Connecting joint of large-diameter concrete filled steel tubular column and steel reinforced concrete beam

Abstract

The utility model provides a connection node of a large diameter concrete filled steel tubular column and a steel reinforced concrete beam, which comprises the concrete filled steel tubular column and the steel reinforced concrete beam connected on the concrete filled steel tubular column, the concrete filled steel tubular column is provided with a steel tube, and a plurality of connection steel plates are arranged in the steel tube. A plurality of steel bars penetrate through the connecting steel plates; the steel reinforced concrete beam is provided with H-shaped steel, longitudinal bars and stirrups, the longitudinal bars are arranged in the length direction of the H-shaped steel, threaded sleeves are connected to the ends, close to the steel pipes, of the longitudinal bars, and the stirrups are used for connecting the longitudinal bars and the H-shaped steel to form a steel reinforcement framework of the steel reinforced concrete beam. The ends, close to the steel pipe concrete column, of the H-shaped steel and the threaded sleeve are welded to the outer wall of the steel pipe. The connecting joint is clear and reasonable in force transmission, has good mechanical properties, ensures reliable connection, enhances the durability of the joint, and meanwhile, is simple in structure and convenient to construct.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, and more specifically, to a connection node between a large-diameter steel tube concrete column and a steel-concrete composite beam. Background Technology

[0002] In recent years, concrete-filled steel tubular (CFST) columns, as a new type of high-efficiency composite structural member, have gained widespread recognition and application in high-rise buildings due to their advantages such as high load-bearing capacity and good seismic performance. Currently, existing connection technologies typically employ inner ring plate joints. For large-diameter CFST columns, this requires a large amount of steel, and the concrete beneath the ring plate is not suitable for dense pouring. Furthermore, the reinforcing bars need to pass through the steel tubing, making construction complex. All of these factors significantly limit its widespread application in high-rise buildings.

[0003] In view of this, the applicant hereby submits this application after studying the existing technology. Utility Model Content

[0004] This utility model provides a connection node between a large-diameter steel tube concrete column and a steel-concrete composite beam, aiming to improve at least one of the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, this utility model provides a connection node between a large-diameter steel-concrete composite column and a steel-concrete composite beam, including a steel-concrete composite column and a steel-concrete composite beam connected to the steel-concrete composite column. The steel-concrete composite column is characterized by having a steel pipe inside which several connecting steel plates are provided at the connection point between the steel-concrete composite column and the steel-concrete composite beam. These connecting steel plates are arranged parallel to each other along a length direction perpendicular to the steel-concrete composite beam, with the two outermost connecting steel plates aligned with the two side edges of the steel-concrete composite beam. Several reinforcing bars pass through the connecting steel plates. The steel-concrete composite beam is provided with H-beams, longitudinal reinforcement, and stirrups. The longitudinal reinforcement is arranged along the length direction of the H-beams and has a threaded sleeve connected to one end near the steel pipe. The stirrups connect the longitudinal reinforcement and the H-beams to form the reinforcing steel skeleton of the steel-concrete composite beam. The H-beams and the threaded sleeves are welded to the outer wall of the steel pipe at the ends near the steel-concrete composite column.

[0006] As a further optimization, four connecting steel plates are provided, and the two sides of the four connecting steel plates are respectively welded to the inner wall of the steel pipe.

[0007] As a further optimization, each of the connecting steel plates is provided with a number of through holes in a matrix, and the reinforcing bars pass through the through holes of each of the connecting steel plates respectively.

[0008] As a further optimization, the longitudinal reinforcement is provided at the top and bottom of the H-beam.

[0009] As a further optimization, the height of the connecting steel plate is higher than the height of the steel-concrete composite beam.

[0010] As a further optimization, the steel-concrete composite column is either a circular steel-concrete composite column or a square steel-concrete composite column.

[0011] As a further optimization, the H-beam is provided with a row of studs on its side wall, and the studs are arranged at equal intervals.

