Steel structure outer corner column end embedded connection node structure and connection method
Patent Information
- Application Number
- CN202610574658.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-28
- Publication Date
- 2026-08-21
AI Technical Summary
该方法实施过程简单、实施成本低，其能解决现有连接方式节点外露明显、现场装配容错性不足、竖向承压与水平抗剪路径不够集中以及耗能能力不足等问题，能可靠高效地实现上下双模块连接场景的装配作业
1、本发明将导向、承压、抗剪和耗能功能集中布置在柱端内部，形成上柱→承压套→承压底座→下柱的连续竖向受力路径，以及上柱、剪力键、弹性耗能机构、剪力键、下柱的水平抗剪路径，传力明确，节点受力更集中。
Smart Images
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of prefabricated steel structure building technology, specifically relating to a steel structure outer corner column end embedded connection node structure and connection method. Background Technology
[0002] Modular steel structure buildings are a highly prefabricated industrialized construction system. The main frame of the modular units can be prefabricated in the factory, and the enclosure structure, electromechanical pipelines, and some decoration structures can be integrated simultaneously. After being transported to the construction site, hoisting and assembly operations are carried out. Compared with the traditional cast-in-place construction mode, modular buildings have many technical advantages such as shorter construction cycle, less on-site wet work, and stronger controllability of component quality. They are now widely used in various engineering scenarios such as dormitories, offices, hotels, medical facilities, and temporary buildings.
[0003] In column-supported modular steel structure systems, the corner column end nodes are the core components for vertical load bearing and horizontal force transfer between upper and lower modules. Existing modular connection nodes mainly fall into two categories: one relies on end plates, inserts, sliding components, and high-strength bolts to adjust for installation errors; the other employs transverse insertion and self-locking spring-loaded structures to meet the needs of rapid module assembly. While existing technologies can address specific assembly or connection issues, they still have many shortcomings for the special connection conditions of upper and lower double-module column ends at the corner. Common defects include exposed nodes, poor on-site assembly tolerance, dispersed vertical bearing and horizontal shear force transmission paths, and insufficient energy dissipation and vibration reduction capabilities. To address these shortcomings, there is an urgent need for an embedded column end connection node adapted to the upper and lower double-module conditions at the corner of modular steel structures, to meet the comprehensive requirements of safe load bearing, efficient assembly, and seismic energy dissipation in modular steel structure buildings. Summary of the Invention
[0004] To address the problems existing in the prior art, this invention provides a steel structure with an embedded connection node structure and connection method at the outer corner column end. This node structure is compact, enabling rapid assembly of upper and lower modular units, and simultaneously considering vertical load-bearing capacity, horizontal shear resistance, and energy dissipation buffering, ensuring the stability and safety of the assembly. This method is simple to implement and has low implementation costs. It solves problems such as obvious exposed nodes, insufficient on-site assembly tolerance, insufficient concentration of vertical load-bearing and horizontal shear resistance paths, and insufficient energy dissipation capacity in existing connection methods, enabling reliable and efficient assembly operations in scenarios involving upper and lower dual-module connections.
[0005] To achieve the above objectives, the present invention provides a steel structure outer corner column end embedded connection node structure, including an upper module corner column and a lower module corner column, an upper L-shaped outer corner frame, a lower L-shaped outer corner frame, a pressure-bearing base, an elastic energy dissipation mechanism, a guide column, a pressure-bearing sleeve and a shear key; Both the upper and lower module corner posts are square tubular structures and are distributed vertically relative to each other. The lower end of the upper module corner post has a lower mounting cavity, and the upper end of the lower module corner post has an upper mounting cavity. The lower end of the corner column of the upper module has two upper semi-rectangular grooves on the adjacent two side columns, which are connected to the lower mounting cavity; the upper end of the corner column of the lower module has two lower semi-rectangular grooves on the adjacent two side columns, which are connected to the upper mounting cavity, and the two lower semi-rectangular grooves and the two upper semi-rectangular grooves are distributed vertically opposite to each other to form two rectangular mounting channels. The upper L-shaped outer corner frame and the lower L-shaped outer corner frame are distributed opposite each other, and the upper L-shaped outer corner frame is fixedly connected to the lower outer side of the upper module corner column, and the lower L-shaped outer corner frame is fixedly connected to the upper outer side of the lower module corner column. The pressure-bearing base is fixedly installed inside the upper mounting cavity; The lower end of the elastic energy dissipation mechanism is fixedly installed on the upper end of the pressure-bearing base; The guide column is vertically arranged, and its lower end is installed on the upper end of the elastic energy dissipation mechanism; The pressure-bearing sleeve is fixedly installed inside the lower mounting cavity, and a pressure-bearing cavity is opened at the center of its bottom, and a sleeve relationship is formed with the upper end of the guide column through the pressure-bearing cavity; The shear key has a strip-shaped structure. Two shear keys are horizontally inserted into two rectangular mounting slots, and the inner end of each shear key is fixedly connected to the upper end of the elastic energy dissipation mechanism.
