Split beam-column joint of fabricated steel structure and system thereof

Abstract

The application discloses a split beam-column joint of fabricated steel structure and a system thereof, which comprises a column section, a connecting piece and a cross beam, the column section comprises a steel structure column, upper and lower end connecting interfaces and a beam interface, the connecting piece comprises a steel structure column, a gasket and a steel member, the cross beam is an I-shaped steel beam with bolt through holes arranged at two ends, and each part is connected through full bolt cooperation to achieve simple assembly relationship, standardization and convenient operation, and construction efficiency is improved. The connecting point position of the beam and the column is separated, the connection of the beam-column joint is changed from a single node into a double node, the stress of the connecting node is dispersed, and the strength, the rigidity and the stability of the connecting node are enhanced.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated steel structure construction technology, specifically a separate beam-column joint and its system for prefabricated steel structures. Background Technology

[0002] Currently, my country is vigorously promoting green and environmentally friendly prefabricated buildings. Prefabricated steel structures are an important component of prefabricated buildings, and their advantages of short construction period and high construction efficiency are unmatched by traditional construction technologies. Therefore, the connection nodes of prefabricated steel structures are particularly important, as their performance directly affects the strength, stiffness, and stability of the steel structure system. However, currently, steel structure connection nodes in my country are mainly assembled and fixed to beams and columns through welding. Welding has certain errors and defects, and the requirements for weld quality and construction technology are very strict. Quality is not easy to control, which can easily affect the mechanical properties of the nodes. Moreover, beam-column nodes are usually concentrated in one location, resulting in a relatively complex stress situation. For large-span buildings, high-rise buildings, and buildings that are greatly affected by geographical conditions such as earthquakes and typhoons, the existing forms of prefabricated steel structures still have significant problems.

[0003] Traditionally, there are two methods for welding steel columns and beams on site: one is to use full penetration welds; the other is to use double-sided fillet welds or K-groove welds. These connection methods are slow to construct, and the weld quality is difficult to guarantee, which can easily lead to errors and defects, thus affecting the mechanical properties of the joint.

[0004] Therefore, different methods for connecting beam-column joints in prefabricated steel structures have emerged in the existing technology. The main connection methods are as follows:

[0005] Prior art 1: A beam-column joint for a prefabricated steel structure with an inner insert plate and square steel pipe column clamping plate, disclosed in Chinese invention patent application CN110359555A, published on October 22, 2019, includes: a lower column template, an upper column template, a beam module, and a clamping plate. This invention discloses a beam-column joint for a prefabricated steel structure with an inner insert plate and square steel pipe column clamping plate, including a lower column module, an upper column module, a beam module, and a clamping plate. The lower column module consists of a lower column, a ribbed support plate, an inner insert plate, and stiffening ribs, all welded in the factory. The upper column module consists of an upper column and a ribbed support plate, all welded in the factory. The beam module consists of an H-shaped steel beam and stiffening ribs, all welded in the factory. Holes are pre-drilled in the upper column, H-shaped steel beam, inner insert plate, ribbed support plate, and clamping plate, and the components are transported to the site for full bolt assembly.

[0006] Prior Art 2: The prefabricated steel structure beam-column joint structure disclosed in Chinese invention patent application CN214784820U, with a publication date of November 19, 2021, includes: a steel structure column, multiple base plates installed on the side of the steel structure column, and I-beams mounted on each of the base plates. Each base plate is provided with fixing bolts for connecting to the steel structure column. Each base plate is provided with two support plates, and a gap is provided between the two support plates for the I-beams to pass through. Multiple bolts are installed between the web of the I-beams and the two support plates.

[0007] Of the aforementioned prior art, while prior art one achieves full bolt assembly on-site, many complex components still require pre-welding, which can easily lead to errors and defects, resulting in repetitive on-site installation work and wasting time. Prior art one and prior art two achieve the fixed installation of I-beams on steel structure columns without requiring additional on-site welding work, but the forces of the upper column, lower column, and beam in the joint structure are concentrated in one location, resulting in complex stress conditions that can easily affect the mechanical properties of the connection joint.

