Modular steel structure building connection joint and design, construction and disassembly method thereof

Abstract

The invention discloses a modular steel structure building connecting joint and a design, construction and disassembly method thereof, which are used for connecting an upper layer module unit and a lower layer module unit or a lower layer foundation, and a frame column is a split type frame column and comprises an upper column section, a lower column section, a connecting steel plate and a column transverse locking pin shaft, the quick positioning, assembling and disassembling assembly comprises a pressure-bearing gusset plate, a conical guide column and a node transverse locking pin shaft, the pressure-bearing gusset plate is horizontally arranged and used for being connected with a lower-layer module unit or a lower-layer foundation, and the conical guide column is fixedly connected to the top face of the pressure-bearing gusset plate. The connecting joint is convenient to transport, can be quickly mounted on site, and can be reused after being dismounted.

Description

Technical Field

[0001] This invention relates to a modular steel structure building, specifically to a modular steel structure building connection node and its design, construction, and dismantling methods. Background Technology

[0002] Modular steel structure buildings represent an advanced form of industrialized construction. They involve prefabricating functional spaces in a factory into independent steel modules with complete structures and interiors, which are then transported to the site for assembly and connection, allowing buildings to be constructed like "building blocks." This construction method offers significant advantages, including improved project quality, shorter construction cycles, and reduced on-site wet work and construction waste, making it an important direction for the transformation and upgrading of the construction industry.

[0003] However, the efficiency and potential of modular buildings are largely constrained by their "final step"—the performance of the connections between on-site modular units (referred to as modules). The performance of these connections directly determines the structural safety, construction efficiency, and overall life-cycle value of the building. Currently, the on-site connection technologies commonly used in the industry mainly face the following bottlenecks and challenges:

[0004] 1. Precise positioning is difficult, resulting in slow construction efficiency. Existing bolted connections require workers to precisely align the bolt holes on the connecting plates at the base of the upper module columns with those on the connecting plates at the top of the lower module columns while operating at height. This is an extremely time-consuming and difficult process. "Slow positioning and alignment" has become a core bottleneck restricting the shortening of construction time in modular buildings.

[0005] 2. Modular buildings are constructed by stacking multiple units in three-dimensional space. Even minor installation deviations at individual nodes (such as horizontal or vertical displacement) can accumulate significantly upwards. If even a small misalignment exists in the lower modules, installing the upper modules becomes extremely difficult, and may even lead to initial stress in connecting components due to "forced placement," weakening node performance or causing visible deviations in the overall building outline, threatening structural safety and aesthetics.

[0006] 3. Permanent connection technology leads to the loss of "reversible construction" functionality. While on-site welding can create rigid nodes, it suffers from poor working conditions, high dependence on welder skills, and significant quality impact from weather. Most importantly, welding is a permanent connection, compromising the integrity of the modular unit and making the building unusable for disassembly, relocation, or flexible future modifications. This contradicts the sustainable and recyclable principles advocated by modular construction. Similarly, sleeve grouting connections are also concealed permanent connections, making their quality difficult to visually inspect. The curing of the grout requires time, affecting construction progress. Disassembly requires destruction of the node, and the modular unit cannot be reused. Summary of the Invention

[0007] One of the objectives of this invention is to provide a modular steel structure building connection node that facilitates transportation, rapid on-site installation, and reuse after disassembly.

[0008] One of the objectives of this invention is achieved through the following technical solution.

[0009] A modular steel structure building connection node is provided for connecting upper-level modular units to lower-level modular units or lower-level foundations. The connection node includes frame columns for the modular units and quick-positioning and unloading components.

[0010] The frame column is a split frame column, including an upper column section, a lower column section, a connecting steel plate, and a column transverse locking pin. The lower part of the upper column section is an upper column connecting section with an upper column connecting hole, and the upper part of the lower column section is a lower column connecting section with a lower column connecting hole. The fixing steel plate has fixing steel plate connecting holes corresponding to the positions of the upper column connecting hole and the lower column connecting hole. The upper column connecting section and the lower column connecting section are detachably connected through the fixing steel plate and the column transverse locking pin. The lower column section has a downward-opening conical inner cavity.

