Modularized assembly type steel reinforced concrete combined beam column joint and assembly method thereof

Abstract

The invention provides a modular assembly type steel reinforced concrete combined beam column joint and an assembly method thereof. The modular assembly type steel reinforced concrete combined beam column joint comprises a joint core, a steel reinforced concrete combined column, a steel reinforced concrete combined beam, a plurality of single-side self-locking high-strength bolts and a plurality of common high-strength bolts. The node core comprises a node core cavity, at least one connecting end and at least one group of L-shaped connecting end plates; threaded holes are formed in the corresponding positions of the L-shaped connecting end plates. The steel reinforced concrete combination column comprises a column-shaped steel framework and column concrete wrapping the column-shaped steel framework. Bolt holes are formed in the corresponding positions of the columnar steel framework; bolt holes, grouting holes and grout outlet holes are reserved in the corresponding positions of the column concrete; the steel reinforced concrete composite beam comprises a beam shoe, beam H-shaped steel and beam concrete wrapping the beam H-shaped steel. Bolt holes are formed in the corresponding positions of the beam H-shaped steel. The beam shoe is used for being connected with the node core. The scheme has the advantages of convenience in field assembly, high connection reliability, short construction period, capability of realizing dry connection and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of modular assembled building, 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 is a major change in the construction method and an important measure to promote supply-side structural reform and the development of new urbanization. It is conducive to saving resources, reducing construction pollution and improving production efficiency. The node is the force transmission hub of the prefabricated building structure system, and its connection reliability directly affects the normal use of the connected beams, columns and adjacent layers of the node.

[0003] At present, the joint connection of prefabricated building beams and columns mainly includes two methods: wet connection and dry connection. Wet connection requires on-site pouring of concrete to achieve the connection, which has problems such as large construction workload, long cycle, environmental pollution, etc., and is difficult to adapt to the requirements of building industrialization and productive buildings. In contrast, dry connection, as a more convenient connection method, has the following advantages: 1) Small on-site construction workload: Dry connection does not require on-site concrete pouring, only simple assembly is required, the construction speed is faster, and the construction workload and cycle are greatly reduced; 2) Environmentally friendly: Dry connection does not generate construction waste and pollution, and has little impact on the environment; 3) Controllable quality: The production process of dry connection is more precise and standardized, which can improve the reliability and quality of the connection; 4) Easy to disassemble and modify: Dry connection is reusable and disassembled, which is convenient for later maintenance and modification.

[0004] However, the current dry connection is a concept that is summarized in a larger scope, and a concrete 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. To this end, the applicant aims to provide a new modular prefabricated steel-concrete composite beam-column node based on bolt connection, and an assembly method thereof, so as to reduce the difficulty of on-site construction on the basis of optimizing the structural design and promote the application of prefabricated buildings.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0006] The purpose of the present invention is to address the deficiencies of the prior art, thereby providing a modular assembled steel-concrete composite beam-column node and its assembly method that can be designed in a standardized factory, industrialized produced, 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 which the middle steel of the steel-concrete column 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 middle steel of the steel-concrete beam 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.

[0007] 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.

[0008] 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 the 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 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, the connecting end of the steel-concrete composite column is provided with a bolt reserved hole for connecting 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 skeleton cooperates with the plug-in seam in the node core.

[0009] 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 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 fixed by ordinary high-strength bolts. The hanging opening is hung with the connecting end of the node core and connected by a single-sided self-locking high-strength bolt.

[0010] 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.

[0011] Based on the above, the connecting end is a rectangular steel, and a number of threaded holes are arranged on both sides of the rectangular steel. The hanging opening of the beam shoe is a door-shaped hanging opening matching the rectangular steel. A number of bolt holes matching the connecting end are arranged on both sides of the door-shaped hanging opening. After the door-shaped hanging opening is hung on the rectangular steel, it is fixed by a unilateral self-locking high-strength bolt.

[0012] Based on the above, the socket part of the beam shoe includes a beam shoe web and a beam shoe wing plate which 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 a middle 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.

[0013] 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 arranged 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.

[0014] Based on the above, a grouting hole and a grouting hole for connecting the internal cavity of the column steel frame are reserved in the lower area of ​​the column concrete.

[0015] 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 different connection directions and different numbers of connection ends and L-shaped connection end plates.

[0016] A method for assembling a modular assembled steel-concrete composite beam-column node is provided, based on the modular assembled steel-concrete composite beam-column node, and assembled by the following steps: Preparation stage: 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-sided self-locking high-strength bolts and a number of ordinary high-strength bolts are pre-processed in the factory, and the steel-concrete composite beams and beam shoes are assembled in the factory.

[0017] 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 group of L-shaped connecting end plates at the top end of the node core embedded in the foundation.

[0018] A set of L-shaped connecting end plates at the bottom of the second-floor node core are connected to the top of the steel-concrete composite column on the first floor.

[0019] The steel-concrete composite beams of the second floor are connected to the connection ends of the node core of the second floor through beam shoes.