[0008] Therefore, the primary technical problem to be solved is how to connect prefabricated steel structure beam-column joints simply, accurately, quickly and conveniently, and how to enhance the strength, stiffness and stability of prefabricated steel structure beam-column joints. Summary of the Invention

[0009] To address the shortcomings of the aforementioned background technology, this invention proposes a separate beam-column joint and its system for prefabricated steel structures, which solves the technical problems of existing steel structure joints having a single stress point, affecting mechanical performance, low construction efficiency, and being prone to errors and defects during construction.

[0010] The technical solution of this invention is as follows:

[0011] A prefabricated steel structure beam-column joint using separate node connections includes vertical nodes and horizontal nodes. The height of the horizontal nodes is lower than that of the vertical nodes. The vertical nodes include an upper column segment and a lower column segment connected by connectors. The horizontal nodes include a lower column segment and a beam connected by connectors.

[0012] Furthermore, the upper column section, lower column section, connecting parts and crossbeam are all bolted together, and only workers need to assemble them on the construction site.

[0013] Furthermore, the connector is connected to the upper column section via a bolted connection structure. The bolted connection structure includes a box-shaped core inserted between the upper and lower column sections. The box-shaped core is fitted and attached to the inner walls of the upper and lower column sections. A pad is provided on the outer periphery of the box-shaped core. A flange interface corresponding to the pad is provided at the lower end of the upper column section. The pad and the flange interface are connected by a set of vertical bolts.

[0014] Furthermore, the bolt connection structure one also includes an auxiliary bolt group one connected between the box-shaped cylindrical core and the upper column section. The auxiliary bolt group one passes through the overlapping part of the box-shaped cylindrical core and the upper column section, and the flange interface of the upper column section is provided with stiffening ribs.

[0015] Furthermore, the connector is connected to the lower column section via a second bolt connection structure. The second bolt connection structure includes a horizontal stiffening rib at the upper end of the lower column section. The horizontal stiffening rib is connected to the pad and flange interface via a first set of vertical bolts. A positioning slot is provided on the side wall at the upper end of the lower column section. A vertical stiffening rib is provided between the horizontal stiffening rib and the outer side wall of the lower column section. The pad is connected to a side steel member that engages with the positioning slot. The side steel member is connected to the vertical stiffening rib via a set of transverse bolts.

[0016] Furthermore, the second bolt connection structure also includes a second auxiliary bolt group connected between the box-shaped core and the lower column section, the second auxiliary bolt group passing through the overlapping part of the box-shaped core and the lower column section.

[0017] Furthermore, the side steel component includes a first concave plate and a second concave plate arranged opposite to each other. The first concave plate and the second concave plate are arranged in parallel and the distance between their outer surfaces is the same as the width of the positioning groove. A connecting plate is provided between the first concave plate and the second concave plate. The inner wall of the connecting plate is fitted with the outer wall of the box-shaped core, and a strip-shaped stiffening rib is provided on the outer wall to support the first concave plate and the second concave plate. The top end of the connecting plate is attached to a pad, and the bottom end is fitted with the positioning groove. The first concave plate, the second concave plate, and the positioning groove are all the same length.

[0018] Furthermore, a base plate is provided between the bottom ends of the first concave plate and the second concave plate, a support platform is provided on the lower column section, and stiffening ribs are provided below the support platform. A crossbeam connects the support platform and the base plate. The upper flange of the crossbeam is connected to the base plate by a group of vertical bolts (group 2), and the lower flange of the crossbeam is connected to the support platform by a group of vertical bolts (group 3).

[0019] A prefabricated steel structure system includes the aforementioned prefabricated steel structure with separate beam-column joints and the following steps:

[0020] Step 1: Fix the foundation column segment. There are two fixing methods: The first is to pre-embed bolts in the concrete foundation. After the concrete solidifies, the foundation column segment is fixed to the foundation column segment through the bolts in the concrete foundation. The second is to place the foundation column segment directly on the foundation before pouring the foundation concrete. It is poured together with the steel reinforcement and other components in the foundation. The foundation column segment is fixed after the concrete solidifies.

[0021] Step 2: After installing the lower column section on the foundation section, install the bearing platform on the lower column section, lift the crossbeam, and when the lower flange of the crossbeam and the bearing platform are lifted to the same horizontal height, move the crossbeam horizontally to fit the lower flange of the crossbeam with the bearing platform, and fix it with the vertical bolt group 2;

[0022] Step 3: Lift the connector to the top of the lower column section and slowly lower it vertically so that the side steel component on the connector is inserted into the positioning slot of the lower column section. Continue to lower it until the side steel component is completely embedded in the positioning slot, the concave plate is attached to the vertical stiffening rib and fixed by the horizontal bolt group, and the bottom plate is attached to the upper flange of the crossbeam and fixed by the vertical bolt group.