[0011] The rapid positioning and unloading assembly includes a pressure-bearing node plate, a tapered guide post, and a node transverse locking pin. The pressure-bearing node plate is horizontally positioned and used to connect to the lower module unit or the lower foundation. The tapered guide post is fixedly connected to the top surface of the pressure-bearing node plate. The upper part of the tapered guide post is a tapered guide section that matches the shape of the tapered inner cavity of the lower column section. The tapered guide post has a guide post locking hole. When the tapered inner cavity of the lower column section is fitted into the tapered guide post, the guide post locking hole is aligned with the lower column locking hole that transversely penetrates the tapered inner cavity of the lower column section. The node transverse locking pin passes through the lower column locking hole and the guide post locking hole, connecting the tapered guide post and the lower column section into a whole.

[0012] This invention solves the problems of high difficulty in positioning modular units, large cumulative errors, long construction time span, and lack of reversible construction functionality during on-site construction. The upper and lower column sections can be assembled by welding or produced as a single unit. They are then connected and locked to the column's transverse locking pins via fixed steel plates, forming a complete frame column for the modular unit. The frame column adopts a split design for the upper and lower column sections, achieving a rational allocation of structural functions. The fixed steel plates are made of high-strength steel to ensure the overall rigidity and strength of the joints. The transverse locking pins can be made of high-strength double-ended bolts or threaded rods. This approach separates the complex, precision-machined joint area (lower column section) from the relatively simple standard column body (upper column section), greatly facilitating specialized, mass production and quality control in the factory, and reducing overall manufacturing and transportation difficulties. The guiding fit of the "conical guide column - conical inner cavity of the frame column" transforms the complex high-altitude bolt alignment into a simple vertical insertion. It can automatically correct horizontal deviations of tens of millimeters and, through precisely defined conical fit tolerances, gives the nodes excellent "correction" capabilities. It can absorb installation deviations layer by layer, preventing errors from accumulating upwards, fundamentally ensuring the overall verticality and accuracy of the building, and preventing the generation of initial stress in the components. The transverse locking pins of the nodes can use high-strength double-ended bolts or threaded rods. All connections are dry mechanical operations, supporting the complete recycling and reuse of building modules and nodes, significantly reducing construction waste.

[0013] The connection node of the present invention also adopts the following preferred design:

[0014] In this invention, the upper column connecting section of the upper column segment is a solid structure, and the upper part of the upper column connecting section is the hollow upper column body of the upper column segment. The lower column connecting section of the lower column segment is also a solid structure. This ensures the overall rigidity and strength of the joint.

[0015] The conical guide post of the present invention includes a conical guide post body and a rubber layer. The rubber layer wraps around the outside of the conical guide post body. The rubber layer not only plays a buffering role, but also forms a tight fit with the conical inner cavity after the frame post is fully inserted, providing a certain initial stability and sealing effect before vertical locking. The guide section of the conical guide post is preferably frustum conical or frustum pyramidal.

[0016] The pressure-bearing node plate of the present invention can be connected to the underlying concrete foundation by anchor bolts.

[0017] The pressure-bearing node plate of the present invention can be fixedly connected to the top of the frame column of the lower module unit through a high-strength bolt connection pair.

[0018] The bearing node plate of the present invention is fixedly connected with one or more tapered guide columns, each tapered guide column being connected to a frame column of the upper module unit. It is applicable to various connection forms such as corner column nodes with only one frame column, side column nodes with two frame columns, and middle column nodes with four frame columns.

[0019] The second objective of this invention is to provide a design method for the aforementioned modular steel structure building connection nodes. Based on BIM technology, a building model of the connection nodes is established. Simulation analysis is performed within the overall building model based on the specific structure and dimensions of the frame columns and quick-positioning and unloading components. Stress calculations and optimizations are conducted on the guiding angle of the tapered guide column, the thickness of the bearing node plate, the specifications of the column's transverse locking pin, and the specifications of the node's transverse locking pin. Based on construction tolerances, the fit tolerance between the tapered guide column's guide section and the tapered inner cavity of the lower column section of the frame column is determined. Simultaneously, a comprehensive layout and collision check are performed on all connection hole groups and connectors in the building model, generating detailed component processing drawings, node assembly sequence, and tolerance control requirements for the connection nodes.

