Laminated steel pipe concrete column connecting structure and construction method
By combining external and internal steel connectors, the perforation of steel pipes is reduced, which solves the problem of reduced bending and shear resistance in the connection between composite steel tube concrete columns and reinforced concrete beams, and improves the bearing capacity and construction quality of the joint area.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2026-04-03
AI Technical Summary
When composite steel tube concrete columns are connected to reinforced concrete beams, the steel tube sections are reinforced with reinforcing bars, which reduces the bending and shear resistance of the connection area, making construction difficult and quality hard to guarantee.
External steel connectors are used to connect to the discontinuous reinforcing bars at the beam ends. The continuous reinforcing bars at the beam ends pass through the gap between the longitudinal and transverse reinforcing bars of the column outside the steel pipe. Combined with internal steel connectors and reinforcing members, the number of holes in the steel pipe is reduced. Bending moment and shear force are transmitted through the external steel connectors, while the internal steel connectors improve the local stiffness of the steel pipe.
It improves the shear and flexural bearing capacity and ductility of the joint area of the composite steel tube concrete column, simplifies the construction process, and improves the construction quality and mechanical properties.
Smart Images
Figure CN121781680A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of structural engineering technology, and specifically relates to a connection structure and construction method for composite steel tube concrete columns. Background Technology
[0002] Composite steel-concrete composite columns are important structural members, often connected to reinforced concrete beams. When connecting a composite steel-concrete composite column to a reinforced concrete beam, typically a portion of the beam's longitudinal reinforcement passes through the composite concrete section, while another portion passes through the steel tube. Through-holes are created in the steel tube in conjunction with the beam's longitudinal reinforcement, through which the beam's longitudinal reinforcement passes before the concrete inside the tube is poured. When a large number of longitudinal reinforcements pass through the steel tube, this method can easily weaken the load-bearing capacity of the column joint area, making reinforcement installation difficult and resulting in incomplete compaction of the concrete inside the tube. Summary of the Invention
[0003] The purpose of this invention is to provide a connection structure and construction method for composite steel tube concrete columns and reinforced concrete beams, in order to solve the technical problems of reduced bending and shear resistance in the steel tube concrete connection area caused by steel tube cross-section reinforcement, high construction difficulty, and difficulty in ensuring construction quality.
[0004] To achieve the above objectives, the present invention adopts the following technical solution.
[0005] A composite steel-concrete composite column connection structure includes a composite steel-concrete composite column A, a reinforced concrete beam B, and an external steel connector 10. The composite steel-concrete composite column A includes a steel pipe 1, concrete inside the pipe 2, longitudinal reinforcement 21, transverse reinforcement 22, and concrete outside the pipe 23. The reinforced concrete beam B includes concrete 3, longitudinal reinforcement 4, and transverse reinforcement 5. The longitudinal reinforcement 4 includes continuous reinforcement 4.1 and discontinuous reinforcement 4.2 at the beam end. The external steel connector 10 is located outside the steel pipe 1 and is arranged correspondingly to the reinforced concrete beam B. One end is fixedly connected to the steel pipe 1, and the other end is connected to the discontinuous reinforcement 4.2 at the beam end. The concrete inside the pipe 2 fills the steel pipe 1.
[0006] Preferably, the continuous reinforcement 4.1 at the beam end includes the upper continuous reinforcement 4.1.1 and the lower continuous reinforcement 4.1.2 at the beam end; the discontinuous reinforcement 4.2 at the beam end includes the upper discontinuous reinforcement 4.2.1 and the lower discontinuous reinforcement 4.2.2 at the beam end; the continuous reinforcement 4.1 at the beam end passes through the gap between the column longitudinal reinforcement 21 and the column transverse reinforcement 22 outside the steel pipe 1; the continuous reinforcement 4.1 at the beam end passes through the steel pipe opening 6; the beam transverse reinforcement 5 wraps the outer steel connector 10 and the beam longitudinal reinforcement 4.2 at the beam end position; the outer steel connector 10 includes a flange 10.1 and a web 10.2; the flange 10.1 includes an upper flange 10.1.1 and a lower flange 10.1.2; the flange 10.1 is connected to the beam end discontinuous reinforcement 4.2 by welding or lap splicing; the column longitudinal reinforcement 21 and the column transverse reinforcement 22 form a column reinforcement cage and wrap the steel pipe 1, and the concrete 23 outside the pipe wraps the column reinforcement cage.