[0023] Step 4: Lift the upper column section to be connected, hoist it directly above the connector, and lower it vertically until the box-shaped core of the connector is inserted into the upper column section, the surface of the box-shaped core is in contact with the inner surface of the column section, the flange interface of the upper column section, the gasket of the connector and the horizontal stiffening rib of the lower column section are in contact, and they are fixed together by vertical bolts.

[0024] Step 5: Repeat steps 1 to 4 for installation on the same floor until the installation of one layer of steel structure is completed. Then repeat steps 2 to 4 for installation layer by layer until the installation of the top layer is completed.

[0025] The specific beneficial effects of this invention include:

[0026] 1. The prefabricated steel structure beam-column joint with separate node connection described in this invention separates the connection points of the column and the beam. The upper column segment and the lower column segment are connected by a vertical node, and the lower column segment and the beam are connected by a horizontal node. The horizontal node is located below the vertical node. The connection of the beam-column joint is transformed from a single node to a double node, which not only ensures the firmness between the beam and the column, but also strengthens the connection between the columns, disperses the stress on the connection node, and eliminates the need to set multiple connection nodes in the same position, thereby enhancing the strength, stiffness and stability of the connection node.

[0027] 2. The prefabricated steel structure beam-column joint and system described in this invention simplifies and standardizes the parts that need to be assembled. On the construction site, only workers need to perform full bolt assembly, which avoids errors and defects caused by welding, effectively standardizes the assembly relationship, is easy to operate, greatly speeds up the construction progress, and improves the efficiency of the building construction process. It provides a new option for some projects that need to be completed quickly and has a wide range of applications. Attached Figure Description

[0028] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional schematic diagram of the beam-column joint of a prefabricated steel structure.

[0030] Figure 2 This is a front view of the beam-column joint of a prefabricated steel structure.

[0031] Figure 3 This is an exploded view of the beam-column joints of a prefabricated steel structure.

[0032] Figure 4 This is a top view of the beam-column joint connector of a prefabricated steel structure.

[0033] Figure 5 This is a side view of the beam-column joint connector in a prefabricated steel structure.

[0034] Figure 6 This is a bottom view of the beam-column joint connector of a prefabricated steel structure.

[0035] Figure 7 This is a schematic diagram of a prefabricated steel structure system.

[0036] Explanation of icon numbers:

[0037] 1. Upper column section; 2. Lower column section; 3. Connecting parts; 4. Crossbeam;

[0038] 11. Flange interface; 12. Stiffening ribs;

[0039] 22. Positioning groove; 23. Vertical stiffening rib; 24. Horizontal stiffening rib;

[0040] 31. Box-shaped core; 32. Pad plate; 33. Side steel components; 34. Strip stiffening ribs; 35. Base plate; 36. Concave plate one; 37. Concave plate two; 38. Connecting plate;

[0041] 51. Foundation; 52. Foundation stiffening ribs;

[0042] 62. Vertical bolt group one;

[0043] 72. Auxiliary bolt group one; 74. Auxiliary bolt group two;

[0044] 82. Horizontal bolt group;

[0045] 92. Vertical bolt group two; 94. Vertical bolt group three. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] A separated beam-column joint for prefabricated steel structures includes vertical and horizontal joints. The height of the horizontal joint is lower than that of the vertical joint. The vertical joint includes an upper column segment 1 and a lower column segment 2 connected by a connector 3. The horizontal joint includes a lower column segment 3 and a beam 4 connected by a connector 3. This technical solution separates the connection points of the column and the beam, transforming the beam-column joint connection from a single node to a double node. This ensures the robustness between the beam and column, strengthens the connection between columns, distributes the stress on the connection nodes, and eliminates the need for multiple connection nodes at the same location, thus enhancing the strength, stiffness, and stability of the connection nodes. In existing joint technologies described in the background art, the forces of the upper column, lower column, and beam are concentrated at one location, resulting in complex stress conditions and significantly impacting the mechanical properties of the connection nodes.

[0048] As a preferred embodiment of the separated beam-column joint in prefabricated steel structure, the connector 3 is bolted to the upper column segment 1, the lower column segment 2, and the crossbeam 4, and can be assembled by workers on site.

