A modular assembled steel-concrete composite beam-column node and its assembly method

Abstract

The present invention provides a modular prefabricated steel-concrete composite beam-column joint and its assembly method. The joint comprises a joint core, a steel-concrete composite column, a steel-concrete composite beam, a plurality of single-side self-locking high-strength bolts, and a plurality of conventional high-strength bolts. The joint core comprises a joint core cavity, at least one connection end, and at least one set of L-shaped connection end plates; the L-shaped connection end plates are provided with threaded holes at corresponding positions; the steel-concrete composite column comprises a column steel skeleton and column concrete wrapped around the column steel skeleton; bolt holes are provided at corresponding positions on the column steel skeleton; bolt holes, grouting holes, and grouting holes are reserved at corresponding positions in the column concrete; the steel-concrete composite beam comprises a beam shoe, an H-shaped steel beam, and beam concrete wrapped around the H-shaped steel beam; bolt holes are provided at corresponding positions on the H-shaped steel beam; the beam shoe is used to connect to the joint core. This solution offers the advantages of convenient on-site assembly, strong connection reliability, a short construction period, and the ability to achieve dry connections.

Description

Technical Field

[0001] The present invention relates to the technical field of modular assembled buildings, and in particular to a modular assembled steel-concrete composite beam-column node and an assembly method thereof. Background Art

[0002] The development of prefabricated buildings represents a significant shift in construction methods and a crucial initiative for advancing supply-side structural reform and the development of new urbanization. It also contributes to resource conservation, reduced construction pollution, and improved production efficiency. Nodes, the force-transmitting hubs of prefabricated building structures, have a direct impact on the reliability of their connected beams and columns, as well as the performance of adjacent floors.

[0003] Currently, prefabricated building beam-column connections primarily include wet connections and dry connections. Wet connections require on-site concrete pouring, which presents challenges such as heavy construction workload, long construction cycles, and environmental pollution, making them difficult to adapt to the requirements of industrialized construction and production-oriented buildings. In contrast, dry connections, as a more convenient connection method, offer the following advantages:

[0004] 1) Small on-site construction workload: Dry connection does not require on-site concrete pouring, only simple assembly is required, which makes the construction faster and greatly reduces the construction workload and cycle;

[0005] 2) Environmentally friendly: Dry connection does not generate construction waste and pollution, and has little impact on the environment;

[0006] 3) Controllable quality: The production process of dry connection is more precise and standardized, which can improve the reliability and quality of the connection;

[0007] 4) Easy to disassemble and modify: Dry connection is reusable and disassembled, which is convenient for later maintenance and modification.

[0008] However, the current dry connection is a concept that has been summarized in a large range, and a specific and systematic connection method has not been formed in the connection structures such as beams and columns. For example, some beam-column structures connected by bolts require cranes and workers to perform high-precision splicing operations at the beam-column joints during on-site construction, which is extremely difficult to operate. Therefore, the applicant aims to provide a new modular prefabricated steel-concrete composite beam-column node based on bolt connection, and its assembly method, so as to reduce the difficulty of on-site construction on the basis of optimizing structural design and promote the application of prefabricated buildings.

[0009] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0010] The purpose of the present invention is to address the deficiencies of the existing technology and thus provide a modular prefabricated steel-concrete composite beam-column node and its assembly method that can be designed in a standardized factory, industrialized, assembled on-site in an integrated manner, and has a short construction period. The beams and columns connected by the node are all made of steel-concrete composite components. Among them, the steel-concrete column medium steel adopts the form of cross-shaped steel, which can improve the compressive bearing capacity of the column and enhance the lateral and bending stiffness of the structure; the steel-concrete beam medium steel adopts H-shaped steel, which can effectively improve the bending and shear bearing capacity of the beam. This node form can be used in heavy-load, large-span civil and industrial buildings.

[0011] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a modular assembled steel-concrete composite beam-column node, including a node core, a steel-concrete composite column, a steel-concrete composite beam, a single-sided self-locking high-strength bolt and a plurality of ordinary high-strength bolts.