[0020] The third objective of this invention is to provide a construction method for the connection nodes of the aforementioned modular steel structure building, including the following steps:

[0021] S1. Prefabricate upper column section, lower column section, connecting steel plate, column transverse locking pin and quick positioning and unloading assembly, and connect the upper column section and lower column section into a frame column through the connecting steel plate and the column transverse locking pin, and assemble module units based on the frame column;

[0022] S2. Fixedly install pressure-bearing node plates on the lower foundation or lower module unit at the construction site, wherein tapered guide columns are pre-welded onto the pressure-bearing node plates according to design requirements;

[0023] S3. Hoist the upper module unit, align the conical inner cavity at the bottom of the upper module unit frame column with the guide section of the conical guide column, lower the upper module unit, and center and install the upper module unit in place by relying on the conical guide column. The locking hole of the lower column of the upper module unit frame column is aligned with the locking hole of the guide column of the conical guide column.

[0024] S4. Pass the node's lateral locking pin through the aligned lower post locking hole and the guide post locking hole, and tighten it to complete the node connection.

[0025] The design and construction of the connection nodes in this invention utilizes core components that are prefabricated with high precision in the factory, ensuring stable quality. On-site construction is simple, reducing reliance on manual labor and specific construction conditions. Although initial costs are slightly higher, the significant reduction in construction time, labor savings, and life-cycle cost reduction due to reusability make its overall benefits outstanding.

[0026] As a feasible construction method, when the transverse locking pin of the connecting node is blocked by the prefabricated wall panel of the module unit, a module disassembly and assembly port is reserved on the prefabricated wall panel at the position of the transverse locking pin of the corresponding node.

[0027] The fourth objective of this invention is to provide a method for disassembling the connection nodes of the aforementioned modular steel structure building, comprising the following steps:

[0028] D1. Loosen and remove the node lateral locking pin on the connection node to release the lateral locking between the upper module unit and the lower module unit or the lower foundation;

[0029] D2. Use jacking equipment to lift the upper module unit, so that the lower column section of the upper module unit frame column is separated from the tapered guide column;

[0030] D3. Lift the separated module unit away.

[0031] The connection node of the present invention can be disassembled without damage by "pulling out the pin and lifting", which supports the complete recycling and reuse of building modules and nodes.

[0032] The present invention has the following beneficial effects:

[0033] 1. The connection node of the present invention transforms the complex high-altitude bolt alignment into a simple vertical insertion through the guiding fit of "conical guide column - conical inner cavity of frame column". It can automatically correct horizontal deviations of tens of millimeters and shorten the installation time of a single node from hours to minutes, greatly improving the construction speed.

[0034] 2. The connection nodes of the present invention can have excellent "correction" ability through precisely defined tapered fit tolerances. They can digest installation deviations layer by layer, avoid the accumulation of errors upwards, fundamentally ensure the overall verticality and accuracy of the building, prevent the components from generating initial stress, and have strong fault tolerance.

[0035] 3. The connection node structure of the present invention is reliable and the force is clearly defined. The vertical load is directly transmitted through the solid lower column section, and the force transmission path is clear and efficient. At the same time, the horizontal locking pin of the node can form a reliable rigid connection, ensuring that the node has excellent bending resistance, shear resistance and lateral displacement resistance.

[0036] 4. The split-type frame column structure of this invention optimizes production and also considers transportation. The frame column adopts a split design of upper and lower column sections, realizing a reasonable allocation of structural functions. This separates the complex and precision-machined node areas (lower column sections) from the relatively simple standard column body (upper column sections), greatly facilitating specialized and mass production and quality control in the factory, and reducing the overall manufacturing and transportation difficulties.