[0007] Preferably, the steel pipe 1 has an upper opening 6.1 at the position corresponding to the upper continuous reinforcing bar 4.1.1 at the beam end and / or a lower opening 6.2 at the position corresponding to the lower continuous reinforcing bar 4.1.2 at the beam end; the upper continuous reinforcing bar 4.1.1 at the beam end passes through the upper opening 6.1; the upper discontinuous reinforcing bar 4.2.1 at the beam end is located in the area corresponding to the column steel pipe 1 and is connected to the outer steel connector 10; the lower continuous reinforcing bar 4.1.2 at the beam end passes through the lower opening 6.2.
[0008] Preferably, the steel pipe opening 6 has a reinforcing member 13, which is fixedly connected to the steel pipe 1; the reinforcing member 13 is a reinforcing ring and / or a reinforcing plate. Alternatively, the thickness of the steel pipe wall around the steel pipe opening 6 is greater than the thickness of the steel pipe wall in the column area.
[0009] Preferably, the steel pipe opening 6 is located at the corner area where the beam and the steel pipe intersect; the vertical dimension of the steel pipe opening 6 is greater than the horizontal dimension; the continuous reinforcing bars 4.1 at the beam end are combined together and pass through the steel pipe opening 6.
[0010] Preferably, the inner side of the steel pipe 1 has an inner steel connector 7; the inner steel connector 7 is arranged corresponding to the outer steel connector 10 and is fixedly connected to the steel pipe 1; the inner steel connector 7 includes a transverse connecting steel plate 7.1 and a vertical connecting steel plate 7.2; the transverse connecting steel plate 7.1 is arranged corresponding to the flange 10.1 of the outer steel connector 10.
[0011] Preferably, a sleeve 12 is provided at the non-continuous reinforcing bar 4.2 at the beam end of the steel pipe 1; one end of the sleeve 12 is fixedly connected to the steel pipe 1, and the other end is fixedly connected to the non-continuous reinforcing bar 4.2 at the beam end.
[0012] Preferably, the steel pipe 1 contains longitudinal reinforcing bars 8 and / or transverse reinforcing bars 9; the longitudinal reinforcing bars 8 and transverse reinforcing bars 9 form a reinforcing cage.
[0013] Preferably, the reinforced concrete beam B contains a steel frame 11; the steel frame 11 is enclosed by the longitudinal reinforcement 4 and the transverse reinforcement 5 of the beam, and is fixedly connected to the outer steel connector 10.
[0014] A construction method for a composite steel-concrete composite column connection structure includes the following steps:
[0015] Step 1: Install and fix the prefabricated steel pipe component 1 in the factory;
[0016] Among them, the main body of steel pipe 1 has a steel pipe opening 6 at the position of continuous steel bar connection at the end of the structural beam to be installed, and the main body of steel pipe 1 is fixedly connected with outer steel connector 10 and inner steel connector 3.
[0017] The prefabrication of the main body of steel pipe component 1 in the factory includes the following steps:
[0018] Step 1, Prepare raw materials: including steel plates and structural steel materials.
[0019] Step 2, Steel straightening: Straighten the steel plates and sections.
[0020] Step 3, Layout: This includes laying out the steel plates, structural steel, holes, internal steel connectors, and external steel connectors according to the design requirements.
[0021] Step 4, Cutting: Cut the steel plate, steel section, holes, inner steel connectors, and outer steel connectors according to the layout positions in Step 3.
[0022] Step 5: Weld the steel plates, structural steel, holes, inner steel connectors, and outer steel connectors.
[0023] Step 6: Straighten the welded steel pipe column body. The processing is now complete.
[0024] In step one, when a reinforcing cage is installed in the composite steel pipe concrete column, the reinforcing cage is fabricated as a whole with the main body of the steel pipe column in the factory.
[0025] Step 2: Tie the longitudinal reinforcement 21 and the transverse reinforcement 22 of the column;
[0026] Step 3: Erect column formwork;
[0027] Step 4: Pour the concrete 23 outside the pipe and / or the concrete 22 inside the pipe, and cure it to the predetermined strength;
[0028] Step 5: Tie the longitudinal reinforcement 4 and transverse reinforcement 5 of the beam, connect the outer steel connector 10 to the discontinuous reinforcement 4.2 at the beam end, and pass the continuous reinforcement 4.1 at the beam end through the steel pipe opening 6 and the gap between the outer reinforcement of the column;
[0029] Step 6: Erect the beam formwork;
[0030] Step 7: Pour concrete for the columns and / or beams and cure to the predetermined strength.