[0012] The node core includes a node core cavity, at least one connecting end and at least one group of L-shaped connecting end plates, the connecting end is arranged on the horizontal side of the node core cavity, and a threaded hole is arranged on the side wall of the connecting end; the L-shaped connecting end plate is arranged at the upper end and / or lower end of the node core cavity, a group of L-shaped connecting end plates are enclosed to form a connecting column head, and a plug-in seam is formed between two adjacent L-shaped connecting end plates, and a threaded hole is arranged on the side wall of the L-shaped connecting end plate; the steel-concrete composite column includes a column steel frame and column concrete wrapped outside the column steel frame, the steel-concrete composite column is used to cooperate with the L-shaped connecting end plate in the node core, the connecting end of the steel-concrete composite column is provided with a bolt reserved hole for connection with the L-shaped connecting end plate through a single-sided self-locking high-strength bolt, and the vertical plate structure in the column steel frame cooperates with the plug-in seam in the node core.

[0013] The steel-concrete composite beam includes an H-shaped steel beam, beam concrete wrapped outside the H-shaped steel beam, and a beam shoe. Both ends of the H-shaped steel beam are exposed and provided with bolt holes. The rear end of the beam shoe is a socket part that is plugged into the exposed part of the H-shaped steel beam. The front end of the beam shoe is provided with a hanging opening for connecting to the connecting end of the node core. The socket part and the hanging opening are provided with bolt holes. The socket part is socketed with the exposed H-shaped steel of the steel-concrete composite beam and is fixed by ordinary high-strength bolts. The hanging opening is hung with the connecting end of the node core and is connected by unilateral self-locking high-strength bolts.

[0014] Based on the above, the node core cavity is a hollow cubic steel material, and the connecting end head and the L-shaped connecting end plate are integrally formed or welded with the node core cavity.

[0015] Based on the above, the connecting end is a rectangular steel, and a number of threaded holes are set on both sides of the rectangular steel. The hanging mouth of the beam shoe is a door-shaped hanging mouth that matches the rectangular steel. A number of bolt holes matching the connecting end are set on both sides of the door-shaped hanging mouth. After the door-shaped hanging mouth is hung on the rectangular steel, it is fixed by a unilateral self-locking high-strength bolt.

[0016] Based on the above, the socket part of the beam shoe includes a beam shoe web and a beam shoe wing plate that are not directly connected to each other, and the beam shoe web and the beam shoe wing plate are both fixed to the back of the hanging mouth, and the beam shoe web includes a clamping plate with an intermediate gap for clamping the exposed H-shaped steel web, and bolt holes are provided on the clamping plate; the beam shoe wing plate is provided with a groove for socketing the exposed H-shaped steel web, and the beam shoe wing plate is fitted with the exposed H-shaped steel wing plate after being plugged into the exposed H-shaped steel web.

[0017] Based on the above, the cross-section of the single L-shaped connecting end plate is in the shape of an angle steel with a transition angle, and a number of threaded holes are vertically distributed along the plate surface of the L-shaped connecting end plate. Four L-shaped connecting end plates are enclosed to form a group, and a group of L-shaped connecting end plates forms four cross-shaped plug-in seams; the column steel frame is a column cross-shaped steel, and the four vertical plates of the column cross-shaped steel are plugged into the four plug-in seams; through bolt holes are provided on the column concrete and the column cross-shaped steel, and the L-shaped connecting end plate is connected and fixed to the steel-concrete composite column through a unilateral self-locking high-strength bolt.

[0018] Based on the above, a grouting hole and a grouting hole for connecting to the internal cavity of the column steel frame are reserved in the lower area of ​​the column concrete.

[0019] Based on the above, the node core is divided into edge node core, corner node core, surface node core and center node core according to the different connection directions and the number of connection ends and L-shaped connection end plates.