[0020] The bottom end of the second-story steel-concrete composite column is connected to a set of L-shaped connecting end plates at the top of the second-story node core.

[0021] When the second-layer beam and column nodes are connected, tighten each bolt connection to the preset design value using a torque wrench.

[0022] 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.

[0023] 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.

[0024] 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, single-sided self-locking high-strength bolts are used for the connection between the beam and column nodes.

[0025] Compared with the prior art, 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 a node core, a steel-concrete composite column, a steel-concrete composite beam and a beam shoe. Each component can be pre-processed in a 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 single-sided 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 environmental pollution 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.

[0026] 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. The steel-concrete composite column can also be hoisted and plugged in and then connected by bolts. 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

[0027] Figure 1This is an axonometric diagram of the modular assembled steel-concrete beam-column node of the present invention; Figure 2 This is an exploded axonometric diagram of the modular assembled steel-concrete beam-column node of the present invention; Figure 2-1 For the present invention Figure 2 A partial enlarged view of point A in the middle.

[0028] Figure 3 It is a schematic diagram of the exploded front view of the modular assembled steel-concrete beam-column node of the present invention; Figure 4 It is a schematic diagram of the exploded left (right) view of the modular assembled steel-concrete beam-column node of the present invention; Figure 5 It is a schematic diagram of an exploded top view of a modular assembled steel-concrete beam-column node according to the present invention; Figure 6 This is an axonometric diagram of a node core according to the present invention; Figure 7 It is a front view schematic diagram of the node core of the present invention; Figure 8 It is a left (right) schematic diagram of a node core according to the present invention; Fig. 9 A schematic top view of a node core according to the present invention; Fig.10 This is an exploded axonometric diagram of the steel-concrete composite beam of the present invention; Fig.11 It is a schematic diagram of an exploded front view of the steel-concrete composite beam of the present invention; Fig.12 It is a schematic diagram of an exploded left (right) view of the steel-concrete composite beam of the present invention; Fig.13 It is a schematic exploded top view of the steel-concrete composite beam of the present invention.

[0029] 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-type 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

[0030] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0031] Example 1 like Figure 1-Figure 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 a common high-strength bolt 5.

[0032] 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 description. 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.

[0033] 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 a factory and integrally formed or welded together in a factory.

[0034] 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.

[0035] 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 material with a plurality of threaded holes arranged on both sides of the rectangular steel material.

[0036] The group of L-shaped connecting end plates 104 are formed at the upper end and / or lower end of the node core cavity and are arranged to surround each other. A plug-in seam is formed between two adjacent L-shaped connecting end plates, and each of the L-shaped connecting end plates has a threaded hole.

[0037] 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 plurality 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.

[0038] The steel-concrete composite column 2 includes a column steel frame 201 and a column concrete 202 wrapped outside 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 and connect with the L-shaped connecting end plate 104 in the node core 1. The four vertical plates of the column cross-shaped steel 201 are plugged into the four plug-in seams; the connecting 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, which are used to be connected with the L-shaped connecting 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.

[0039] 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.

[0040] The steel-concrete composite beam 3 includes an H-shaped steel beam 301, a beam concrete 302 wrapped outside 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.

[0041] The beam shoe 303 includes a socket part for connecting to the exposed part of the beam H-shaped steel 301 and a hanging opening 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 opening is provided with a bolt hole matching the connecting end of the node core 1.

[0042] The socket part is socketed with the exposed H-shaped steel of the steel-concrete composite beam and fixed by ordinary high-strength bolts, and the hanging opening is connected with the connecting end of the node core by single-side self-locking high-strength bolts.

[0043] Specifically, the hanging opening of the beam shoe 303 is a gate-shaped hanging opening matching the rectangular steel, and a plurality of bolt holes are arranged 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.

[0044] The socket part of the beam shoe 303 includes a beam shoe web 30301 and a beam shoe wing plate 30302 which are not directly connected to each other. The beam shoe web 30301 and the beam shoe wing plate 30302 are both fixed to the back of the hanging mouth. The beam shoe web 30301 includes a clamping plate with a middle gap for clamping the exposed H-shaped steel web, and the beam shoe web bolt hole 3030101 is provided on the clamping plate; 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.

[0045] 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 single-sided self-locking high-strength bolts.

[0046] Technical principle description: 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; 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; This method of disassembling all beam-column structures into beams, columns and node cores is conducive to the rapid assembly of beam-column structures. The connection structure design between the node core and the beams and columns ensures the stability of these structural connections and greatly shortens the construction period. Among them, the cooperation between the node core and the column adopts the method of socket alignment and single-sided high-strength bolt locking, which realizes the dual guarantee of accuracy and stability, while the cooperation between the beam and the node core adopts the method of hanging matching and single-sided high-strength bolt locking, which realizes the accuracy and stability of beam installation; and the unique design of the beam boot enables beam structures of different specifications to be adapted to the node core, enhancing the versatility.

[0047] 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 the highly customized simple beam-column prefabricated structure.

