Assembly type steel frame column splicing joint

Abstract

The utility model discloses an assembly type steel frame column splicing joint, which belongs to the technical field of constructional engineering and comprises an upper column and a lower column which correspond to each other up and down. The ribs are fixedly connected to the four outer sides of the bottom end of the upper column and the four outer sides of the top end of the lower column respectively. The connecting assembly wraps the outer side of the joint of the upper column and the lower column, rib inserting grooves are formed in the positions, corresponding to the ribs, of the inner wall of the connecting assembly, the connecting assembly comprises a first connecting piece and a second connecting piece, and the connecting assembly is formed by detachably connecting the first connecting piece and the second connecting piece on the two axial sides of the upper column or the lower column; the material yield point of the connecting assembly is lower than the yield points of the upper column, the lower column and the ribs. The connecting assembly wraps the column connecting position, the ribs are matched with the inserting grooves to transmit bending moment, and integrity is enhanced; detachable design simplifies installation and reduces cost; the low-yield-point material consumes energy preferentially to protect the main body; the module is replaced after an earthquake, rapid recovery is achieved, repair cost is saved, and traditional connection problems are solved.

Description

A prefabricated steel frame column splicing node Technical Field

[0001] This utility model belongs to the field of building engineering technology, and in particular relates to a prefabricated steel frame column splicing node. Background Technology

[0002] Prefabricated steel structures have become the core carrier of green buildings due to their low carbon footprint, recyclability, efficient construction, long lifespan, and energy efficiency.

[0003] Existing prefabricated steel structures mainly employ welding, flange connections, and box-type plunger welding-core-type flange connections. However, these existing steel frame column splicing node technologies all have some significant drawbacks:

[0004] Welding connections: The construction process is cumbersome, inefficient and costly; residual welding stress leads to a decrease in structural strength, making it prone to cracking during earthquakes; quality depends on manual operation, and the reliability of testing is insufficient; welding pollution is harmful to health, and post-earthquake repair is difficult to complete quickly due to the complexity of the damage and environmental constraints.

[0005] Flange connections: require strict machining precision and are difficult to level; require a large number of bolts, are costly, are prone to fatigue under tension and bending stress, and have the risk of slippage due to uneven preload; vertical bolts are inconvenient to install and disassemble, and flanges warp and bolts fail after earthquakes, requiring large equipment for repair and making parts replacement difficult.

[0006] Box-type plunger welding - core tube connection: It is difficult to remove and replace the core tube after it is damaged, and the post-earthquake repair is very limited.

[0007] It is evident that existing technologies have shortcomings in terms of construction efficiency, load-bearing reliability, post-earthquake repair, and environmental protection, thus urgently requiring new joint technologies. Therefore, this utility model proposes a prefabricated steel frame column splicing joint. Summary of the Invention

[0008] To solve the above-mentioned technical problems, this utility model proposes a prefabricated steel frame column splicing node.

[0009] To achieve the above objectives, this utility model provides a prefabricated steel frame column splicing node, comprising:

[0010] The upper column and the lower column are vertically corresponding;

[0011] Several ribs are respectively fixed to the four outer sides of the bottom end of the upper column and the four outer sides of the top end of the lower column;

[0012] A connecting component is wrapped around the outside of the connection between the upper column and the lower column. The inner wall of the connecting component has a rib slot corresponding to the rib. The connecting component includes a first connector and a second connector. The connecting component is detachably connected to the upper column or the lower column on both axial sides by the first connector and the second connector. The yield point of the material of the connecting component is lower than the yield point of the upper column, the lower column and the rib.

[0013] Preferably, both the first connector and the second connector are C-shaped. The first connector has a buckle fixed to its end, and the second connector has a slot at its end. The first connector and the second connector are connected to each other by the buckle and the slot.

[0014] Preferably, a stiffening rib is fixedly connected inside the connection between the upper column and the lower column, with half of the stiffening rib located inside the upper column and half inside the lower column.

[0015] Preferably, the cross-section of the stiffening rib is shaped like a grid and is open at both ends.