[0020] A modular prefabricated steel-concrete composite beam-column node assembly method is provided, based on the modular prefabricated steel-concrete composite beam-column node, and assembled by the following steps:

[0021] Preparation stage:

[0022] The node cores, steel-concrete composite columns, steel-concrete composite beams of the required size and quantity, as well as the required number and specifications of single-side self-locking high-strength bolts and several ordinary high-strength bolts are pre-fabricated in the factory, and the steel-concrete composite beams and beam shoes are assembled in the factory.

[0023] On-site construction phase:

[0024] A node core is embedded in the foundation, and the bottom end of the first-floor steel-concrete composite column is connected to a set of L-shaped connection end plates at the top end of the node core embedded in the foundation.

[0025] Connect a set of L-shaped connection end plates at the bottom end of the second-floor node core to the top end of the steel-concrete composite column on the first floor.

[0026] The steel-concrete composite beams on the second floor are connected to the connection ends of the node core on the second floor through beam shoes.

[0027] The bottom end of the second-story steel-concrete composite column is connected to a set of L-shaped connection end plates at the top of the second-story node core.

[0028] When the second-layer beam and column nodes are connected, tighten each bolt connection to the preset design value using a torque wrench.

[0029] The mixed grouting material mixture is injected through the grouting holes, and the cylindrical grouting material mixture flows out of the grouting holes and is sealed to complete the assembly of the first layer of beam and column nodes.

[0030] Repeat the assembly process of beam and column nodes on one floor to complete the assembly of beam and column nodes on the remaining floors.

[0031] Based on the above, in the preparation stage, high-strength bolts are used in the combination process of the exposed part of the beam H-shaped steel and the beam shoe; in the on-site construction stage, unilateral self-locking high-strength bolts are used for the connection between the beam and column nodes.

[0032] Compared with the existing technology, the present invention has outstanding substantial features and significant progress. Specifically, based on the concept of dry connection, the present invention classifies the structure of the beam-column node into a structural combination including node core, steel-concrete composite column, steel-concrete composite beam and beam shoe. Each component can be pre-processed in the factory and transported to the construction site. After being connected, it can be assembled on site and stably connected by plug-in splicing, high-strength bolts and unilateral self-locking bolts. The connection is reliable, and then concrete grouting is performed to achieve rapid assembly of the entire structure. The entire construction period is short, the operation is simple, and the pollution to the environment is extremely small. In practical applications, the node can be widely used in the structural systems of various types of prefabricated buildings, contributing to the promotion of the industrialization of construction projects and the development of productive buildings.

[0033] Unlike traditional prefabricated buildings, the present invention particularly considers the convenience of on-site construction of modular prefabricated buildings. In this solution, the installation of beam-column nodes can be assembled and connected by hoisting. For example, the hanging mouth of the beam shoe and the connecting end of the node core can be hung by a crane and then bolted together. The steel-concrete composite column can also be hoisted and plugged in and then bolted together. This is consistent with the design of existing construction sites that usually use cranes to enter the site, reducing the difficult operations of a large number of horizontal splicing in traditional solutions, and greatly improving the convenience and efficiency of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1This is an axonometric diagram of the modular assembled steel-concrete beam-column node of the present invention;

[0035] Figure 2 This is an exploded axonometric diagram of the modular assembled steel-concrete beam-column node of the present invention;

[0036] Figure 2-1 For the present invention Figure 2 A partial enlarged view of point A in the middle.

[0037] Figure 3 This is an exploded front view schematic diagram of the modular assembled steel-concrete beam-column node of the present invention;

[0038] Figure 4 Schematic diagram of the exploded left (right) view of the modular assembled steel-concrete beam-column node of the present invention;

[0039] Figure 5 This is an exploded top view of the modular assembled steel-concrete beam-column node of the present invention;

[0040] Figure 6 This is an axonometric diagram of the node core according to the present invention;

[0041] Figure 7 This is a schematic front view of the node core of the present invention;

[0042] Figure 8 Schematic diagram of the left (right) view of the node core according to the present invention;

[0043] Figure 9 This is a top view schematic diagram of the node core of the present invention;

[0044] Figure 10 This is an exploded axonometric diagram of the steel-concrete composite beam of the present invention;

[0045] Figure 11 This is an exploded front view schematic diagram of the steel-concrete composite beam of the present invention;

[0046] Figure 12 Schematic diagram of the exploded left (right) view of the steel-concrete composite beam of the present invention;

[0047] Figure 13 This is a schematic exploded top view of the steel-concrete composite beam of the present invention.