[0037] 5. The connection nodes of this invention achieve fully prefabricated reversibility and are green and sustainable. All connections are dry mechanical operations, requiring no on-site welding or grouting. Installation is completed by "insertion-locking pin," and disassembly is achieved without damage by "pin removal-lifting," supporting the complete recycling and reuse of building modules and nodes, significantly reducing construction waste.

[0038] 6. The connection nodes of this invention have a high degree of prefabrication and good overall benefits. Core components are all prefabricated in the factory with high precision, ensuring stable quality. On-site construction is simple, reducing reliance on labor and construction conditions. Although the initial cost is slightly increased, the significant reduction in construction period, labor savings, and the reduction in total life-cycle cost due to reusability make its overall benefits outstanding. Attached Figure Description

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0040] Figure 1 This is a schematic diagram of the elevation structure of the connection node between the module unit and the concrete foundation in Embodiment 1. The connection node is a corner column node, and there is no need to set up module disassembly and assembly ports on the precast wall panel.

[0041] Figure 2 for Figure 1 A schematic diagram of the plan positions of the precast wall panel, frame column, and tapered guide column in the connection node. The precast wall panel does not obstruct the horizontal locking pin of the node.

[0042] Figure 3 This is a three-dimensional structural diagram of the tapered guide column applicable to the connection node of a single frame column according to the present invention;

[0043] Figure 4 This is an exploded view of the frame column structure of the present invention;

[0044] Figure 5 for Figure 4 AA section view of the main frame column;

[0045] Figure 6 This is a schematic diagram of the elevation structure of the connection node between the module unit and the concrete foundation in Embodiment 2. The connection node is a corner column node, and the module disassembly and assembly port needs to be set on the precast wall panel.

[0046] Figure 7 for Figure 6 A schematic diagram of the plan positions of the precast wall panel, frame column, and tapered guide column in the connection node, wherein the precast wall panel covers the horizontal locking pin of the node;

[0047] Figure 8 This is a schematic diagram of the elevation structure of the connection node between the module unit and the concrete foundation in Embodiment 3. The connection node is a side column node.

[0048] Figure 9 For application Figure 8 A three-dimensional schematic diagram of the tapered guide column structure at the connection node between the two frame columns;

[0049] Figure 10 This is a schematic diagram of the elevation structure of the connection node between the module unit and the concrete foundation in Example 4. The connection node is a central column node.

[0050] Figure 11 For application Figure 10 A three-dimensional schematic diagram of the tapered guide column structure connecting the four frame columns in the middle;

[0051] Figure 12 This is an exploded view of the side column connection node between the upper and lower module units in Example 5;

[0052] Figure 13 This is an exploded view of the top closed structure of the top module unit in Example 5;

[0053] Explanation of reference numerals in the attached drawings: 1. Frame column; 101. Upper column section; 1011. Upper column body; 1012. Upper column connecting section; 1013. Upper column connecting hole; 102. Lower column section; 1021. Lower column connecting hole; 1022. Lower column locking hole; 1023. Conical inner cavity; 2. Fixing steel plate; 3. Column transverse locking pin; 4. Node transverse locking pin; 5. Precast concrete floor slab; 6. Frame beam; 7. Concrete foundation; 8. Conical guide column; 81. Conical guide column body; 82. Rubber layer; 83. Guide column locking hole; 9. Precast wall panel; 10. Anchor bolt; 11. Bearing node plate; 12. Module disassembly / assembly port; 13. Profiled steel sheet ceiling; 14. High-strength bolt connection pair; 15. L-shaped connector. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of the present invention.

[0055] It should be noted that all directional indicators (such as up, down, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0056] Furthermore, the descriptions involving "first," "second," etc., in this invention are for labeling purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part of a structure. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] Example 1:

[0059] like Figure 1 and Figure 2 As shown, a modular steel structure building connection node is used to connect the upper module unit to the lower foundation. In this embodiment, the module unit has a frame column 1, which is a corner column connection node. The frame column 1 is connected to a precast concrete floor slab 5, a frame beam 6, and a precast wall panel 9 to form the module unit. The connection node includes the frame column 1 of the module unit and a quick positioning and unloading assembly.