[0006] To improve assembly reliability, a pair of limiting blocks are fixedly connected at intervals along the length of the upper end of the shear key, with the pair of limiting blocks located on the inner and outer sides of the upper module corner column wall respectively; a limiting plate is fixedly connected to the outer end of the shear key, and the limiting plate is used to limit the movement of the column walls of the upper module corner column and the lower module corner column.
[0007] To facilitate limiting the depth of the upper end of the guide post 9 into the pressure-bearing cavity, a limiting ring is fixedly fitted on the outer side of the middle section of the guide post, and the limiting ring is matched with the lower end of the pressure-bearing sleeve for limiting.
[0008] As a preferred embodiment, the upper L-shaped outer corner frame consists of two upper module floor beams respectively welded to the two adjacent orthogonal column walls of the upper module corner column; the lower L-shaped outer corner frame consists of two lower module ceiling beams respectively welded to the two adjacent orthogonal column walls of the lower module corner column.
[0009] As a preferred embodiment, the top of the guide post has a conical structure, while the rest has a columnar structure.
[0010] As a preferred embodiment, both the upper and lower module corner posts are made of square steel tubular columns.
[0011] As a preferred embodiment, the pressure-bearing base is installed in the upper mounting cavity by welding, nesting, or integral molding.
[0012] As a preferred embodiment, the elastic energy dissipation mechanism is any one or more combinations of elastic damping components, metal energy dissipation components, and sliding energy dissipation components.
[0013] To facilitate real-time monitoring of node health and assembly status, a status sensing unit is also included. The status sensing unit is embedded in the column wall surface of the upper module corner post and / or the lower module corner post, and is used to monitor the node's strain, displacement, vibration, or locking status.
[0014] In this invention, a pressure-bearing base is fixedly installed in the upper mounting cavity of the lower module corner column, providing a bearing foundation for vertical loads. Based on this, a pressure-bearing sleeve is fixedly installed in the lower mounting cavity of the upper module corner column, forming a force application point for vertical loads. Furthermore, an elastic energy-dissipating mechanism is installed on the pressure-bearing base, and a guide post is installed on the elastic energy-dissipating mechanism, with the upper end of the guide post engaging with the pressure-bearing cavity of the pressure-bearing sleeve. This creates a continuous vertical pressure-bearing interface between the pressure-bearing sleeve and the pressure-bearing base based on the engagement pressure relationship. Simultaneously, the guide post and the pressure-bearing sleeve jointly define the relative axial positions of the upper and lower module corner columns. Additionally, the elastic energy-dissipating mechanism provides restoring force and energy-dissipating buffering capacity when nodes are subjected to shear, compression, or micro-slippage. This facilitates guiding alignment and coaxial positioning during hoisting, and improves assembly stability and safety through the energy-dissipating buffering function. By creating two upper and lower semi-rectangular slots on the upper and lower module corner posts respectively, two rectangular mounting channels are formed when the upper and lower module corner posts come into contact. Based on this, two shear keys are horizontally inserted into the two rectangular mounting channels, allowing each shear key to simultaneously embed into both the upper and lower module corner posts, thus forming a shear-resistant locking structure spanning the upper and lower connection interfaces. The inner ends of both shear keys are fixedly connected to the upper end of the elastic energy dissipation mechanism. This allows the elastic energy dissipation mechanism and the shear keys to work together to provide energy dissipation when the node is subjected to shear or experiences slight slippage. This invention uses the embedded column end as the basic structural boundary. By constructing a collaborative system of bearing sleeve, guide column, shear key, bearing base, and elastic energy dissipation mechanism between the bottom of the upper module corner column and the top of the lower module corner column, the resulting connection node structure is located only between the upper and lower module corner columns at the same outer corner position. Unlike exposed sleeve nodes, this invention does not use external connectors that enclose the column body, does not connect the beam end, and does not form an enclosed node. Instead, it uses the embedded column end as the basic feature, ultimately achieving rapid assembly and reliable connection of the upper and lower double modules at the outer corner.