[0031] Compared with the prior art, the present invention has the following features and beneficial effects.
[0032] 1. In this invention, the continuous reinforcing bars at the beam end are directly connected through the reinforced concrete portion outside the composite steel tube column, the external steel connectors, and the discontinuous reinforcing bars at the beam end, effectively reducing or avoiding the need for the reinforcing bars to be pierced in the steel tube, and improving the shear and bending bearing capacity and ductility of the column in the joint area.
[0033] 2. In this invention, the partial openings in the steel-concrete composite column, combined with steel connectors, are designed with a longer vertical direction and a shorter horizontal direction. Reinforced concrete beams can pass through the steel pipe openings using a parallel reinforcement method. This facilitates concrete pouring and reduces on-site welding of the reinforcing bars to the external steel connectors. It improves the quality of concrete pouring in the joint area of the steel-concrete composite column, thereby enhancing the joint's load-bearing capacity and ductility; furthermore, it reduces on-site welding, improving construction quality and mechanical properties.
[0034] 3. In this invention, longitudinal and transverse reinforcing bars are installed inside the steel pipe to improve the bearing capacity and ductility of the composite steel-concrete composite column. Attached Figure Description
[0035] The present invention will now be described in further detail with reference to the accompanying drawings.
[0036] Figure 1 Top view of the connection between the composite steel-concrete composite column and the reinforced concrete beam Figure 1 .
[0037] Figure 2 A schematic front section of the connection between the composite steel-concrete composite column and the reinforced concrete beam. Figure 1 .
[0038] Figure 3 Top view of the connection between the composite steel-concrete composite column and the reinforced concrete beam Figure 2 .
[0039] Figure 4 A schematic front section of the connection between the composite steel-concrete composite column and the reinforced concrete beam. Figure 2 .
[0040] Figure 5 This is a schematic elevation view of the connection between the composite steel-concrete composite column and the reinforced concrete beam.
[0041] Figure 6 This is a top view of a composite steel-concrete composite column with steel reinforcement inside the beam.
[0042] Figure reference numerals: A – Composite steel-concrete composite column; B – Reinforced concrete beam; 1 – Steel pipe; 2 – Concrete inside the pipe; 3 – Beam concrete; 4 – Longitudinal reinforcement of the beam; 4.1 – Continuous reinforcement at the beam end; 4.1.1 – Upper continuous reinforcement at the beam end; 4.1.2 – Lower continuous reinforcement at the beam end; 4.2 – Discontinuous reinforcement at the beam end; 4.2.1 – Upper discontinuous reinforcement at the beam end; 4.2.2 – Lower discontinuous reinforcement at the beam end; 5 – Transverse reinforcement of the beam; 6 – Steel pipe opening; 6.1 – 6.2 - Lower opening, 7 - Inner steel connector, 7.1 - Transverse connecting steel plate, 7.2 - Vertical connecting steel plate, 8 - Longitudinal reinforcement inside the steel pipe, 9 - Transverse reinforcement inside the steel pipe, 10 - Outer steel connector, 10.1 - Flange, 10.1.1 - Upper flange, 10.1.2 - Lower flange, 10.2 - Web, 11 - Steel frame, 12 - Sleeve, 13 - Reinforcing member, 21 - Longitudinal reinforcement of column, 22 - Transverse reinforcement of column, 23 - Concrete outside the pipe.
[0043] To better understand the purpose, technical solution, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings. Here, illustrative embodiments and their descriptions are used to explain the invention, but are not intended to limit the invention.
[0044] In the description of this invention, it should be understood that the terms "comprising / including," "consisting of," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrase "comprising / including…" or "consisting of…" does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.
[0045] In this invention, unless otherwise explicitly specified and limited, the term "fixed connection" should be interpreted broadly, for example, it can refer to a sleeve connection, an lap joint, a weld, a bolted connection, or a combination of the above connections; the terms "installation," "connection," and "linking" should also be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components; the term "continuous reinforcing bar" refers to a reinforcing bar that is continuous without breakage, or a reinforcing bar that is broken but with a fixed connection between the broken reinforcing bars. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0046] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of the present invention.