[0048] Example 2 The invention discloses an assembly method of a modular assembled steel-concrete composite beam-column node.

[0049] During factory preparation: Step 1: Processing and manufacturing a node core cavity 101, a first connection end 102, a second connection end 103, and an L-shaped connection end plate 104 in a factory, and welding the above components to form a node core 1, wherein the node core forms include but are not limited to edge node cores, corner node cores, mid-node cores, etc.; 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; Step 3: Process and manufacture the unilateral self-locking high-strength bolts 4. The unilateral self-locking high-strength bolts 4 of different sizes and models can form a bolt library for use as a universal fixing component; 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.

[0050] During construction on site: 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 through a single-side self-locking high-strength bolt 4; Step 6: Connect the bottom L-shaped connection end plate of the second-layer node core 1 of the structure to the top of the first-layer steel-concrete composite column 2 of the structure through a single-side self-locking high-strength bolt 4; Step 7, vertically insert the beam shoe 303 at the end of the steel-concrete composite beam 3 into the first connection end 102 and the second connection end 103 of the node core 1 respectively, and connect them through the single-side self-locking high-strength bolt 4; Step 8: Connect the bottom end of the second-layer steel-concrete composite column 2 to the top L-shaped connection end plate of the second-layer node core 1 of the structure through a single-side self-locking high-strength bolt 4; Step 9: After the second-layer beam-column nodes of the structure 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 preload design value using a torque wrench; Step 10, inject the mixed grouting material mixture through the grouting hole 203, and seal it when the cylindrical grouting material mixture flows out of the grouting hole 204, thus completing the assembly of the beam-column node of one layer; Step 11: Repeat steps 5-9 for assembling the beam-column nodes of the remaining floors to complete the assembly process of the entire building.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than 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, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A modular assembled steel-concrete composite beam-column node, characterized in that: 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 comprises a node core cavity, at least one connection end and at least one group of L-shaped connection end plates, wherein the connection end is arranged on the horizontal side of the node core cavity, and a threaded hole is arranged on the side wall of the connection end; the L-shaped connection end plate is arranged at the upper end and / or the lower end of the node core cavity, a group of L-shaped connection end plates are enclosed to form a connection column head, and a plug-in seam is formed between two adjacent L-shaped connection end plates, and a threaded hole is arranged on the side wall of the L-shaped connection end plate; the steel-concrete composite column comprises 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 connection end plate in the node core, the connection end of the steel-concrete composite column is provided with a bolt reserved hole for connection with the L-shaped connection end plate through a single-sided 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 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 fixed by ordinary high-strength bolts. The hanging opening is hung with the connecting end of the node core and connected by a single-sided self-locking high-strength bolt.

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

3. The modular assembled steel-concrete composite beam-column node according to claim 1 is characterized in that: The connecting end is a rectangular steel, and a plurality of threaded holes are arranged on both sides of the rectangular steel. The hanging opening of the beam shoe is a door-shaped hanging opening matching the rectangular steel, and a plurality of bolt holes matching the connecting end are arranged on both sides of the door-shaped hanging opening. After the door-shaped hanging opening is hung on the rectangular steel, it is fixed by a single-sided self-locking high-strength bolt.

4. The modular assembled steel-concrete composite beam-column node according to claim 3 is characterized in that: The socket part of the beam shoe includes a beam shoe web and a beam shoe wing plate which 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 a middle 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 assembled steel-concrete composite beam-column node 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 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 arranged 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 by a single-sided self-locking high-strength bolt after being plugged in.

6. The modular assembled steel-concrete composite beam-column node according to claim 5 is characterized in that: The lower area of ​​the column concrete is reserved with grouting holes and grouting holes for connecting with the internal cavity of the column steel frame.

7. The modular assembled steel-concrete composite beam-column node according to claim 1 or 2 or 3 or 4 or 6, characterized in that: The node core is divided into an edge node core, a corner node core, a surface node core and a center node core according to different connection directions and different numbers of connection ends and L-shaped connection end plates.

8. A method for assembling a modular assembled steel-concrete composite beam-column node, characterized in that: The modular assembled steel-concrete composite beam-column node according to any one of claims 1 to 7 is assembled by the following steps: Preparation stage: Pre-process 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 a number of ordinary high-strength bolts in the factory, and complete the assembly of steel-concrete composite beams and beam boots in the factory; On-site construction phase: The node core is embedded in the foundation, and the bottom end of the first-floor steel-concrete composite column is connected to a group of L-shaped connecting 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 steel-concrete composite column on the first floor; Connect the steel-concrete composite beams on the second floor to the connection ends of the node cores on the second floor through beam shoes; Connect the bottom end of the second-story steel-concrete composite column to a set of L-shaped connecting 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 grouted through the grouting holes, and the cylindrical grouting material mixture flows out of the grouting holes, and the grouting holes are blocked 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 assembled steel-concrete composite beam-column node 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 beams and columns are made using single-sided self-locking high-strength bolts.

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