcing bar (7) located at the steel beam (3) is connected to the steel beam (3). The vertical reinforcing bar (7) located outside the steel beam (3) passes through the steel beam (3) vertically.
7. The intermediate layer node connection structure of a steel pipe column according to claim 6, characterized in that, Both the steel plate cover (4) and the steel beam (3) are provided with steel bar sleeves (8). The inner wall of the steel bar sleeve (8) is provided with internal threads, and one end of the vertical steel bar (7) is provided with external threads that are compatible with the internal threads.
8. The intermediate layer node connection structure of a steel pipe column according to claim 2, characterized in that, Multiple first ribs (9) are provided between the upper wing plate (21) and the lower wing plate (22) of the ring plate. The upper end of the upper wing plate (21) and the lower end of the lower wing plate (22) of the ring plate are provided with second ribs (10). The first ribs (9) and the second ribs (10) are both connected to the steel pipe column (1).
9. The intermediate layer node connection structure of a steel pipe column according to claim 2, characterized in that, Multiple casting holes (11) are provided on the upper flange (21) and lower flange (22) of the ring plate. Multiple shear studs (12) are provided at the upper end of the upper flange (21) and the lower end of the lower flange (22). Multiple shear studs (12) connected to the steel pipe column (1) are also provided between two adjacent longitudinal steel plates (5).
10. The intermediate layer node connection structure of a steel pipe column according to claim 1, characterized in that, The steel plate cover (4) has a longitudinal rib (13) at one end facing the longitudinal steel plate (5).