[0048] Among them, 1 node core, 2 steel-concrete composite column, 3 steel-concrete composite beam, 4 single-side self-locking high-strength bolts, 5 ordinary high-strength bolts, 101 node core cavity, 102 first connection end, 103 second connection end, 104 L-shaped connection end plate, 105 threaded hole, 201 column cross steel, 202 column concrete, 203 grouting hole, 204 grouting hole, 205 concrete bolt reserved hole, 20101 cross steel bolt hole, 301 beam H-steel, 302 beam concrete, 303 beam shoe, 304 beam shoe bolt hole, 30101 beam H-steel web bolt hole, 30301 beam shoe web, 30302 beam shoe flange, 3030101 beam shoe web bolt hole. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0050] Example 1

[0051] like Figures 1-13 As shown, a modular assembled steel-concrete composite beam-column node includes a node core 1, a steel-concrete composite column 2, a steel-concrete composite beam 3, a single-side self-locking high-strength bolt 4 and an ordinary high-strength bolt 5.

[0052] The node core 1 includes a node core cavity 101, at least one connecting end and at least one group of L-shaped connecting end plates 104. In this embodiment, a cross-shaped node core is taken as an example for illustration. A first connecting end 102 and a second connecting end 103 are respectively arranged on the horizontal sides of the node core cavity 101, and a group of L-shaped connecting end plates are respectively arranged at the top and bottom ends of the node core cavity 101.

[0053] In this embodiment, the node core cavity is a hollow cubic steel material, and the connecting end head and the L-shaped connecting end plate are prefabricated in the factory and integrally formed or welded together in the factory.

[0054] The node core is divided into edge node core, corner node core, surface node core and center node core according to the different connection directions, the number of connection ends and L-shaped connection end plates. Among them, the edge node core is a node core used to form a structural edge, and its characteristic is that the connection ends in the horizontal direction are on the same straight line. The corner node core is used to form a structural angle, and its characteristic is that the connection ends in the horizontal direction form an angle. The surface node core is the node core type in this embodiment, which is cross-shaped. Compared with the surface node core, the center node core will increase the number of connection ends in the horizontal direction, and the number can be expanded to four or more. The angle between adjacent connection ends needs to be determined according to the architectural design.

[0055] The connecting end is a profile bearing joint with threaded holes formed on the horizontal side of the node core cavity. In this embodiment, the connecting end is a rectangular steel with a plurality of threaded holes provided on both sides of the rectangular steel.

[0056] The group of L-shaped connecting end plates 104 are formed by several L-shaped connecting end plates arranged together at the upper end and / or lower end of the node core cavity, and a joint is formed between two adjacent L-shaped connecting end plates, and each of the L-shaped connecting end plates has a threaded hole.

[0057] In this embodiment, the cross-section of the single L-shaped connecting end plate 104 is in the shape of an angle steel with a transition angle, and a number of threaded holes 105 are vertically distributed along the plate surface of the L-shaped connecting end plate. Four L-shaped connecting end plates are combined to form a group, and a group of L-shaped connecting end plates forms four cross-shaped plug-in seams.

[0058] The steel-concrete composite column 2 includes a column steel frame 201 and a column concrete 202 wrapped around the column steel frame 201. In this embodiment, the column steel frame 201 is a column cross-shaped steel. The steel-concrete composite column 2 is used to cooperate with the L-shaped connection end plate 104 in the node core 1, and the four vertical plates of the column cross-shaped steel 201 are plugged into the four plug-in seams; the connection end of the steel-concrete composite column 2 is provided with a concrete bolt reserved hole 205 and a cross-shaped steel bolt hole 20101 that are positioned opposite to each other, and is used to be connected to the L-shaped connection end plate 104 through a single-sided self-locking high-strength bolt, and the vertical plate structure in the column steel frame 201 cooperates with the plug-in seam in the node core.