[0016] Preferably, the edge of the stiffening rib is fixedly connected to the inner wall of the upper column or the lower column by welding.

[0017] Preferably, the stiffening rib includes two horizontal plates and two vertical plates. The top of the two horizontal plates is provided with an insertion groove, and the bottom of the two vertical plates is provided with an insertion groove. The insertion grooves of the two horizontal plates and the insertion grooves of the two vertical plates are interlocked to form the stiffening rib.

[0018] Preferably, the ribs are welded to the outside of the upper column and the lower column, and the inner wall of the connecting assembly has a weld groove corresponding to the weld of the ribs.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] The connecting component is wrapped around the outside of the connection between the upper and lower columns, and the inner wall has rib slots corresponding to the ribs. This design allows the ribs and rib slots to cooperate with each other, effectively transferring bending moments and ensuring the stress coordination and structural integrity at the joint. The connecting component is composed of a first connector and a second connector that are detachably connected on both sides of the column axis, which facilitates installation and disassembly, reducing the difficulty of manual operation and the cost of installation and replacement. The yield point of the material of the connecting component is lower than that of the upper column, lower column and ribs, so that it can undergo plastic deformation and dissipate energy first under loads such as earthquakes, becoming an "energy dissipation fuse" for the structure, thereby protecting the main column and ribs from damage and improving the seismic performance of the joint. At the same time, as a replaceable modular component, only the damaged connecting component needs to be evaluated and replaced after an earthquake, without the need for large-scale repair of the main structure, which significantly shortens the repair time, reduces the repair cost, and achieves rapid post-earthquake recovery. It is both economical and practical, and effectively solves the technical problems of large residual stress, serious construction pollution, difficult post-earthquake repair and large number of flange bolts and complex stress in traditional welded connections. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 is an exploded view of the splicing node structure of the prefabricated steel frame column of this utility model;

[0023] Figure 2 is a schematic diagram of the splicing node structure of the prefabricated steel frame column of this utility model;

[0024] Figure 3 is a schematic diagram of the first connecting member in this utility model;

[0025] Figure 4 is a schematic diagram of the structure of the second connecting member in this utility model;

[0026] Figure 5 is a schematic diagram of the stiffening rib structure in this utility model;

[0027] Figure 6 is an exploded view of the stiffening ribs in this utility model.

[0028] In the diagram: 1. Upper column; 2. Lower column; 3. Rib; 4. First connector; 5. Second connector; 6. Buckle; 7. Slot; 8. Rib slot; 9. Weld groove; 10. Stiffening rib; 101. Horizontal plate; 102. Vertical plate. Detailed Implementation

[0029] 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.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Referring to Figures 1 to 6, this embodiment provides a prefabricated steel frame column splicing node, including:

[0032] Upper pillar 1 and lower pillar 2 are vertically aligned;

[0033] Several ribs 3 are respectively fixed to the four outer sides of the bottom end of the upper column 1 and the four outer sides of the top end of the lower column 2;

[0034] The connecting component is wrapped around the outside of the connection between the upper column 1 and the lower column 2. The inner wall of the connecting component is provided with a rib slot 8 corresponding to the rib 3. The connecting component includes a first connector 4 and a second connector 5. The connecting component is detachably connected by the first connector 4 and the second connector 5 on both sides of the upper column 1 or the lower column 2 in the axial direction. The yield point of the material of the connecting component is lower than the yield point of the upper column 1, the lower column 2 and the rib 3.

[0035] The connecting component is wrapped around the outside of the connection between the upper column 1 and the lower column 2, and the inner wall has a rib slot 8 corresponding to the rib 3. This design allows the rib 3 and the rib slot 8 to cooperate with each other, effectively transferring bending moment and ensuring the stress coordination and structural integrity at the node. The connecting component is detachably connected on both sides of the column axis by the first connecting piece 4 and the second connecting piece 5, which is convenient for installation and disassembly, reducing the difficulty of manual operation and the cost of installation and replacement. The yield point of the material of the connecting component is lower than that of the upper column 1, the lower column 2 and the rib 3, so that it can undergo plastic deformation and dissipate energy first under the action of loads such as earthquakes, becoming the "energy dissipation fuse" of the structure, thereby protecting the main column and the rib 3 from damage and improving the seismic performance of the node. At the same time, as a replaceable modular component, only the damaged connecting component needs to be evaluated and replaced after the earthquake, without the need for large-scale repair of the main structure, which significantly shortens the repair time, reduces the repair cost, and achieves the function of rapid recovery after the earthquake. It is both economical and practical, and effectively solves the technical problems of large residual stress, serious construction pollution, difficult post-earthquake repair and large number of flange connection bolts and complex stress in traditional welded connections.