[0047] The implementation of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
[0048] like Figure 1 and Figure 2 As shown, a composite steel-concrete composite column connection structure includes a composite steel-concrete composite column A, a reinforced concrete beam B, and an external steel connector 10. The composite steel-concrete composite column A includes a steel pipe 1, concrete inside the pipe 2, longitudinal reinforcement 21, transverse reinforcement 22, and concrete outside the pipe 23. The reinforced concrete beam B includes concrete 3, longitudinal reinforcement 4, and transverse reinforcement 5. The longitudinal reinforcement 4 includes continuous reinforcement 4.1 at the beam end and discontinuous reinforcement 4.2 at the beam end. The external steel connector 10 is located outside the steel pipe 1 and is arranged correspondingly to the reinforced concrete beam B. One end is fixedly connected to the steel pipe 1, and the other end is connected to the discontinuous reinforcement 4.2 at the beam end. The concrete inside the pipe 2 fills the steel pipe 1.
[0049] This invention eliminates the need for perforations in the steel pipe, allowing the steel pipe column to pass continuously through the joint. This avoids the weakening of the steel pipe's cross-section in the joint area by numerous perforations, which are common in engineering projects, and reduces the steel pipe's bending and shear bearing capacity. The external steel connectors, connected to the discontinuous reinforcement at the beam end, can transfer the bending moment and shear force of the discontinuous reinforcement section to the steel pipe, reducing or eliminating the need for perforations in the discontinuous reinforcement.
[0050] like Figure 3 and Figure 4 As shown, the continuous beam end reinforcement 4.1 of the present invention includes an upper continuous beam end reinforcement 4.1.1 and a lower continuous beam end reinforcement 4.1.2; the discontinuous beam end reinforcement 4.2 includes an upper discontinuous beam end reinforcement 4.2.1 and a lower discontinuous beam end reinforcement 4.2.2; the continuous beam end reinforcement 4.1 passes through the gap between the column longitudinal reinforcement 21 and the column transverse reinforcement 22 outside the steel pipe 1; the continuous beam end reinforcement 4.1 passes through the steel pipe opening 6; the steel pipe opening 6 is located at the corner of the steel pipe; the beam... The transverse reinforcement 5 wraps the outer steel connector 10 and the longitudinal reinforcement 4.2 at the beam end; the outer steel connector 10 includes a flange 10.1 and a web 10.2; the flange 10.1 includes an upper flange 10.1.1 and a lower flange 10.1.2; the flange 10.1 is connected to the discontinuous reinforcement 4.2 at the beam end by welding or lap splicing; the column longitudinal reinforcement 21 and the column transverse reinforcement 22 form a column reinforcement cage and wrap the steel pipe 1, and the concrete 23 outside the pipe wraps the column reinforcement cage.
[0051] Preferably, the steel pipe 1 has an upper opening 6.1 at the position corresponding to the upper continuous reinforcing bar 4.1.1 at the beam end, and a lower opening 6.2 at the position corresponding to the lower continuous reinforcing bar 4.1.2 at the beam end; the upper continuous reinforcing bar 4.1.1 at the beam end passes through the upper opening 6.1; the upper discontinuous reinforcing bar 4.2.1 at the beam end is located in the area corresponding to the column steel pipe 1 and is connected to the outer steel connector 10; the lower continuous reinforcing bar 4.1.2 at the beam end passes through the lower opening 6.2.
[0052] Preferably, the steel pipe opening 6 is located at the corner area where the beam and the steel pipe intersect; the vertical dimension of the steel pipe opening 6 is greater than its horizontal dimension; the continuous reinforcing bars 4.1 at the beam end are combined and pass through the steel pipe opening 6. The opening dimensions are greater than 20mm and less than 300mm in the length direction and greater than 10mm and less than 50mm in the short side direction. One opening is provided in each corner area.
[0053] Preferably, the inner side of the steel pipe 1 has an inner steel connector 7, the position of which corresponds to the outer steel connector 10 and is fixedly connected to the steel pipe 1; the inner steel connector 7 includes a transverse connecting steel plate 7.1 and a vertical connecting steel plate 7.2; the transverse connecting steel plate 7.1 is arranged corresponding to the flange 10.1 of the outer steel connector 10.