[0060] Combination Figures 3 to 5 As shown, the frame column 1 is a split frame column, including an upper column section 101, a lower column section 102, a connecting steel plate 2, and a column transverse locking pin 3. The lower part of the upper column section 101 is an upper column connecting section 1012 with an upper column connecting hole 1013, and the upper part of the lower column section 102 is a lower column connecting section with a lower column connecting hole 1021. The fixing steel plate 2 has fixing steel plate connecting holes corresponding to the positions of the upper column connecting hole 1013 and the lower column connecting hole 1021. The upper column connecting section 1012 and the lower column connecting section are detachably connected by the fixing steel plate 2 and the column transverse locking pin 3. The lower column section 102 has a tapered inner cavity 1023 with an opening facing downward.

[0061] The rapid positioning and unloading assembly includes a pressure-bearing node plate 11, a tapered guide post 8, and a node transverse locking pin 4. The pressure-bearing node plate 11 is horizontally arranged and used to connect to the lower foundation, which is a concrete foundation 7. The pressure-bearing node plate 11 is connected to the concrete foundation 7 by anchor bolts 10. The tapered guide post 8 is fixedly connected to the top surface of the pressure-bearing node plate 11. The upper part of the tapered guide post 8 is a tapered guide section that matches the shape of the tapered inner cavity 1023 of the lower column section 102. The tapered guide post 8 has a guide post locking hole 83. When the tapered inner cavity 1023 of the lower column section 102 is fitted into the tapered guide post 8, the guide post locking hole 83 is aligned with the lower column locking hole 1022 that transversely penetrates the tapered inner cavity 1023 of the lower column section 102. The node transverse locking pin 4 passes through the lower column locking hole 1022 and the guide post locking hole 83 to connect the tapered guide post 8 and the lower column section 102 into a whole.

[0062] The upper column connecting section 1012 of the upper column section 101 is a solid structure, and the upper part of the upper column connecting section 1012 is the hollow upper column body 1011 of the upper column section 101. The lower column connecting section of the lower column section 102 is a solid structure. The upper column body 1011 and the upper column connecting section 1012 can be welded into a whole or prefabricated in a factory.

[0063] The conical guide post 8 includes a conical guide post body 81 and a rubber layer 82. The rubber layer 82 is wrapped around the outside of the conical guide post body 81. The rubber layer 82 not only plays a buffering role, but also forms a tight fit with the conical inner cavity 1023 after the frame post 1 is fully inserted, providing a certain initial stability and sealing effect before vertical locking. The guide section of the conical guide post 8 is preferably frustum conical or frustum pyramidal.

[0064] See Figure 2 In this embodiment, the column transverse locking pin 3 and the node transverse locking pin 4 can be made of high-strength double-ended bolts or screws. The precast wall panel 9 does not cover the node transverse locking pin 4, so the installation and disassembly space of the node transverse locking pin 4 is not limited. The operator can directly pass the node transverse locking pin 4 through the lower column locking hole 1022 and the guide column locking hole 83 from the side, and tighten the nut with a torque wrench to form a rigid node.

[0065] Example 2:

[0066] like Figure 6 and Figure 7 As shown, the difference between this embodiment and embodiment one is that the prefabricated wall panel 9 is thick, which obstructs the horizontal locking pin 4 of the node. The space for installing and removing the horizontal locking pin 4 of the node is limited. A module disassembly port 12 is pre-opened on the prefabricated wall panel 9. During installation and disassembly, the operator can install and remove the horizontal locking pin 4 of the node through this module disassembly port 12. After the construction is completed, the module disassembly port 12 can be sealed with a decorative cover plate.

[0067] Example 3:

[0068] like Figure 8 and Figure 9 As shown, the difference between this embodiment and Embodiments 1 and 2 is that the upper layer of this embodiment has two modular units with two frame columns 1, which are side column connection nodes. Each frame column 1 is connected to a precast concrete floor slab 5 and a frame beam 6 to form a modular unit. The bearing node plate 11 at the connection node is provided with two tapered guide columns 8, which are respectively connected to the two frame columns 1 of the upper layer. The node connection is completed by using a long node transverse locking pin 4 that passes through the lower column locking hole 1022 of the two frame columns 1 and the guide column locking hole 83 of the two tapered guide columns 8.