[0036] In a further optimized design, both the first connector 4 and the second connector 5 are C-shaped. The end of the first connector 4 is fixed with a buckle 6, and the end of the second connector 5 is provided with a slot 7. The first connector 4 and the second connector 5 are connected to each other by the buckle 6 and the slot 7.

[0037] The design employs a C-shaped first connector 4 and a second connector 5, connected via an end clip 6 and a slot 7. Drawing inspiration from traditional mortise and tenon joints, the mechanical engagement of the clip 6 and slot 7 creates a detachable, flexible connection, allowing for rapid assembly and disassembly without bolts. This significantly improves construction efficiency, making it particularly suitable for high-altitude or confined space operations, reducing manual labor difficulty and time costs. The geometry of the C-shaped component and the fit between the clip 6 and slot 7 give the joint semi-rigid connection characteristics. Under loads such as earthquakes, it can generate controllable micro-rotation and sliding, dissipating energy through friction and deformation, effectively dispersing stress concentration in the main structure and avoiding weld cracking or bolt breakage problems common in rigid connections. The design enhances the seismic resistance and energy dissipation capacity of the nodes. The standardized snap-fit ​​6 and slot 7 interfaces facilitate factory prefabrication, ensuring processing accuracy while enabling modular installation. On-site alignment and fixation can be completed quickly without complex positioning, solving the problem of reliance on high-precision bolt holes and installation deviations in traditional flange connections. As an independent energy-dissipating component, if the connecting assembly is damaged after an earthquake, it can be replaced individually through the quick separation of snap-fit ​​6 and slot 7 without disassembling the main structure, significantly shortening the repair cycle and reducing maintenance costs. Furthermore, the boltless design avoids the hidden dangers of bolt corrosion and preload attenuation, reduces anti-corrosion treatment procedures, and improves the long-term reliability and environmental friendliness of the nodes, meeting the development needs of green building and prefabricated construction.

[0038] The design is further optimized by adding a stiffening rib 10 to the connection between the upper column 1 and the lower column 2. Half of the stiffening rib 10 is located inside the upper column 1 and the other half is located inside the lower column 2.

[0039] By incorporating stiffening ribs 10 in the core area of ​​the node, a continuous support framework is formed, significantly improving the overall stiffness and load-bearing capacity of the spliced ​​node. As a key component for internal force transmission, the stiffening ribs 10 effectively distribute the load of the upper column 1 evenly to the lower column 2, preventing stress concentration at the connection point. Especially when subjected to axial pressure, bending moment, and lateral forces, they limit out-of-plane deformation of the column wall, delaying local buckling and enhancing the stability of the node under complex stress conditions. Since the stiffening ribs 10 span the connection interface between the upper and lower columns 2, they form a cohesive whole, improving the node's resistance to horizontal loads such as seismic forces. The plastic deformation of the stiffening ribs 10 dissipates energy, enhancing structural ductility and preventing brittle failure of the node.

[0040] The design was further optimized so that the cross-section of the stiffening rib 10 is shaped like a grid and is connected vertically.