[0015] The node structure is compact and is embedded inside the column end. It integrates multiple functions such as guiding alignment, continuous vertical bearing, cross-boundary collaborative shear resistance and energy dissipation buffer without occupying the effective space at the beam end. It optimizes the force transmission path, enables rapid assembly of upper and lower module units, and takes into account vertical bearing, horizontal shear resistance and energy dissipation buffer, ensuring the stability and safety of the assembly operation.
[0016] This invention also provides a connection method for embedded connection nodes at the outer corner column ends of a steel structure, employing an embedded connection node structure at the outer corner column ends of a steel structure, comprising the following steps: Step 1: Install a pressure-bearing base in the upper mounting cavity of the lower module corner post, and install an elastic energy-dissipating mechanism on the pressure-bearing base, and install a guide post on the elastic energy-dissipating mechanism; at the same time, install a pressure-bearing sleeve in the lower mounting cavity of the upper module corner post. Step 2: Hoist the upper module corner post as a whole above the lower module corner post, and slowly lower the upper module corner post vertically from top to bottom to the set height above the lower module corner post. At the same time, align the two upper semi-rectangular slots on the upper module corner post with the two lower semi-rectangular slots on the lower module corner post; simultaneously, slide the conical head of the guide post into the pressure-bearing cavity of the pressure sleeve to complete the alignment of the upper and lower module corner posts. Step 3: Continue to lower the upper module corner post until the pressure sleeve makes pressure contact with the pressure base through the guide post, and the two upper half rectangular grooves and the two lower half rectangular grooves form two rectangular installation channels; Step 4: Insert the two shear keys horizontally from the side of the column into the two rectangular mounting slots to complete the cross-boundary locking of the upper and lower module corner columns; Step 5: Install the status sensing unit on the outer side of the upper module corner column wall and / or the outer side of the lower module corner column wall at the target monitoring location, and conduct acceptance testing at the connection nodes.
[0017] This invention provides a connection method for embedded connection nodes at the outer corner column ends of steel structures, which has the following advantages compared with the prior art: 1. This invention concentrates the guiding, pressure-bearing, shear-resistant, and energy-dissipating functions inside the column end, forming a continuous vertical force path from upper column to pressure-bearing sleeve to pressure-bearing base to lower column, as well as a horizontal shear-resistant path from upper column to shear key, elastic energy-dissipating mechanism, shear key, and lower column. The force transmission is clear and the force at the nodes is more concentrated.
[0018] 2. In this invention, the nodes are embedded inside the column end and are not exposed as sleeves or external components. They do not occupy the beam end space and do not damage the integrity of the internal decoration of the modular unit. This makes it suitable for the rapid assembly of the outer corner of column-supported modular buildings.
[0019] 3. This invention improves the fault tolerance of the upper and lower module hoisting and alignment by using the guide head and the pressure sleeve, which can reduce the difficulty of on-site installation; and forms a cross-boundary lock by using the lateral insertion shear key, which facilitates on-site post-installation and replacement.