[0069] Example 4:

[0070] like Figure 10 and Figure 11 As shown, this embodiment differs from Embodiments 1 and 2 in that the upper layer of this embodiment has four modular units, with four frame columns 1 serving as central column connection nodes. Each frame column 1 is connected to a precast concrete floor slab 5 and a frame beam 6 to form a modular unit. Four tapered guide columns 8 are provided on the bearing node plate 11 at the connection node, corresponding to the four upper frame columns 1. Each tapered guide column 8 has two vertically distributed and mutually perpendicular guide column locking holes 83. Four horizontal locking pins 4 are used to connect the lower column locking holes 1022 of two adjacent frame columns 1 and the guide column locking holes 83 of the tapered guide columns 8. The four horizontal locking pins 4 form a stacked "U"-shaped distribution, thereby rigidly connecting the four modular units. This solution fully demonstrates the excellent adaptability of the nodes of this invention in complex three-dimensional connections.

[0071] Example 5:

[0072] like Figure 12 As shown, this embodiment is a connection node between module units. Taking the side column connection node with two frame columns 1 as an example, the pressure-bearing node plate 11 is fixedly connected to the top of the frame column 1 of the lower module unit through the high-strength bolt connection pair 14. Specifically, the top of the lower module unit is provided with a frame beam 6 and a profiled steel plate ceiling 13. L-shaped connectors 15 are pre-welded on the frame beams 6 of the two lower module units. The pressure-bearing node plate 11 is firmly connected to the L-shaped connectors 15 through the high-strength bolt connection pair 14. Two tapered guide columns 8 are fixedly provided on the pressure-bearing node plate 11. The two upper module units have two frame columns 1. The tapered inner cavity 1023 of the lower column section 102 of the two frame columns 1 is respectively fitted on the two tapered guide columns 8. The lower column section 102 and the tapered guide columns 8 of the frame column 1 are connected into a whole by a horizontal locking pin 4 at a node to achieve structural locking. Its connection principle is the same as that of the side column connection node in Embodiment 3. Similarly, the corner column connection nodes between module units can be connected with reference to Embodiment 1 or Embodiment 2, and the middle column connection nodes between module units can be connected with reference to Embodiment 4.

[0073] For top-level module units, such as Figure 13 As shown, since no new module units need to be connected above the top module unit, there is no need to install tapered guide columns 8 above it. It only needs to be sealed and fixed by bearing node plates 11 and high-strength bolt connections, and the waterproofing and sealing treatment of the roof is completed in the final stage of construction.

[0074] In the above embodiments of the present invention, when the building function requires it, each pressure-bearing node plate 11 can be designed as concave or with reserved slots to reserve passage space for external drainage pipes and other facilities.

[0075] The connection nodes in the above embodiments of the present invention employ the following design method: A building model of the connection node is established based on BIM technology. Simulation analysis is performed in the overall building model based on the specific structure and dimensions of the frame columns and quick-positioning and unloading components. Stress calculations and optimizations are conducted on the guiding angle of the tapered guide column, the thickness of the bearing node plate, the specifications of the column's transverse locking pin, and the specifications of the node's transverse locking pin. Based on construction tolerances, the fit tolerance between the tapered guide column's guide section and the tapered inner cavity of the lower column section of the frame column is determined. Simultaneously, a comprehensive layout and collision check are performed on all connection hole groups and connectors in the building model, generating detailed component processing drawings, node assembly sequence, and tolerance control requirements for the connection node.

[0076] The connection node of the above embodiments of the present invention adopts the following construction method, including the following steps:

[0077] S1. Prefabricate the upper column section 101, lower column section 102, connecting steel plate 2, column transverse locking pin 3 and quick positioning and unloading components, and connect the upper column section 101 and lower column section 102 to form a frame column 1 through the connecting steel plate 2 and column transverse locking pin 3, and assemble the module unit based on the frame column 1.