[0012] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0013] The key feature of this application's connection node for large-diameter steel-concrete composite columns and steel-concrete composite beams is the welding of a connecting steel plate to the inner wall of the steel tube in the steel-concrete composite column, and the welding of a threaded sleeve and a steel section to the outer wall. In this connection node, the beam end shear force is transferred to the steel-concrete composite column via the threaded sleeve and connecting steel plate; the beam end bending moment is transferred to the steel tube wall via the steel section, and then to the core concrete via the connecting steel plate. Therefore, the force transmission of this node is clear and reasonable, possessing good mechanical properties, ensuring reliable connection, and enhancing node durability. Simultaneously, this novel connection node has a simple structure and is easy to construct, showing good applicability to corner column nodes, edge column nodes, or center column nodes, achieving convenient connection between steel-concrete composite columns and steel-concrete composite beams. Overall, this application features low cost, high efficiency, and excellent structural performance, providing a reliable solution for connection nodes between steel-concrete composite columns and steel-concrete composite beams. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of a connection node between a large-diameter steel-concrete composite column and a steel-concrete composite beam.

[0016] Figure 2 This is a cross-sectional view of a connection node between a large-diameter steel-concrete composite column and a steel-concrete composite beam.

[0017] Figure 3 This is a top view of the steel pipe and steel-concrete composite beam reinforcement cage connection structure.

[0018] Figure 4 This is a schematic diagram showing the connection between the steel pipe and the connecting steel plate;

[0019] Figure 5 This is a schematic diagram of the connection structure between the steel pipe and the steel-concrete composite beam with reinforcing steel frame.

[0020] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0021] Markings in the diagram: 1 - Steel-concrete composite column; 11 - Steel pipe; 2 - Connecting steel plate; 21 - Through hole; 22 - Reinforcing bar; 3 - Threaded sleeve; 4 - Steel-concrete composite beam; 41 - Longitudinal reinforcement; 42 - Stirrup; 43 - H-beam; 44 - Stud. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Example

[0024] Depend on Figures 1 to 6As shown, this embodiment of the utility model provides a connection node between a large-diameter steel-concrete composite column and a steel-concrete composite beam, including a steel-concrete composite column 1, connecting steel plates 2, and a steel-concrete composite beam 4. The steel-concrete composite beam 4 is connected to the steel-concrete composite column 1, which can be a circular or square steel-concrete composite column. The steel-concrete composite column 1 has a steel pipe 11, and the connecting steel plates 2 are located inside the steel pipe 11 and at the connection between the steel-concrete composite beam 4 and the steel-concrete composite column 1. There are four connecting steel plates 2, which are arranged sequentially along the length direction perpendicular to the steel-concrete composite beam 4 and are parallel to each other. The two outermost connecting steel plates 2 are aligned with the front and rear edges of the steel-concrete composite beam 4. The height of the connecting steel plates 2 is higher than the height of the steel-concrete composite beam 4. The left and right sides of the four connecting steel plates 2 are welded to the inner wall of the steel pipe 1, so that when the pipe wall of the steel pipe 11 is deformed by stress, the force can be transmitted to the core concrete through the connecting steel plates 4. Each connecting steel plate 2 has several through holes 21 arranged in a matrix. Reinforcing bars 22 pass through each through hole 21, connecting the four connecting steel plates 2. The steel-concrete composite beam 4 has H-beams 43, longitudinal reinforcement 41, and stirrups 42. The longitudinal reinforcement 41 is parallel to the length of the H-beams 43 at the top and bottom. A threaded sleeve 3 is connected to the end of each longitudinal reinforcement 41 near the steel pipe 11. The stirrups 42 connect and fix the H-beams 43 and the longitudinal reinforcement 41 to form the reinforcing steel skeleton of the steel-concrete composite beam 4. The ends of the H-beams 43 and the threaded sleeves 3 near the steel pipe 11 are welded to the outer wall of the steel pipe 11. The tight interlocking of the H-beams 43 and the threaded sleeves 3 ensures that shear force can be effectively transferred between the steel-concrete composite beam 4 and the steel-concrete composite column 1, thereby enhancing the overall stiffness and stability of the connection joint. A row of studs 44 can be installed in the middle of the H-beams 43, with the studs 44 evenly distributed.

[0025] This application also provides a construction method for the connection joint between a large-diameter steel-concrete composite column and a steel-concrete composite beam, the method comprising the following steps:

[0026] S1: Prepare steel pipe 11 and mark the connection position with steel-concrete composite beam 4 on steel pipe 11.