[0020] 4. This invention improves the ductility and operational safety of the outer corner connection area by incorporating an energy-dissipating structure within the node, which can absorb some of the input energy under horizontal shear, micro-slippage, or vibration. Furthermore, combined with a state sensing unit, it enables monitoring of the node's service status. This method is simple to implement and has low implementation costs. It solves problems such as obvious node exposure, insufficient on-site assembly tolerance, insufficient concentration of vertical bearing and horizontal shear resistance paths, and insufficient energy dissipation capacity in existing connection methods. It can reliably and efficiently realize assembly operations in scenarios involving the connection of upper and lower dual modules. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of the node structure in this invention; Figure 2 yes Figure 1 A sectional view; Figure 3 This is an exploded view of the node structure in this invention; Figure 4 These are comparison images of the node structure before and after assembly in this invention; Figure 5 This is a schematic diagram of the shear key structure in this invention; Figure 6 This is an assembly process diagram of the connection method in this invention. In the diagram: 1. Upper module corner post; 2. Lower module corner post; 3. Upper L-shaped outer corner frame; 4. Lower L-shaped outer corner frame; 5. Pressure-bearing base; 6. Upper module floor beam; 7. Lower module ceiling beam; 8. Elastic energy-dissipating mechanism; 9. Guide post; 10. Pressure-bearing sleeve; 11. Shear key; 12. Status sensing unit; 13. Limiting block; 14. Limiting plate; 15. Limiting ring. Detailed Implementation
[0022] The present invention will be further described below.
[0023] like Figure 1 As shown, this invention designs a system for connecting two modules at the same outer corner of a modular steel structure building. Both the upper and lower modules are cuboid steel frame units, with each module having only four corner columns. During on-site connection, the nodes only act between corner column 1 of the upper module and corner column 2 of the lower module; the horizontal beams exist only as frame components of the modules and do not participate in the node connection. Figure 3 As shown, the node structure in this invention can be divided into the bottom of the upper module corner post 1, the top of the lower module corner post 2, and the node components located therebetween.
[0024] Specifically, the present invention provides a steel structure outer corner column end embedded connection node structure, including upper module corner column 1 and lower module corner column 2, upper L-shaped outer corner frame 3, lower L-shaped outer corner frame 4, pressure-bearing base 5, elastic energy dissipation mechanism 8, guide column 9, pressure-bearing sleeve 10 and shear key 11; like Figure 2 As shown, the upper module corner post 1 and the lower module corner post 2 are both square tubular structures and are distributed vertically relative to each other. The lower end of the upper module corner post 1 is provided with a lower mounting cavity, and the upper end of the lower module corner post 2 is provided with an upper mounting cavity. The lower end of the upper module corner column 1 has two upper semi-rectangular grooves on the adjacent two side columns that communicate with the lower mounting cavity; the upper end of the lower module corner column 2 has two lower semi-rectangular grooves on the adjacent two side columns that communicate with the upper mounting cavity, and the two lower semi-rectangular grooves and the two upper semi-rectangular grooves are distributed vertically opposite to each other to form two rectangular mounting channels. The upper L-shaped outer corner frame 3 and the lower L-shaped outer corner frame 4 are distributed opposite each other, and the upper L-shaped outer corner frame 3 is fixedly connected to the lower outer side of the upper module corner post 1, and the lower L-shaped outer corner frame 4 is fixedly connected to the upper outer side of the lower module corner post 2. The pressure-bearing base 5 is a component inside the top of the lower module corner column 2. It is fixedly installed inside the upper mounting cavity. After installation, the upper end face of the pressure-bearing base 5 can be located below the upper end of the upper mounting cavity or flush with the upper end of the upper mounting cavity. The pressure-bearing base 5 serves as a vertical pressure-bearing foundation surface to bear the vertical load transmitted by the upper module corner column 1. The lower end of the elastic energy dissipation mechanism 8 is fixedly installed on the upper end of the pressure-bearing base 5, preferably