[0041] The grid-shaped cross-section divides the internal space of the box column into multiple independent small areas, forming a grid support system that significantly improves the lateral stiffness and out-of-plane stability of the core area of ​​the node. This effectively limits the local buckling deformation of the column wall under lateral forces, allowing the node to maintain a more uniform stress distribution when subjected to bending moments, shear forces, and axial loads, avoiding load-bearing capacity reduction or brittle failure caused by local stress concentration. The vertically continuous grid-shaped stiffening ribs 10 span the connection interface between the upper column 1 and the lower column 2, forming a continuous force transmission path. This enhances the cooperative force-bearing capacity between the upper and lower columns 2, enabling the load to achieve a three-dimensional balanced distribution through cross-transmission. Especially under dynamic loads such as earthquakes, energy can be dissipated through the plastic deformation of the ribs, improving the ductility and seismic performance of the node. Furthermore, the regular design of the grid-shaped structure facilitates factory prefabrication, ensuring the welding accuracy of the stiffening ribs 10 and the column wall, and reducing on-site installation errors. The multiple cavities formed inside provide guiding space for concrete pouring, facilitating the formation of steel-concrete composite joints, further improving the shear strength, fire resistance, and long-term durability of the joints. It is suitable for large-span, high-load prefabricated steel frame structures, effectively solving the problem of insufficient stiffness or limited energy dissipation capacity of traditional stiffening ribs 10 under complex stress, and combining optimized mechanical properties with construction convenience.

[0042] The design was further optimized by welding the edge of the stiffening rib 10 to the inner wall of the upper column 1 or the lower column 2.

[0043] Welding achieves a rigid connection between the stiffening rib 10 and the column wall, forming a reliable force transmission path. This ensures that the stiffening rib 10 and the column work together, uniformly transferring external loads to the column wall through the welded edges, avoiding stress concentration or localized deformation caused by connection failure. The high stiffness of the welded connection effectively limits the out-of-plane displacement of the column wall, enhancing the buckling resistance of the core area of ​​the joint. Especially when subjected to complex loads such as bending moment and shear force, it significantly improves the overall stability and load-bearing capacity of the joint. Simultaneously, the durability advantage of the welded connection avoids the corrosion or loosening problems that may occur with bolted connections, reducing later maintenance costs and ensuring the reliability of the joint in long-term use. Combined with the structural design of the grid-shaped stiffening rib 10, this connection method further optimizes the stress distribution within the joint, enhances the constraint effect on the box-shaped column section, and effectively solves the problem of insufficient stiffness or localized instability caused by weak connections in traditional spliced ​​joints. This provides a strong guarantee for the efficient connection and safety performance of prefabricated steel frame columns.

[0044] Further optimization of the design: the stiffening rib 10 includes two horizontal plates 101 and two vertical plates 102. The top of the two horizontal plates 101 is provided with a insertion groove, and the bottom of the two vertical plates 102 is provided with a insertion groove. The insertion grooves of the two horizontal plates 101 and the insertion grooves of the two vertical plates 102 are interlocked to form the stiffening rib 10.

[0045] This design employs a modular plug-in structure, decomposing the stiffening rib 10 into independent components: horizontal plates 101 and vertical plates 102. Pre-set plug-in slots enable rapid assembly via a "cross-interlocking" mechanism, forming a stable grid-shaped support system without the need for full welding. This significantly improves the ease of fabrication and on-site installation efficiency of the stiffening rib 10. The precise fit of the plug-in slots ensures a rigid connection between the horizontal plates 101 and vertical plates 102, creating a continuous force transmission path. This allows the load to be evenly transferred to the column wall through the cross-interlocking of the horizontal and vertical plates 102, effectively avoiding stress concentration or geometric deviation problems caused by welding heat deformation in traditional welded stiffening ribs 10. The prefabricated horizontal plates 101 and vertical plates 102 can be precisely fabricated in the factory, reducing on-site welding workload, construction errors, and welding pollution, aligning with the green construction concept of "factory prefabrication, on-site assembly" in prefabricated buildings. The plug-in structure allows the stiffening rib 10 to be flexibly disassembled and reassembled during transportation or installation, facilitating transport and avoiding the inconvenience and risk of damage associated with transporting integral welded components. Meanwhile, the cross-shaped structure formed by the interlocking crosses inherits the high stiffness and buckling resistance of the well-type stiffening rib 10. The out-of-plane deformation of the box column is restricted by the synergistic effect of the horizontal plate 101 and the vertical plate 102, which improves the stability of the node under bending moment and shear force. Its modular design also provides convenience for later maintenance or replacement. Damaged plates can be disassembled separately without affecting the main structure. It has both mechanical performance reliability and construction economy, effectively solving the problems of high on-site welding difficulty, low assembly efficiency and inconvenient transportation of traditional stiffening rib 10.