[0027] S2: Cut and prepare four connecting steel plates 2, pre-open through holes 21 on the connecting steel plates 2, and pass the reinforcing bars 22 through the through holes 21 on the connecting steel plates 2 to connect and fix the four connecting steel plates 2 together to form an embedded steel plate frame. The distance between the two outermost connecting steel plates 2 is the same as the width of the steel-concrete beam 4.

[0028] S3: Place the embedded steel plate frame inside the predetermined position of the steel pipe 11, and weld the two sides of the four connecting steel plates 2 to the inner wall of the steel pipe 11 respectively. The two outermost connecting steel plates 2 need to be aligned with the front and rear edges of the steel-concrete beam 4.

[0029] S4: Prepare H-beams 43, longitudinal reinforcement 41, stirrups 42, and threaded sleeves 3. Connect the threaded sleeve 3 to one end of the longitudinal reinforcement 41. Then, according to design requirements, use the stirrups 42 to tie or weld the H-beams 43 and longitudinal reinforcement 41 to form a reinforcing steel skeleton. Next, weld the threaded sleeve 3 and the H-beams to the outer wall of the steel pipe 11 at predetermined positions, ensuring a tight fit between the threaded sleeve 3, the H-beams 43, and the outer wall of the steel pipe 11. Figure 5 and Figure 6 As shown;

[0030] S5: Pour concrete into the steel pipe 11 to form a steel-concrete composite column 1;

[0031] S6: After the construction of the steel-concrete composite column 1 is completed, formwork is arranged and erected outside the reinforcing steel cage of the H-shaped steel-concrete beam, and the beam concrete is poured; after the concrete hardens, the formwork is removed, thus completing the connection between the steel-concrete composite column 1 and the steel-concrete beam 4. Figure 1 As shown.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A connection joint of a large-diameter concrete-filled steel tube column and a steel reinforced concrete beam, comprising a concrete-filled steel tube column and a steel reinforced concrete beam connected to the concrete-filled steel tube column, characterized in that, The steel pipe concrete column is provided with a steel pipe, a plurality of connecting steel plates are arranged inside the steel pipe at the connection between the steel pipe concrete column and the steel reinforced concrete beam, the plurality of connecting steel plates are arranged in parallel along the direction perpendicular to the length of the steel reinforced concrete beam, the outermost two connecting steel plates are aligned with the two side edges of the steel reinforced concrete beam, and a plurality of steel bars are arranged through the plurality of connecting steel plates; the steel reinforced concrete beam is provided with an H-shaped steel, longitudinal reinforcement and stirrups, the longitudinal reinforcement is arranged along the length direction of the H-shaped steel, and a threaded sleeve is connected to one end of the H-shaped steel close to the steel pipe, the stirrups are used to connect the longitudinal reinforcement and the H-shaped steel to form a steel reinforcement framework of the steel reinforced concrete beam, and the H-shaped steel and the threaded sleeve are respectively welded to the outer wall of the steel pipe at one end close to the steel pipe concrete column.

2. A connection joint of a large diameter concrete filled steel tubular column and a steel reinforced concrete beam according to claim 1, characterized in that The connecting steel plates are four in number, and the two sides of the four connecting steel plates are respectively welded to the inner wall of the steel pipe.

3. The connection joint of a large diameter concrete filled steel tubular column to a steel reinforced concrete beam according to claim 1, characterized in that A plurality of through holes are arranged in matrix on each connecting steel plate, and the steel bars are respectively arranged through the through holes on each connecting steel plate.

4. The connection joint of a large diameter concrete filled steel tubular column to a steel reinforced concrete beam according to claim 1, characterized in that The longitudinal reinforcement is arranged at the top and bottom of the H-shaped steel.

5. The connection joint of a large diameter concrete filled steel tubular column to a steel reinforced concrete beam according to claim 1, characterized in that The height of the connecting steel plate is higher than the height of the steel reinforced concrete beam.

6. The connection joint of a large diameter concrete filled steel tubular column to a steel reinforced concrete beam according to claim 1, characterized in that The steel pipe concrete column is a round steel pipe concrete column or a square steel pipe concrete column.

7. The connection joint of a large diameter concrete filled steel tubular column to a steel reinforced concrete beam according to claim 1, characterized in that The H-shaped steel is provided with a row of dowels on the side wall, and the dowels are arranged at equal intervals.

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