in the central area of the upper end of the pressure-bearing base 5; The guide column 9 is vertically arranged, and its lower end is installed on the upper end of the elastic energy dissipation mechanism 8. Preferably, the lower end of the guide column 9 is located in the central area of the upper end of the elastic energy dissipation mechanism 8. When there is a hoisting error between the upper module corner column 1 and the lower module corner column 2, the lower end of the guide column 9 can also be allowed to produce a small guiding float. This float process can be achieved by fine-tuning the installation position of the guide column 9 or by adjusting the outer diameter of the guide column 9. The pressure-bearing sleeve 10 is a component inside the bottom end of the upper module corner post 1. It is fixedly installed inside the lower mounting cavity. Its outer edge is tightly fitted with the upper module corner post 1. A pressure-bearing cavity is opened at the center of its bottom to allow the upper end of the guide post 9 to slide in or out. It forms a sleeve relationship with the upper end of the guide post 9 through the pressure-bearing cavity. Preferably, the pressure-bearing sleeve 10 is installed in the lower mounting cavity of the upper module corner post 1 by interference fit, welding or mechanical fixation. The pressure-bearing sleeve 10 forms a sleeve pressure-bearing relationship with the pressure-bearing base 5. The guide post 9 and the pressure-bearing sleeve 10 jointly define the relative axial position of the upper and lower module corner posts. In this way, it is easy to achieve guiding alignment and coaxial limiting during hoisting. The shear key 11 has a strip-shaped structure. Two shear keys 11 are horizontally inserted into two rectangular mounting slots, and the inner end of each shear key 11 is fixedly connected to the upper end of the elastic energy dissipation mechanism 8. Each shear key 11 simultaneously spans the upper and lower module connection interface and works with the elastic energy dissipation mechanism 8 to form a shear-resistant locking structure that spans the upper and lower connection interface.
[0025] like Figure 5 As shown, in order to improve the reliability of assembly, preferably, the shear key 11 is a replaceable component. A pair of limiting blocks 13 are fixedly connected at intervals along the length direction at the upper end of the shear key 11. The pair of limiting blocks 13 are located on the inner and outer sides of the column wall of the upper module corner column 1, respectively. A limiting plate 14 is fixedly connected to the outer end of the shear key 11. The limiting plate 14 is used to limit the movement of the column walls of the upper module corner column 1 and the lower module corner column 2.
[0026] In order to facilitate limiting the depth of the upper end of the guide post 9 into the pressure-bearing cavity, a limiting ring 15 is fixedly fitted on the outer side of the middle section of the guide post 9, and the limiting ring 15 is matched with the lower end of the pressure-bearing sleeve 10 for limiting.
[0027] As a preferred embodiment, the upper L-shaped outer corner frame 3 is composed of two upper module floor beams 6 respectively welded to the two adjacent orthogonal column walls of the upper module corner column 1; the lower L-shaped outer corner frame 4 is composed of two lower module ceiling beams 7 respectively welded to the two adjacent orthogonal column walls of the lower module corner column 2.
[0028] As a preferred embodiment, the top of the guide post 9 has a conical structure, while the rest has a columnar structure.
[0029] As a preferred embodiment, both the upper module corner post 1 and the lower module corner post 2 are made of square steel tube columns, with a preferred cross-sectional dimension of 150×150×8mm.
[0030] As a preferred embodiment, the pressure-bearing base 5 is installed in the upper mounting cavity by welding, nesting, or integral molding, and serves as the sole vertical bearing surface of the node structure.
[0031] As a preferred embodiment, the elastic energy dissipation mechanism 8 is any one or more combinations of elastic damping components, metal energy dissipation components, and sliding energy dissipation components, and can be specifically determined according to the form of metal yielding energy dissipation, elastic damping energy dissipation, or frictional sliding energy dissipation.
[0032] To facilitate real-time monitoring of node health and assembly status, a status sensing unit 12 is also included. The status sensing unit 12 is embedded in the column wall surface of the upper module corner post 1 and / or the lower module corner post 2, and is used to monitor the node's strain, displacement, vibration, or locking status.