[0059] The lower area of ​​the column concrete 202 is reserved with a grouting hole 203 and a grouting hole 204 for connecting to the internal cavity of the column steel frame.

[0060] The steel-concrete composite beam 3 includes an H-shaped steel beam 301, a beam concrete 302 wrapped around the H-shaped steel beam 301, and a beam shoe 303. Both ends of the H-shaped steel beam 301 are exposed and provided with bolt holes. In this embodiment, the bolt holes are provided on the web, which are the H-shaped steel web bolt holes 30101.

[0061] The beam shoe 303 includes a socket part for connecting to the exposed part of the beam H-shaped steel 301 and a hanging mouth for connecting to the connecting end of the node core 1. The socket part is provided with a beam shoe bolt hole 304, and the hanging mouth is provided with a bolt hole that matches the connecting end of the node core 1.

[0062] The socket part is socketed with the exposed H-shaped steel of the steel-concrete composite beam and fixed with ordinary high-strength bolts, and the hanging opening is hung with the connecting end of the node core and connected with unilateral self-locking high-strength bolts.

[0063] Specifically, the hanging opening of the beam shoe 303 is a gate-shaped hanging opening that matches the rectangular steel. A number of bolt holes are set on both sides of the gate-shaped hanging opening. After the gate-shaped hanging opening is hung with the rectangular steel, it is fixed by a unilateral self-locking high-strength bolt.

[0064] The socket part of the beam shoe 303 includes a beam shoe web 30301 and a beam shoe wing plate 30302 that are not directly connected to each other. The beam shoe web 30301 and the beam shoe wing plate 30302 are both fixed on the back of the hanging mouth. The beam shoe web 30301 includes a clamping plate with an intermediate gap for clamping the exposed H-shaped steel web, and the clamping plate is provided with a beam shoe web bolt hole 3030101; the beam shoe wing plate 30302 is provided with a groove for socketing the exposed H-shaped steel web, and the beam shoe wing plate 30302 is fitted with the exposed H-shaped steel wing plate after being plugged into the exposed H-shaped steel web.

[0065] In this embodiment, except that the beam shoe 303 and the beam H-shaped steel 301 are connected by ordinary high-strength bolts, other connections such as the beam shoe 303 and the node core 1 and the steel-concrete composite column 2 and the node core 1 are connected by unilateral self-locking high-strength bolts.

[0066] Technical principle description:

[0067] After the building structure is determined, the size and required quantity of beams and columns are calculated according to the building structure, and then prefabricated in the factory;

[0068] The produced parts are pre-assembled into a part of the structure in the factory, mainly divided into beam structure, column structure and node core;

[0069] This method of disassembling all beam-column structures into beams, columns, and node cores facilitates the rapid assembly of the beam-column structure. The connection structure design between the node core and the beams and columns ensures the stability of these structural connections and significantly shortens the construction period.

[0070] Among them, the cooperation between the node core and the column adopts the method of socket centering and unilateral high-strength bolt locking, which achieves the dual guarantee of accuracy and stability, while the cooperation between the beam and the node core adopts the method of hanging matching and unilateral high-strength bolt locking, which achieves accurate and stable beam installation; and the unique design of the beam boot enables beam structures of different specifications to be adapted to the node core, enhancing versatility.

[0071] Overall, compared with traditional prefabricated composite structures, this prefabricated structure is more versatile, and has more guaranteed assembly accuracy and stability. It is a new systematic and modular design form, and has obvious advantages over highly customized simple beam-column prefabricated structures.

[0072] Example 2

[0073] The invention discloses an assembly method for a modular assembled steel-concrete composite beam-column node.

[0074] During factory preparation:

[0075] Step 1: The node core cavity 101, the first connecting end 102, the second connecting end 103, and the L-shaped connecting end plate 104 are manufactured in the factory and welded together to form the node core 1. The node core types include but are not limited to edge node core, corner node core, mid-node core, etc.