[0078] S2. The pressure-bearing node plate 11 is fixedly installed on the lower foundation or lower module unit at the construction site. The tapered guide column 8 is pre-welded on the pressure-bearing node plate 11 according to the design requirements. Generally, the tapered guide column 8 is welded in the center area of ​​the top surface of the pressure-bearing node plate 11.

[0079] S3. Hoist the upper module unit, align the tapered inner cavity 1023 of the lower part of the upper module unit frame column 1 with the guide section of the tapered guide column 8, lower the upper module unit, and center and install the upper module unit in place by relying on the tapered guide column 8. The lower column locking hole 1022 of the upper module unit frame column 1 is aligned with the guide column locking hole 83 of the tapered guide column 8.

[0080] S4. Pass the node transverse locking pin 4 through the aligned lower column locking hole 1022 and guide column locking hole 83, and tighten it to complete the node connection.

[0081] The module unit and the underlying foundation, as well as the module units themselves, are connected using bearing node plates 11, tapered guide posts 8, tapered inner cavities 1023, and transverse locking pins 4 to achieve rapid installation of the connection nodes. After the construction of each connection node is completed, the tightening torque of all transverse locking pins is checked in sequence, and the installation accuracy of the entire module is measured to ensure that its horizontality and verticality meet the requirements.

[0082] The design and construction of the connection nodes in this invention utilizes high-precision prefabrication of core components in a factory, ensuring stable quality. In the factory, the upper column segment 101 and the lower column segment 102 are first machined to ensure the machining accuracy of the dimensions of holes such as the upper column connection hole 1013, the lower column connection hole 1021, and the lower column locking hole 1022. The upper and lower column segments are then connected by a fixing steel plate 2 and a transverse locking pin 3 to form a complete frame column 1. Subsequently, beams, slabs, and other components are assembled to form complete modular steel structure units, which are then numbered. Quick-positioning and unloading components are produced and pre-assembled and verified in the factory. After verification, the components are disassembled, individually numbered, and packaged, simplifying on-site construction and reducing reliance on manual labor and construction conditions. Although the initial cost of this invention is slightly increased, the significant reduction in construction time, labor savings, and the reduction in total life-cycle cost due to reusability make its overall benefits outstanding.

[0083] The connection node in the above embodiments of the present invention employs the following disassembly method, including the following steps:

[0084] D1. Loosen and remove the node lateral locking pin 4 on the connecting node to release the lateral locking between the upper module unit and the lower module unit or the lower foundation;

[0085] D2. Use a lifting device to lift the upper module unit, so that the lower column section 102 of the upper module unit frame column 1 is separated from the tapered guide column 8;

[0086] D3. Lift the separated module unit away.

[0087] The connection node of the present invention can be disassembled without damage by "pulling out the pin and lifting", which supports the complete recycling and reuse of building modules and nodes.

[0088] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A modular steel construction building connection joint for the connection of an upper modular unit to a lower modular unit or to a lower foundation, characterized in that, The connecting node comprises a frame column of a module unit and a quick positioning and dismounting assembly, wherein The frame column is a split frame column, comprising an upper column segment, a lower column segment, a connecting steel plate and a column transverse locking pin shaft, the lower part of the upper column segment is an upper column connecting segment with an upper column connecting hole, the upper part of the lower column segment is a lower column connecting segment with a lower column connecting hole, the connecting steel plate is provided with a connecting hole corresponding to the upper column connecting hole and the lower column connecting hole, the upper column connecting segment and the lower column connecting segment are detachably connected through the connecting steel plate and the column transverse locking pin shaft, and the lower column segment is provided with a tapered inner cavity opening downward. The quick positioning and dismounting assembly comprises a pressure bearing node plate, a tapered guide column and a node transverse locking pin shaft, the pressure bearing node plate is horizontally arranged and used for connecting a lower layer module unit or a lower layer foundation, the tapered guide column is fixedly connected to the top surface of the pressure bearing node plate, the upper part of the tapered guide column is a tapered guide segment matched with the tapered inner cavity of the lower column segment, the tapered guide column is provided with a guide locking hole, when the tapered inner cavity of the lower column segment is sleeved on the tapered guide column, the guide locking hole is aligned with a lower column locking hole transversely penetrating through the tapered inner cavity of the lower column segment, and the node transverse locking pin shaft penetrates through the lower column locking hole and the guide locking hole, so that the tapered guide column and the lower column segment are connected as a whole.