[0033] In this invention, a pressure-bearing base is fixedly installed in the upper mounting cavity of the lower module corner column, providing a bearing foundation for vertical loads. Based on this, a pressure-bearing sleeve is fixedly installed in the lower mounting cavity of the upper module corner column, forming a force application point for vertical loads. Furthermore, an elastic energy-dissipating mechanism is installed on the pressure-bearing base, and a guide post is installed on the elastic energy-dissipating mechanism, with the upper end of the guide post engaging with the pressure-bearing cavity of the pressure-bearing sleeve. This creates a continuous vertical pressure-bearing interface between the pressure-bearing sleeve and the pressure-bearing base based on the engagement pressure relationship. Simultaneously, the guide post and the pressure-bearing sleeve jointly define the relative axial positions of the upper and lower module corner columns. Additionally, the elastic energy-dissipating mechanism provides restoring force and energy-dissipating buffering capacity when nodes are subjected to shear, compression, or micro-slippage. This facilitates guiding alignment and coaxial positioning during hoisting, and improves assembly stability and safety through the energy-dissipating buffering function. By creating two upper and lower semi-rectangular slots on the upper and lower module corner posts respectively, two rectangular mounting channels are formed when the upper and lower module corner posts come into contact. Based on this, two shear keys are horizontally inserted into the two rectangular mounting channels, allowing each shear key to simultaneously embed into both the upper and lower module corner posts, thus forming a shear-resistant locking structure spanning the upper and lower connection interfaces. The inner ends of both shear keys are fixedly connected to the upper end of the elastic energy dissipation mechanism. This allows the elastic energy dissipation mechanism and the shear keys to work together to provide energy dissipation when the node is subjected to shear or experiences slight slippage. This invention uses the embedded column end as the basic structural boundary. By constructing a collaborative system of bearing sleeve, guide column, shear key, bearing base, and elastic energy dissipation mechanism between the bottom of the upper module corner column and the top of the lower module corner column, the resulting connection node structure is located only between the upper and lower module corner columns at the same outer corner position. Unlike exposed sleeve nodes, this invention does not use external connectors that enclose the column body, does not connect the beam end, and does not form an enclosed node. Instead, it uses the embedded column end as the basic feature, ultimately achieving rapid assembly and reliable connection of the upper and lower double modules at the outer corner.
[0034] The node structure is compact and is embedded inside the column end. It integrates multiple functions such as guiding alignment, continuous vertical bearing, cross-boundary collaborative shear resistance and energy dissipation buffer without occupying the effective space at the beam end. It optimizes the force transmission path, enables rapid assembly of upper and lower module units, and takes into account vertical bearing, horizontal shear resistance and energy dissipation buffer, ensuring the stability and safety of the assembly operation.
[0035] like Figure 6 As shown, the present invention also provides a connection method for embedded connection nodes at the outer corner column ends of a steel structure, which employs an embedded connection node structure at the outer corner column ends of a steel structure, including the following steps: Step 1: Install the pressure-bearing base 5 in the upper mounting cavity of the lower module corner post 2, and install the elastic energy dissipation mechanism 8 on the pressure-bearing base 5, and install the guide post 9 on the elastic energy dissipation mechanism 8; at the same time, install the pressure-bearing sleeve 10 in the lower mounting cavity of the upper module corner post 1. Step 2: Hoist the upper module corner post 1 as a whole above the lower module corner post 2, and slowly lower the upper module corner post 1 vertically from top to bottom to the set height above the lower module corner post 2. At the same time, align the two upper semi-rectangular slots on the upper module corner post 1 with the two lower semi-rectangular slots on the lower module corner post 2. Simultaneously, slide the conical head of the guide post 9 into the pressure-bearing cavity of the pressure sleeve 10 to complete the alignment of the upper and lower module corner posts. Step 3: Continue to lower the upper module corner post 1 until the pressure sleeve 10 forms a pressure contact with the pressure base 5 through the guide post 9. That is, the pressure sleeve 10 begins to transmit pressure to the pressure base 5 through the guide post 9, and the two upper half rectangular grooves and the two lower half rectangular grooves form two rectangular installation channels. Step 4: Insert the two shear keys 11 horizontally into the two rectangular mounting slots from the column side to complete the cross-boundary locking of the upper and lower module corner columns; as follows Figure 4 As shown, after assembly, the node structure is located within the column space of the upper module corner column 1 and the lower module corner column 2. At this time, the vertical load is transferred from the upper module corner column 1 to the bearing sleeve 10, and then from the bearing sleeve 10 to the lower module corner column 2 via the elastic energy dissipation mechanism 8. The horizontal shear force is mainly transferred and buffered through the shear key 11 and the elastic energy dissipation mechanism 8, ensuring the stability of the connection node while providing shear resistance and energy dissipation.