[0054] In this invention, a portion of the continuous reinforcing bars at the beam end passes through the gap between the longitudinal and transverse reinforcing bars of the column in the concrete portion outside the steel pipe. This portion of the continuous reinforcing bars does not require holes in the steel pipe, reducing the need for openings. For the portion of the continuous reinforcing bars at the beam end within the corresponding range of the steel pipe, openings are made at the corners of the steel pipe. These openings are flat, with their major axis aligned with the axial direction of the steel pipe, and are elliptical, rectangular, or a combination of circles and rectangles, minimizing weakening of the steel pipe cross-section. The internal steel connectors enhance the external stiffness of the steel pipe column in the beam-column joint area, effectively transferring bending moments and shear forces from the external steel connectors or discontinuous reinforcing bars, and also transferring forces to the internally poured concrete.
[0055] like Figure 5 As shown, in this invention, the steel pipe opening 6 has a reinforcing member 13, which is fixedly connected to the steel pipe 1; the reinforcing member 13 is a reinforcing ring and / or a reinforcing plate.
[0056] Preferably, a sleeve 12 is provided at the non-continuous reinforcing bar 4.2 at the beam end of the steel pipe 1; one end of the sleeve 12 is fixedly connected to the steel pipe 1, and the other end is fixedly connected to the non-continuous reinforcing bar 4.2 at the beam end.
[0057] The reinforcement further improves the mechanical properties of the steel pipe after local openings. A sleeve can be installed to further reduce the amount of holes in the steel pipe and on-site welding.
[0058] like Figure 6As shown, in this invention, the steel pipe 1 contains longitudinal reinforcing bars 8 and / or transverse reinforcing bars 9; the longitudinal reinforcing bars 8 and transverse reinforcing bars 9 form a reinforcing cage.
[0059] The reinforced concrete beam B contains a steel frame 11; the steel frame 11 is enclosed by the longitudinal reinforcement 4 and the transverse reinforcement 5 of the beam, and is fixedly connected to the outer steel connector 10.
[0060] A steel cage is installed inside the steel pipe to further enhance the load-bearing capacity and ductility of the steel pipe. Steel reinforcement is installed inside the beam to enhance the load-bearing capacity and ductility of the beam, and the number of longitudinal steel bars passing through the steel pipe can be reduced.
[0061] In this invention, preferably, the thickness of the steel pipe 1 is not less than 3 mm.
[0062] Preferably, the steel pipe 1 has a stud inside, and the stud is fixedly connected to the steel pipe 1.
[0063] As a preferred option, the continuous reinforcement at the beam end 4.1 is a reinforcement that runs the length of the node and is continuously stressed; the continuous length means that the reinforcement is uninterrupted, or is connected by welding, sleeve connection, or lap splice.
[0064] As a preferred embodiment, the steel pipe 1 has a lower opening 6.2 at the position corresponding to the lower continuous reinforcing bar 4.1.2 at the beam end; the lower continuous reinforcing bar 4.1.2 at the beam end is inserted into the lower opening 6.2 and then broken or remains in its entirety.
[0065] Preferably, the diameter of the steel pipe opening 6 is at least 2mm larger than the diameter of the reinforcing bar, but not more than 10% of the steel pipe diameter; on the same cross section, the cumulative diameter of the openings does not exceed 50% of the steel pipe diameter. This facilitates construction.
[0066] Preferably, the thickness of the steel pipe wall around the steel pipe opening 6 is greater than the thickness of the steel pipe wall in the column area, and the thickening thickness is not less than 1mm.
[0067] Furthermore, the steel pipe 1 is equipped with a floor slab connector; the floor slab connector is located at the corresponding position on the floor slab and is fixedly connected to the steel pipe 1 for connecting the horizontal floor slab.
[0068] A construction method for a composite steel-concrete composite column connection structure includes the following steps:
[0069] Step 1: Install and fix the prefabricated steel pipe component 1 in the factory;
[0070] Among them, the main body of steel pipe 1 has a steel pipe opening 6 at the position of continuous steel bar connection at the end of the structural beam to be installed, and the main body of steel pipe 1 is fixedly connected with outer steel connector 10 and inner steel connector 3.