2. The modular steel building connection node of claim 1, wherein: The upper column connecting segment of the upper column segment is a solid structure, and the upper part of the upper column connecting segment is a hollow upper column body of the upper column segment.

3. The modular steel building connection node of claim 1, wherein: The tapered guide column comprises a tapered guide column main body and a rubber layer, the rubber layer is wrapped outside the tapered guide column main body, and the guide segment of the tapered guide column is a circular truncated cone or a prismatic truncated pyramid.

4. The modular steel building connection node of claim 1, wherein: The pressure bearing node plate is connected to a lower layer concrete foundation through an anchor bolt.

5. The modular steel building connection node of claim 1, wherein: The pressure bearing node plate is fixedly connected to the top of the frame column of a lower layer module unit through a high-strength bolt connection pair.

6. The modular steel building connection node of claim 1, wherein: One or more than one tapered guide column is fixedly connected to the pressure bearing node plate, and each tapered guide column is connected to one frame column of an upper layer module unit.

7. A method of designing a connection joint of a modular steel building structure according to any one of claims 1 to 6, characterized in that, The method comprises the steps of: establishing a building model of the connecting node based on BIM technology, performing simulation analysis in the overall building model based on the specific structure and size of the frame column and the quick positioning and dismounting assembly, performing stress calculation and optimization on the guide angle of the tapered guide column, the thickness of the pressure bearing node plate, the specification of the column transverse locking pin shaft and the specification of the node transverse locking pin shaft, determining the matching tolerance between the guide segment of the tapered guide column and the tapered inner cavity of the lower column segment of the frame column based on the construction allowable error, and simultaneously performing comprehensive layout and collision checking on all connecting hole groups and connecting pieces in the building model to generate component processing detail drawings, node assembly sequence and tolerance control requirements of the connecting node.

8. A method of constructing a modular steel building connection node according to any one of claims 1 to 6, wherein, The method comprises the steps of: S1. prefabricating an upper column segment, a lower column segment, a connecting steel plate, a column transverse locking pin shaft and a quick positioning and dismounting assembly, and connecting the upper column segment and the lower column segment into a frame column through the connecting steel plate and the column transverse locking pin shaft, and assembling a module unit based on the frame column; S2. Fixing and installing a pressure node plate on the lower foundation or lower module unit at the construction site, and pre-welding a conical guide column on the pressure node plate according to design requirements; S3. Hoisting the upper module unit, aligning the conical inner cavity at the lower part of the frame column of the upper module unit with the guide section of the conical guide column, lowering the upper module unit, and relying on the conical guide column to center and install the upper module unit in place, and aligning the lower column locking hole of the frame column of the upper module unit with the guide column locking hole of the conical guide column; S4. Passing the node transverse locking pin shaft through the aligned lower column locking hole and guide column locking hole, and fastening, to complete the node connection.

9. The method of constructing a modular steel building connection joint of claim 8, wherein: When the node transverse locking pin shaft of the connection node is blocked by the prefabricated wall panel of the module unit, a module disassembly opening is reserved on the prefabricated wall panel at a position corresponding to the node transverse locking pin shaft.

10. A method of disassembly of a modular steel building connection node according to any one of claims 1 to 6, characterized in that, The method comprises the steps of: D1. Loosening and removing the node transverse locking pin shaft on the connection node, and releasing the transverse locking of the upper module unit with the lower module unit or the lower foundation; D2. Using a jacking device to jack up the upper module unit, so that the lower column section of the frame column of the upper module unit is separated from the conical guide column; D3. Hoisting the separated module unit away.

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