[0046] To further optimize the design, the rib 3 is welded to the outside of the upper column 1 and the lower column 2, and a weld groove 9 is provided on the inner wall of the connecting component corresponding to the weld of the rib 3.

[0047] This design, by pre-setting a weld groove 9 on the inner wall of the connecting component, provides a dedicated space for the weld seam generated when the rib 3 is welded to the column. This effectively avoids the interference problem of weld seam protrusions on the installation of the connecting component in traditional connection methods, ensuring that the C-type connecting component can fit tightly against the column surface. This allows the rib 3 and rib slot 8 to achieve unobstructed and precise docking, improving the fit and connection accuracy of the node assembly. The presence of the weld groove 9 not only provides buffer space for welding deformation and reduces installation resistance caused by weld seam size deviations, but also ensures a continuous and stable force transmission path between the connecting component and the column. This allows the bending moment, shear force, and other loads transmitted by the rib 3 through the rib slot 8 to act evenly on the connecting component, improving the overall stress performance of the node. Furthermore, when the connecting components need to be replaced after an earthquake, the weld groove 9 can prevent the damaged connecting components from getting stuck between the weld of the rib 3, making it easy to quickly disassemble and install new components, reducing damage to the rib 3 and the column base material during the repair process, ensuring the repairability and reusability of the node, effectively solving the problems of inconvenient installation, poor fit accuracy and difficult repair caused by the protruding weld of traditional welded nodes, and realizing the organic combination of structural design and construction convenience.

[0048] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0049] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A prefabricated steel frame column splicing joint, characterized in that, include: The upper column (1) and the lower column (2) are vertically aligned; several ribs (3) are fixed to the four outer sides of the bottom end of the upper column (1) and the four outer sides of the top end of the lower column (2); a connecting component is wrapped around the outside of the connection between the upper column (1) and the lower column (2), and the inner wall of the connecting component is provided with rib slots (8) corresponding to the ribs (3). The connecting component includes a first connector (4) and a second connector (5). The connecting component is detachably connected by the first connector (4) and the second connector (5) on both axial sides of the upper column (1) or the lower column (2); the yield point of the material of the connecting component is lower than the yield point of the upper column (1), the lower column (2) and the ribs (3).

2. The prefabricated steel frame column splicing node according to claim 1, characterized in that: Both the first connector (4) and the second connector (5) are C-shaped. The end of the first connector (4) is fixed with a buckle (6), and the end of the second connector (5) is provided with a slot (7). The first connector (4) and the second connector (5) are connected to each other by the buckle (6) and the slot (7).

3. The prefabricated steel frame column splicing node according to claim 1, characterized in that: A stiffening rib (10) is fixedly connected inside the connection between the upper column (1) and the lower column (2). Half of the stiffening rib (10) is located inside the upper column (1) and half is located inside the lower column (2).

4. The prefabricated steel frame column splicing node according to claim 3, characterized in that: The stiffening rib (10) has a cross-section in the shape of a grid and is connected vertically.

5. The prefabricated steel frame column splicing node according to claim 4, characterized in that: The edge of the stiffening rib (10) is fixedly connected to the inner wall of the upper column (1) or the lower column (2) by welding.

6. The prefabricated steel frame column splicing node according to claim 4, characterized in that: The stiffening rib (10) includes two horizontal plates (101) and two vertical plates (102). The top of the two horizontal plates (101) is provided with a insertion groove, and the bottom of the two vertical plates (102) is provided with a insertion groove. The insertion grooves of the two horizontal plates (101) and the insertion grooves of the two vertical plates (102) are interlocked to form the stiffening rib (10).

7. The prefabricated steel frame column splicing node according to claim 1, characterized in that: The rib (3) is welded to the outside of the upper column (1) and the lower column (2), and a weld groove (9) is provided on the inner wall of the connecting assembly corresponding to the weld of the rib (3).

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