[0049] As a preferred embodiment of the separated beam-column joint in a prefabricated steel structure, the connector 3 is connected to the upper column segment 1 by a bolt connection structure. The bolt connection structure includes a box-shaped core 31 inserted between the upper column segment 1 and the lower column segment 2. The box-shaped core 31 is preferably a hollow rectangle or polygon, fitted and attached to the inner wall of the upper column segment 1 and the lower column segment 2. The box-shaped core 31 has the same shape as the upper column segment 1 and the lower column segment 2. A welded or cast-in-place pad 32 is provided at the upper part of the outer periphery of the box-shaped core 31. A flange interface 11 corresponding to the pad 32 is provided at the lower end of the upper column segment 1. The pad 32 and the flange interface 11 are connected by a vertical bolt group 62. The increased number of bolts in the vertical bolt group 62 can effectively enhance the stability between the upper column segment and the connector.

[0050] As a preferred embodiment of the separated beam-column joint in a prefabricated steel structure, the bolted connection structure further includes an auxiliary bolt group 72 connecting the box-shaped core 31 and the upper column section 1. The auxiliary bolt group 72 passes through the overlapping portion of the box-shaped core 31 and the upper column section 1. The auxiliary bolt group 72 can be set on two or more opposite sides of the box-shaped core 31, which can also effectively enhance the stability between the upper column section 1 and the connecting member 3. The stiffening ribs 12 provided around the lower interface of the upper column section 1 also serve to strengthen the flange interface 11. The increase in the number of stiffening ribs 12 increases the firmness between the flange interface 11 and the upper column section 1.

[0051] In a preferred embodiment of a split beam-column joint in a prefabricated steel structure, the connector 3 is connected to the lower column segment 2 via a bolted connection structure two. The bolted connection structure two includes a horizontal stiffening rib 24 at the upper end of the lower column segment. The horizontal stiffening rib 24 is connected to a pad 32 and a flange interface 11 via a vertical bolt group 62. A positioning slot 22 is provided on the side wall at the upper end of the lower column segment 2. Vertical stiffening ribs 23 are provided between the horizontal stiffening rib 24 and the outer side wall of the lower column segment 2. The increased number of vertical stiffening ribs 23 further stabilizes the joint. The pad 32 is connected to a side steel member 33 that engages with the positioning slot 22. The side steel member 33 is connected to the vertical stiffening rib 23 via a transverse bolt group 82.

[0052] As a preferred embodiment of the separated beam-column joint in a prefabricated steel structure, the bolted connection structure two further includes an auxiliary bolt group two 74 connecting the box-shaped core 31 and the lower column section 2. The auxiliary bolt group two 74 can be set on two or more opposite sides of the box-shaped core 31. The additional auxiliary bolt group two 74 passes through the overlapping part of the box-shaped core 31 and the lower column section 2, effectively strengthening the connection between the lower column section 2 and the connector 3. The increased number of bolts in the auxiliary bolt group two 74 can effectively enhance the stability between the lower column section and the connector.

[0053] As a preferred embodiment of the separated beam-column joint in a prefabricated steel structure, the side steel member 33 includes a first concave plate 36 and a second concave plate 37 arranged opposite each other on the left and right sides. The first concave plate 36 and the second concave plate 37 are arranged in parallel and the distance between their outer surfaces is the same as the width of the positioning slot 22. A connecting plate 38 is provided between the first concave plate 36 and the second concave plate 37. The inner wall of the connecting plate 38 is fitted with the outer wall of the box-shaped core 31, and the outer wall is provided with one or more strip-shaped stiffening ribs 34 supporting the first concave plate 36 and the second concave plate 37. The one or more strip-shaped stiffening ribs 34 are evenly distributed on the connecting plate 38. The increase in the number can effectively strengthen the strength of the side steel member 33. The top end of the connecting plate 38 is connected to the pad 32, and the bottom end is fitted with the positioning slot 22. The first concave plate 36, the second concave plate 37, and the positioning slot 22 are all the same length in order to better fit the connection relationship between the nodes.