[0076] Step 2: Processing and manufacturing the steel-concrete composite column 2, the steel-concrete composite beam 3 and the beam shoe 303 in the factory;

[0077] Step 3: Process and manufacture unilateral self-locking high-strength bolts 4. Unilateral self-locking high-strength bolts 4 of different sizes and models can form a bolt library for use as universal fixing components.

[0078] Step 4: Connect the H-shaped steel 301 and the beam shoe 303 of the steel-concrete composite beam 3 into a whole through ordinary high-strength bolts 5.

[0079] During construction on site:

[0080] Step 5: Connect the bottom end of the first-floor steel-concrete composite column 2 to the top L-shaped connecting end plate 104 of the node core 1 embedded in the foundation using a unilateral self-locking high-strength bolt 4;

[0081] Step 6: Connect the bottom L-shaped connection end plate of the second-floor node core 1 to the top of the first-floor steel-concrete composite column 2 using a unilateral self-locking high-strength bolt 4;

[0082] Step 7: Vertically insert the beam shoe 303 at the end of the steel-concrete composite beam 3 into the first connecting end 102 and the second connecting end 103 of the node core 1, and connect them with the unilateral self-locking high-strength bolt 4;

[0083] Step 8: Connect the bottom end of the second-story steel-concrete composite column 2 to the top L-shaped connection end plate of the second-story node core 1 using a unilateral self-locking high-strength bolt 4;

[0084] Step 9: After the second-layer beam-column joints are basically connected, tighten the single-side self-locking high-strength bolts 4 and the ordinary high-strength bolts 5 in steps 4-5 to the designed preload force using a torque wrench.

[0085] Step 10: Inject the mixed grouting material mixture through the grouting hole 203 and seal the grouting material mixture when it flows out of the grouting hole 204. This completes the assembly of the beam-column node of one layer.

[0086] Step 11: Repeat steps 5-9 for the assembly of beam-column nodes on the remaining floors to complete the assembly process of the entire building.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. A modular prefabricated steel-concrete composite beam-column joint, characterized by: Including node core, steel-concrete composite column, steel-concrete composite beam, single-side self-locking high-strength bolts and several ordinary high-strength bolts; The node core includes a node core cavity, at least one connecting end and at least one group of L-shaped connecting end plates, the connecting end being arranged on the horizontal side of the node core cavity, and a threaded hole being arranged on the side wall of the connecting end; the L-shaped connecting end plate is arranged at the upper end and / or the lower end of the node core cavity, a group of L-shaped connecting end plates are enclosed to form a connecting column head, a plug-in seam is formed between two adjacent L-shaped connecting end plates, and a threaded hole is arranged on the side wall of the L-shaped connecting end plate; the steel-concrete composite column includes a column steel skeleton and column concrete wrapped outside the column steel skeleton, the steel-concrete composite column is used to cooperate with the L-shaped connecting end plate in the node core for connection, the connecting end of the steel-concrete composite column is provided with a bolt reserved hole for connection with the L-shaped connecting end plate by a unilateral self-locking high-strength bolt, and the vertical plate structure in the column steel skeleton cooperates with the plug-in seam in the node core; The steel-concrete composite beam includes an H-shaped steel beam, beam concrete wrapped outside the H-shaped steel beam, and a beam shoe. Both ends of the H-shaped steel beam are exposed and provided with bolt holes. The rear end of the beam shoe is a socket part that is plugged into the exposed part of the H-shaped steel beam. The front end of the beam shoe is provided with a hanging opening for connecting to the connecting end of the node core. The socket part and the hanging opening are provided with bolt holes. The socket part is socketed with the exposed H-shaped steel of the steel-concrete composite beam and is fixed by ordinary high-strength bolts. The hanging opening is hung with the connecting end of the node core and is connected by unilateral self-locking high-strength bolts.

2. The modular prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that: The node core cavity is a hollow cubic steel material, and the connecting end head and the L-shaped connecting end plate are integrally formed with the node core cavity or connected by welding.