[0036] Step 5: Install the status sensing unit 12 on the outer side of the upper module corner column 1 and / or the outer side of the lower module corner column 2 at the target monitoring location, and conduct acceptance testing at the connection nodes.
[0037] In this invention, the specific dimensions, quantity, and material form of the guide column 9, shear key 11, and elastic energy dissipation mechanism 8 are not limited to the examples provided in this invention, and can be adapted to specific working conditions. As long as the overall technical concept does not deviate from the core concept of column end embedding, guiding, pressure bearing, shear resistance, and energy dissipation coordination of this invention, it should fall within the protection scope of this invention.
[0038] This invention provides a connection method for embedded connection nodes at the outer corner column ends of steel structures, which has the following advantages compared with the prior art: 1. This invention concentrates the guiding, pressure-bearing, shear-resistant, and energy-dissipating functions inside the column end, forming a continuous vertical force path from upper column to pressure-bearing sleeve to pressure-bearing base to lower column, as well as a horizontal shear-resistant path from upper column to shear key, elastic energy-dissipating mechanism, shear key, and lower column. The force transmission is clear and the force at the nodes is more concentrated.
[0039] 2. In this invention, the nodes are embedded inside the column end and are not exposed as sleeves or external components. They do not occupy the beam end space and do not damage the integrity of the internal decoration of the modular unit. This makes it suitable for the rapid assembly of the outer corner of column-supported modular buildings.
[0040] 3. This invention improves the fault tolerance of the upper and lower module hoisting and alignment by using the guide head and the pressure sleeve, which can reduce the difficulty of on-site installation; and forms a cross-boundary lock by using the lateral insertion shear key, which facilitates on-site post-installation and replacement.
[0041] 4. This invention improves the ductility and operational safety of the outer corner connection area by incorporating an energy-dissipating structure within the node, which can absorb some of the input energy under horizontal shear, micro-slippage, or vibration. Furthermore, combined with a state sensing unit, it enables monitoring of the node's service status. This method is simple to implement and has low implementation costs. It solves problems such as obvious node exposure, insufficient on-site assembly tolerance, insufficient concentration of vertical bearing and horizontal shear resistance paths, and insufficient energy dissipation capacity in existing connection methods. It can reliably and efficiently realize assembly operations in scenarios involving the connection of upper and lower dual modules.
Claims
1. A steel structure with an embedded connection node at the outer corner of the column end, comprising an upper module corner column (1) and a lower module corner column (2), wherein the upper module corner column (1) and the lower module corner column (2) are both square tubular structures and are distributed vertically relative to each other, the lower end of the upper module corner column (1) is provided with a lower mounting cavity, and the upper end of the lower module corner column (2) is provided with an upper mounting cavity; characterized in that, It also includes an upper L-shaped outer corner frame (3), a lower L-shaped outer corner frame (4), a pressure-bearing base (5), an elastic energy-dissipating mechanism (8), a guide column (9), a pressure-bearing sleeve (10), and a shear key (11). The upper module corner column (1) has two upper semi-rectangular grooves on the adjacent two side columns at the lower end, which are connected to the lower mounting cavity; the lower module corner column (2) has two lower semi-rectangular grooves on the adjacent two side columns at the upper end, which are connected to the upper mounting cavity, and the two lower semi-rectangular grooves and the two upper semi-rectangular grooves are distributed vertically opposite to each other to form two rectangular mounting channels. The upper L-shaped outer corner frame (3) and the lower L-shaped outer corner frame (4) are distributed opposite each other, and the upper L-shaped outer corner frame (3) is fixedly connected to the lower outer side of the upper module corner post (1), and the lower L-shaped outer corner frame (4) is fixedly connected to the upper outer side of the lower module corner post (2). The pressure-bearing base (5) is fixedly installed inside the upper mounting cavity; The lower end of the elastic energy dissipation mechanism (8) is fixedly installed on the upper end of the pressure-bearing base (5); The guide column (9) is vertically arranged, and its lower end is installed on the upper end of the elastic energy dissipation mechanism (8); The pressure-bearing sleeve (10) is fixedly installed inside the lower mounting cavity, and a pressure-bearing cavity is opened at the center of its bottom, and a sleeve relationship is formed with the upper end of the guide column (9) through the pressure-bearing cavity; The shear key (11) has a strip-shaped structure. The two shear keys (11) are horizontally inserted into the two rectangular mounting slots, and the inner end of each shear key (11) is fixedly connected to the upper end of the elastic energy dissipation mechanism (8).