[0054] As a preferred embodiment of the separated beam-column joint in a prefabricated steel structure, a base plate 35 is provided between the bottom ends of the concave plate 36 and the concave plate 37 for connecting the upper flange of the crossbeam. A bearing platform 51 is provided on the lower column section 2 for connecting the lower flange of the crossbeam. A bearing platform stiffening rib 52 is provided below the bearing platform 51. Increasing the number of bearing platform stiffening ribs 52 will also enhance the tensile and bending resistance of the bearing platform 51. A crossbeam 4 is connected between the bearing platform 51 and the base plate 35. The crossbeam 4 is an I-beam. The upper flange of the crossbeam 4 is connected to the base plate 35 by vertical bolt group 2 92, and the lower flange of the crossbeam 4 is connected to the bearing platform 51 by vertical bolt group 3 94. Increasing the number of bolts in vertical bolt group 2 92 and vertical bolt group 3 94 can effectively enhance the firmness of the connection between the crossbeam 4 and the lower column section 2.

[0055] A prefabricated steel structure system includes the aforementioned prefabricated steel structure with separate beam-column joints and the following steps:

[0056] Step 1: Fix the foundation column segment. There are two fixing methods: The first is to pre-embed bolts in the concrete foundation. After the concrete solidifies, the foundation column segment is fixed to the foundation column segment through the bolts in the concrete foundation. The second is to place the foundation column segment directly on the foundation before pouring the foundation concrete. It is poured together with the steel reinforcement and other components in the foundation. The foundation column segment is fixed after the concrete solidifies.

[0057] Step 2: After installing the lower column section on the foundation section, install the bearing platform on the lower column section, lift the crossbeam, and when the lower flange of the crossbeam and the bearing platform are lifted to the same horizontal height, move the crossbeam horizontally to fit the lower flange of the crossbeam with the bearing platform, and fix it with the vertical bolt group 2;

[0058] Step 3: Lift the connector to the top of the lower column section and slowly lower it vertically so that the side steel component on the connector is inserted into the positioning slot of the lower column section. Continue to lower it until the side steel component is completely embedded in the positioning slot, the concave plate is attached to the vertical stiffening rib and fixed by the horizontal bolt group, and the bottom plate is attached to the upper flange of the crossbeam and fixed by the vertical bolt group.

[0059] Step 4: Lift the upper column section to be connected, hoist it directly above the connector, and lower it vertically until the box-shaped core of the connector is inserted into the upper column section, the surface of the box-shaped core is in contact with the inner surface of the column section, the flange interface of the upper column section, the gasket of the connector and the horizontal stiffening rib of the lower column section are in contact, and they are fixed together by vertical bolts.

[0060] Step 5: After completing the installation of one layer of steel structure by repeating steps 1 to 4, repeat steps 2 to 4 to install layer by layer until the installation of the top layer is completed. The top column segment only has the lower end connection.

[0061] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0062] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A separated beam-column joint for prefabricated steel structures, characterized in that: It includes vertical nodes and horizontal nodes, the height of the horizontal nodes is lower than the height of the vertical nodes, the vertical nodes include an upper column segment (1) and a lower column segment (2) connected by a connector (3), and the horizontal nodes include a lower column segment (2) and a crossbeam (4) connected by a connector (3). The connector (3) is connected to the upper column section (1) by a bolt connection structure. The bolt connection structure includes a box-shaped core (31) inserted between the upper column section (1) and the lower column section (2). The box-shaped core (31) is fitted and attached to the inner wall of the upper column section (1) and the lower column section (2). A pad (32) is provided on the outer periphery of the box-shaped core (31). A flange interface (11) corresponding to the pad (32) is provided at the lower end of the upper column section (1). The pad (32) and the flange interface (11) are connected by a vertical bolt group (62). The connector (3) is connected to the lower column section (2) by a bolt connection structure two. The bolt connection structure two includes a horizontal stiffening rib (24) provided at the upper end of the lower column section (2). The horizontal stiffening rib (24) is connected to the pad (32) and the flange interface (11) by a vertical bolt group one (62). A positioning slot (22) is provided on the side wall at the upper end of the lower column section (2). A vertical stiffening rib (23) is provided between the horizontal stiffening rib (24) and the outer side wall of the lower column section (2). The pad (32) is connected to a side steel member (33) that is inserted into the positioning slot (22). The side steel member (33) is connected to the vertical stiffening rib (23) by a horizontal bolt group (82). The side steel member (33) has the same width as the positioning slot (22). The top of the side steel member (33) is connected to the pad (32), and the bottom is fitted to the positioning slot (22). The lower column section (2) is provided with a support platform (51). The support platform (51) and the bottom plate (35) of the side steel member (33) are used to connect the crossbeam (4). A stiffening rib (52) is provided below the support platform (51).