[0071] The prefabrication of the main body of steel pipe component 1 in the factory includes the following steps:
[0072] Step 1, Prepare raw materials: including steel plates and structural steel materials.
[0073] Step 2, Steel straightening: Straighten the steel plates and sections.
[0074] Step 3, Layout: This includes laying out the steel plates, structural steel, holes, internal steel connectors, and external steel connectors according to the design requirements.
[0075] Step 4, Cutting: Cut the steel plate, steel section, holes, inner steel connectors, and outer steel connectors according to the layout positions in Step 3.
[0076] Step 5: Weld the steel plates, structural steel, holes, inner steel connectors, and outer steel connectors.
[0077] Step 6: Straighten the welded steel pipe column body. The processing is now complete.
[0078] In step one, when a reinforcing cage is installed in the composite steel pipe concrete column, the reinforcing cage is fabricated as a whole with the main body of the steel pipe column in the factory.
[0079] Step 2: Tie the longitudinal reinforcement 21 and the transverse reinforcement 22 of the column;
[0080] Step 3: Erect column formwork;
[0081] Step 4: Pour the concrete 23 outside the pipe and / or the concrete 22 inside the pipe, and cure it to the predetermined strength;
[0082] Step 5: Tie the longitudinal reinforcement 4 and transverse reinforcement 5 of the beam, connect the outer steel connector 10 to the discontinuous reinforcement 4.2 at the beam end, and pass the continuous reinforcement 4.1 at the beam end through the steel pipe opening 6 and the gap between the outer reinforcement of the column;
[0083] Step 6: Erect the beam formwork;
[0084] Step 7: Pour concrete for the columns and / or beams and cure to the predetermined strength.
[0085] The specific embodiments are as described, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.
Claims
1. A composite steel-concrete composite column connection structure, characterized in that: The system includes a composite steel-concrete composite column (A), a reinforced concrete beam (B), and an external steel connector (10). The composite steel-concrete composite column (A) includes a steel pipe (1), concrete inside the pipe (2), longitudinal reinforcement (21), transverse reinforcement (22), and concrete outside the pipe (23). The reinforced concrete beam (B) includes beam concrete (3), longitudinal reinforcement (4), and transverse reinforcement (5). The longitudinal reinforcement (4) includes continuous reinforcement (4.1) and discontinuous reinforcement (4.2) at the beam end. The external steel connector (10) is located outside the steel pipe (1) and is arranged corresponding to the reinforced concrete beam (B). One end is fixedly connected to the steel pipe (1), and the other end is connected to the discontinuous reinforcement (4.2) at the beam end. The concrete inside the pipe (2) fills the steel pipe (1).
2. The composite steel-concrete composite column connection structure according to claim 1, characterized in that: The continuous reinforcement (4.1) at the beam end includes the upper continuous reinforcement (4.1.1) and the lower continuous reinforcement (4.1.2) at the beam end; the discontinuous reinforcement (4.2) at the beam end includes the upper discontinuous reinforcement (4.2.1) and the lower discontinuous reinforcement (4.2.2) at the beam end; the continuous reinforcement (4.1) at the beam end passes through the gap between the longitudinal reinforcement (21) and the transverse reinforcement (22) of the column outside the steel pipe (1); the continuous reinforcement (4.1) at the beam end passes through the opening (6) of the steel pipe; the transverse reinforcement (5) at the beam end... The outer steel connector (10) and the longitudinal reinforcement (4.2) of the beam are placed. The outer steel connector (10) includes a flange (10.1) and a web (10.2). The flange (10.1) includes an upper flange (10.1.1) and a lower flange (10.1.2). The flange (10.1) is connected to the discontinuous reinforcement (4.2) at the beam end by welding or lap splicing. The longitudinal reinforcement (21) and the transverse reinforcement (22) of the column form a column reinforcement cage and wrap the steel pipe (1). The concrete (23) outside the pipe wraps the column reinforcement cage.
3. The composite steel-concrete composite column connection structure according to claim 2, characterized in that: The steel pipe (1) has an upper opening (6.1) at the position corresponding to the upper continuous reinforcing bar (4.1.1) at the beam end and / or a lower opening (6.2) at the position corresponding to the lower continuous reinforcing bar (4.1.2) at the beam end; the upper continuous reinforcing bar (4.1.1) at the beam end passes through the upper opening (6.1); the upper discontinuous reinforcing bar (4.2.1) at the beam end is located in the area corresponding to the column steel pipe (1) and is connected to the outer steel connector (10); the lower continuous reinforcing bar (4.1.2) at the beam end passes through the lower opening (6.2).