2. The steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, The upper end of the shear key (11) is fixedly connected with a pair of limiting blocks (13) at intervals along the length direction. The pair of limiting blocks (13) are located on the inner and outer sides of the column wall of the upper module corner column (1). The outer end of the shear key (11) is fixedly connected with a limiting plate (14), which is used to limit the column wall of the upper module corner column (1) and the lower module corner column (2).
3. The steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, The guide post (9) has a limiting ring (15) fixedly mounted on the outer side of the middle section, and the limiting ring (15) is matched with the lower end of the pressure sleeve (10) for limiting.
4. The steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, The upper L-shaped outer corner frame (3) consists of two upper module floor beams (6) welded to the adjacent orthogonal column walls of the upper module corner column (1); the lower L-shaped outer corner frame (4) consists of two lower module ceiling beams (7) welded to the adjacent orthogonal column walls of the lower module corner column (2).
5. The steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, The top of the guide post (9) is conical, and the rest is columnar.
6. The steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, Both the upper module corner column (1) and the lower module corner column (2) are made of square steel pipe columns.
7. The steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, The pressure-bearing base (5) is installed in the upper mounting cavity by welding, nesting, or integral molding.
8. The steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, The elastic energy dissipation mechanism (8) is any one or more combinations of elastic damping components, metal energy dissipation components, and sliding energy dissipation components.
9. A steel structure outer corner column end embedded connection node structure according to claim 1, characterized in that, It also includes a state sensing unit (12), which is embedded in the column wall surface of the upper module corner post (1) and / or the lower module corner post (2) for monitoring the strain, displacement, vibration or locking status of the node.
10. A connection method for an embedded connection node at the outer corner column end of a steel structure, comprising an embedded connection node structure at the outer corner column end of a steel structure as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Step 1: Install a pressure-bearing base (5) in the upper mounting cavity of the lower module corner post (2), and install an elastic energy-dissipating mechanism (8) on the pressure-bearing base (5), and install a guide post (9) on the elastic energy-dissipating mechanism (8); at the same time, install a pressure-bearing sleeve (10) in the lower mounting cavity of the upper module corner post (1). Step 2: Hoist the upper module corner post (1) as a whole to the top of the lower module corner post (2), and slowly lower the upper module corner post (1) vertically from top to bottom to the set height above the lower module corner post (2). At the same time, align the two upper half rectangular slots on the upper module corner post (1) with the two lower half rectangular slots on the lower module corner post (2); simultaneously slide the conical head of the guide post (9) into the pressure cavity of the pressure sleeve (10) to complete the alignment of the upper and lower module corner posts. Step 3: Continue to lower the upper module corner post (1) until the pressure sleeve (10) forms a pressure contact with the pressure base (5) through the guide post (9), and the two upper half rectangular grooves and the two lower half rectangular grooves form two rectangular installation channels; Step 4: Insert two shear keys (11) horizontally from the side of the column into the two rectangular installation channels to complete the cross-boundary locking of the upper and lower module corner columns; Step 5: Install the status sensing unit (12) on the outside of the column wall of the upper module corner column (1) and / or the outside of the column wall of the lower module corner column (2) at the target monitoring position, and conduct acceptance at the connection node.