2. The separated beam-column joint of the prefabricated steel structure according to claim 1, characterized in that: The connector (3) is bolted to the upper column section (1), to the lower column section (2), and to the crossbeam (4).

3. The separated beam-column joint of the prefabricated steel structure according to claim 1 or 2, characterized in that: The bolt connection structure also includes an auxiliary bolt group (72) connecting the box-shaped core (31) and the upper column section (1). The auxiliary bolt group (72) passes through the overlapping part of the box-shaped core (31) and the upper column section (1). The flange interface (11) of the upper column section (1) is provided with stiffening ribs (12).

4. The separated beam-column joint of the prefabricated steel structure according to claim 1 or 2, characterized in that: The second bolt connection structure also includes an auxiliary bolt group two (74) connected between the box-shaped core (31) and the lower column section (2), and the auxiliary bolt group two (74) passes through the overlapping part of the box-shaped core (31) and the lower column section (2).

5. The separated beam-column joint of the prefabricated steel structure according to claim 1 or 2, characterized in that: The side steel component (33) includes a concave plate one (36) and a concave plate two (37) arranged opposite to each other. The concave plate one (36) and the concave plate two (37) are arranged in parallel and the distance between their outer surfaces is the same as the width of the positioning slot (22). A connecting plate (38) is provided between the concave plate one (36) and the concave plate two (37). The inner wall of the connecting plate (38) is fitted with the outer wall of the box-shaped core (31), and a strip-shaped stiffening rib (34) is provided on the outer wall to support the concave plate one (36) and the concave plate two (37). The top end of the connecting plate (38) is connected to the pad plate (32), and the bottom end is fitted with the positioning slot (22). The lengths of the concave plate one (36), the concave plate two (37), and the positioning slot (22) are all the same.

6. The separated beam-column joint of the prefabricated steel structure according to claim 5, characterized in that: A base plate (35) is provided between the bottom ends of the concave plate one (36) and the concave plate two (37). A crossbeam is connected between the support platform (51) and the base plate (35). The upper flange of the crossbeam (4) is connected to the base plate (35) by a vertical bolt group two (92). The lower flange of the crossbeam (4) is connected to the support platform (51) by a vertical bolt group three (94).

7. A prefabricated steel structure system, characterized in that: Including the separated beam-column joint of the prefabricated steel structure as described in any one of claims 1-6.

8. The prefabricated steel structure system according to claim 7, characterized in that, Includes the following steps: Step 1: Fix the foundation column segment. There are two fixing methods: The first is to pre-embed bolts in the concrete foundation. After the concrete solidifies, the foundation column segment is fixed to the foundation column segment through the bolts in the concrete foundation. The second is to place the foundation column segment directly on the foundation before pouring the foundation concrete. It is poured together with the steel reinforcement and other components in the foundation. The foundation column segment is fixed after the concrete solidifies. Step 2: Install the bearing platform on the lower column section, lift the crossbeam, and when the lower flange of the crossbeam and the bearing platform are lifted to the same horizontal height, move the crossbeam horizontally to fit the lower flange of the crossbeam with the bearing platform, and fix it with the vertical bolt group 2; Step 3: Lift the connector to the top of the lower column section and slowly lower it vertically so that the side steel component on the connector is inserted into the positioning slot of the lower column section. Continue to lower it until the side steel component is completely embedded in the positioning slot, the concave plate is attached to the vertical stiffening rib and fixed by the horizontal bolt group, and the bottom plate is attached to the upper flange of the crossbeam and fixed by the vertical bolt group. Step 4: Lift the upper column section to be connected, hoist it directly above the connector, and lower it vertically until the box-shaped core of the connector is inserted into the upper column section, the surface of the box-shaped core is in contact with the inner surface of the column section, the flange interface of the upper column section, the gasket of the connector and the horizontal stiffening rib of the lower column section are in contact, and they are fixed together by vertical bolts. Step 5: Repeat steps 1 to 4 for installation on the same floor until the installation of one layer of steel structure is completed. Then repeat steps 2 to 4 for installation layer by layer until the installation of the top layer is completed.

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