4. The composite steel-concrete composite column connection structure according to claim 2, characterized in that: The steel pipe opening (6) has a reinforcing member (13), which is fixedly connected to the steel pipe (1); the reinforcing member (13) is a reinforcing ring and / or a reinforcing plate. Alternatively, the thickness of the steel pipe wall around the steel pipe opening (6) is greater than the thickness of the steel pipe wall in the column area.
5. The composite steel-concrete composite column connection structure according to claim 2, 3 or 4, characterized in that: The steel pipe opening (6) is located at the corner area where the beam and the steel pipe intersect; the vertical dimension of the steel pipe opening (6) is greater than the horizontal dimension; the continuous reinforcing bars (4.1) at the beam end are combined together and pass through the steel pipe opening (6).
6. The composite steel-concrete composite column connection structure according to claim 1, characterized in that: The inner side of the steel pipe (1) has an inner steel connector (7); the inner steel connector (7) is arranged in a position corresponding to the outer steel connector (10) and is fixedly connected to the steel pipe (1); the inner steel connector (7) includes a transverse connecting steel plate (7.1) and a vertical connecting steel plate (7.2); the transverse connecting steel plate (7.1) is arranged in a position corresponding to the flange (10.1) of the outer steel connector (10).
7. The composite steel-concrete composite column connection structure according to claim 1, characterized in that: A sleeve (12) is provided at the non-continuous reinforcing bar (4.2) at the beam end of the steel pipe (1); one end of the sleeve (12) is fixedly connected to the steel pipe (1), and the other end is fixedly connected to the non-continuous reinforcing bar (4.2) at the beam end.
8. The composite steel-concrete composite column connection structure according to claim 1, characterized in that: The steel pipe (1) contains longitudinal reinforcing bars (8) and / or transverse reinforcing bars (9); the longitudinal reinforcing bars (8) and transverse reinforcing bars (9) form a reinforcing cage.
9. The composite steel-concrete composite column connection structure according to claim 1, characterized in that: The reinforced concrete beam (B) contains a steel frame (11); the steel frame (11) is wrapped by the longitudinal steel bars (4) and the transverse steel bars (5) of the beam and is fixedly connected to the outer steel connector (10).
10. A construction method for a composite steel-concrete composite column connection structure, comprising the following steps. Step 1: Install and fix the prefabricated steel pipe (1) component in the factory. in, A steel pipe opening (6) is made on the main body of the steel pipe (1) component at the position of the continuous steel reinforcement connection at the end of the structural beam to be installed. An outer steel connector (10) and an inner steel connector (3) are fixedly connected on the main body of the steel pipe (1) component. The prefabrication of the main body of the steel pipe (1) component in the factory includes the following steps: Step 1, Prepare raw materials: including steel plates and structural steel materials. Step 2, Steel straightening: Straighten the steel plates and sections. Step 3, Layout: This includes laying out the steel plates, structural steel, holes, internal steel connectors, and external steel connectors according to the design requirements. Step 4, Cutting: Cut the steel plate, steel section, holes, inner steel connectors, and outer steel connectors according to the layout positions in Step 3. Step 5: Weld the steel plates, structural steel, holes, inner steel connectors, and outer steel connectors. Step 6: Straighten the welded steel pipe column body. The processing is now complete. In step one, when a reinforcing cage is installed in the composite steel pipe concrete column, the reinforcing cage is processed into one piece with the main body of the steel pipe column in the factory. Step 2: Tie the longitudinal reinforcement (21) and transverse reinforcement (22) of the column; Step 3: Erect column formwork; Step 4: Pour the concrete outside the pipe (23) and / or the concrete inside the pipe (22), and cure to the predetermined strength; Step 5: Tie the longitudinal reinforcement (4) and transverse reinforcement (5) of the beam. Connect the outer steel connector (10) to the discontinuous reinforcement (4.2) at the beam end. The continuous reinforcement (4.1) at the beam end passes through the steel pipe opening (6) and the gap between the outer reinforcement of the column. Step 6: Erect the beam formwork; Step 7: Pour concrete for the columns and / or beams and cure to the predetermined strength.