3. The modular prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that: The connecting end is a rectangular steel, and a number of threaded holes are set on both sides of the rectangular steel. The hanging mouth of the beam shoe is a door-shaped hanging mouth that matches the rectangular steel. A number of bolt holes matching the connecting end are set on both sides of the door-shaped hanging mouth. After the door-shaped hanging mouth is hung on the rectangular steel, it is fixed by a unilateral self-locking high-strength bolt.

4. The modular prefabricated steel-concrete composite beam-column joint according to claim 3 is characterized by: The socket part of the beam shoe includes a beam shoe web and a beam shoe wing plate that are not directly connected to each other. The beam shoe web and the beam shoe wing plate are both fixed to the back of the hanging mouth. The beam shoe web includes a clamping plate with an intermediate gap for clamping the exposed H-shaped steel web, and bolt holes are provided on the clamping plate; the beam shoe wing plate is provided with a groove for socketing the exposed H-shaped steel web, and the beam shoe wing plate is fitted with the exposed H-shaped steel wing plate after being plugged into the exposed H-shaped steel web.

5. The modular prefabricated steel-concrete composite beam-column joint according to claim 1, 2, 3 or 4, characterized in that: The cross section of the single L-shaped connecting end plate is in the shape of an angle steel with a transition angle. A number of threaded holes are vertically distributed along the plate surface of the L-shaped connecting end plate. Four L-shaped connecting end plates are combined to form a group, and a group of L-shaped connecting end plates forms four cross-shaped plug-in seams; the column steel frame is a column cross-shaped steel, and the four vertical plates of the column cross-shaped steel are plugged into the four plug-in seams; through bolt holes are provided on the column concrete and the column cross-shaped steel, and the L-shaped connecting end plate is fixed to the steel-concrete composite column through unilateral self-locking high-strength bolts after being plugged in.

6. The modular prefabricated steel-concrete composite beam-column joint according to claim 5, characterized in that: The lower area of ​​the column concrete is reserved with grouting holes and grouting holes for communicating with the internal cavity of the column steel skeleton.

7. The modular prefabricated steel-concrete composite beam-column joint according to claim 1, 2, 3, 4, or 6, characterized in that: The node cores are divided into edge node cores, corner node cores, surface node cores and center node cores according to different connection directions and the number of connection ends and L-shaped connection end plates.

8. A method for assembling a modular prefabricated steel-concrete composite beam-column joint, characterized by: The modular prefabricated steel-concrete composite beam-column node according to any one of claims 1 to 7 is assembled by the following steps: Preparation stage: The required size and quantity of node cores, steel-concrete composite columns, steel-concrete composite beams, as well as the required number and specifications of single-side self-locking high-strength bolts and a number of ordinary high-strength bolts are pre-fabricated in the factory, and the steel-concrete composite beams and beam shoes are assembled in the factory; On-site construction phase: A node core is embedded in the foundation, and the bottom end of the first-floor steel-concrete composite column is connected to a set of L-shaped connection end plates at the top end of the node core embedded in the foundation; Connect a set of L-shaped connection end plates at the bottom of the second-floor node core to the top of the first-floor steel-concrete composite columns; Connect the steel-concrete composite beams on the second floor to the connection ends of the second floor node core through beam shoes; Connect the bottom end of the second-story steel-concrete composite column to a set of L-shaped connection end plates at the top of the second-story node core; When the second-layer beam and column nodes are connected, tighten each bolt connection to the preset design value using a torque wrench; The mixed grouting material mixture is injected through the grouting hole, and the cylindrical grouting material mixture is blocked when it flows out of the grouting hole to complete the assembly of the beam and column nodes of the first layer; Repeat the assembly process of beam and column nodes on one floor to complete the assembly of beam and column nodes on the remaining floors.

9. The method for assembling a modular prefabricated steel-concrete composite beam-column joint according to claim 8, characterized in that: In the preparation stage, high-strength bolts are used in the assembly process of the exposed part of the beam H-beam and the beam shoe; During the on-site construction phase, the connections between beam and column nodes are made using single-sided self-locking high-strength bolts.

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