A rigid connection joint for a composite column and its construction method

Abstract

The present invention relates to the technical field of building structures, and relates to a rigid connection joint of a composite column and its construction method, including a composite column, a cast-in-place concrete beam, a steel box girder and an H-shaped steel beam. The composite column includes a core steel pipe and an outer steel pipe of the composite column sleeved outside the core steel pipe. A plurality of vertical steel plates are evenly spaced along the circumferential direction between the outer steel pipe of the composite column and the core steel pipe. The two sides of the vertical steel plates are connected to the outer steel pipe of the composite column and the core steel pipe so that the composite column forms an integral body, and two horizontal outer ring plates are provided on the outer circumferential surface of the outer steel pipe of the composite column; the cast-in-place concrete beam, the steel box girder and the H-shaped steel beam are all arranged between the two horizontal outer ring plates, and are respectively fixedly connected to the outer steel pipe of the composite column and the two horizontal outer ring plates. The present invention provides a joint structure suitable for the rigid connection of a composite column with a steel box girder, a cast-in-place concrete beam and an H-shaped steel beam, meeting the force-bearing and construction quality requirements of complex connection joints under various working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of building structures, and relates to a rigid connection node of a composite column and a construction method thereof. Background Art

[0002] With the continuous development of the urbanization process in China, the quality requirements of urban construction for architectural creation are getting higher and higher. To meet novel and unique architectural designs, the combined form of cast-in-place structure and steel structure is used more and more, the node connections are becoming more and more complex, and the difficulty of node design and construction is increasing. Although concrete-filled steel tubular composite columns and steel reinforced concrete columns have been widely used in high-rise buildings, large industrial plants or other buildings that require the use of such connection nodes, significant economic benefits have been achieved. However, the existing connection nodes between concrete-filled steel tubular composite columns or steel reinforced concrete columns and other types of beams are usually complex in structure and inconvenient for construction, and it is difficult to meet the requirements of the mechanical properties and construction quality of such complex connections in various working conditions.

[0003] Since the existing connection methods and node structures are difficult to meet the requirements of the mechanical properties and construction quality of such complex connections in various working conditions, it is necessary to propose a new rigid connection node of a composite column applicable to the rigid connection between a composite column and a steel box girder, a cast-in-place concrete beam and an H-shaped steel beam and a construction method thereof. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a rigid connection node of a composite column and a construction method thereof to solve the problem that the existing connection methods and node structures are difficult to meet the mechanical properties and construction quality requirements of complex connections in various working conditions.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] On the one hand, the present invention provides a rigid connection node of a composite column, including a composite column, a cast-in-place concrete beam, a steel box girder and an H-shaped steel beam. The composite column includes a core steel pipe and a composite column outer steel pipe sleeved outside the core steel pipe. A plurality of vertical steel plates are uniformly arranged at intervals along the circumferential direction between the composite column outer steel pipe and the core steel pipe. The two sides of the vertical steel plates are connected to the composite column outer steel pipe and the core steel pipe so that the composite column forms an integral body, and two horizontal outer ring plates are arranged on the outer circumferential surface of the composite column outer steel pipe.

[0007] The cast-in-place concrete beam, the steel box girder and the H-shaped steel beam are all arranged between the two horizontal outer ring plates, and are respectively fixedly connected to the composite column outer steel pipe and the two horizontal outer ring plates.

[0008] The cast-in-place concrete beam includes H-shaped steel short corbels arranged along the axis of the cast-in-place concrete beam, longitudinal steel bars of the cast-in-place concrete beam, and cast-in-place concrete. One end of the web and flange of the H-shaped steel short corbel is welded to the outer circumferential surface of the outer steel pipe of the composite column, and the longitudinal steel bars of the cast-in-place concrete beam are welded to the H-shaped steel short corbel;

[0009] The webs of the steel box girder and the H-shaped steel beam are welded to the outer circumferential surface of the outer steel pipe of the composite column, and the flanges of the webs of the steel box girder and the H-shaped steel beam are welded to the horizontal outer ring plate.

[0010] Furthermore, the flange of the H-shaped steel short corbel is welded to the horizontal outer ring plate.

[0011] Furthermore, the horizontal outer ring plate is connected to the outer steel pipe of the composite column by welding.

[0012] Furthermore, first stud bolts are provided on the upper surfaces of the cast-in-place concrete beam, the steel box girder, and the H-shaped steel beam to connect the floor slab.

[0013] Furthermore, there is composite column steel pipe concrete in the gap between the outer steel pipe of the composite column and the core steel pipe.

[0014] Furthermore, a number of second stud bolts arranged radially along the inner circumferential surface of the outer steel pipe of the composite column are provided to strengthen the connection between the outer steel pipe of the composite column and the composite column steel pipe concrete.

[0015] Furthermore, the cast-in-place concrete beam includes a first cast-in-place concrete beam and a second cast-in-place concrete beam arranged oppositely.

[0016] Furthermore, the vertical steel plate is welded to both the outer steel pipe of the composite column and the core steel pipe.

[0017] On the other hand, the present invention also provides a construction method for the rigid connection joint of the composite column, using the above-mentioned rigid connection joint of the composite column, which specifically includes the following steps:

[0018] S1. Weld a number of vertical steel plates between the outer steel pipe of the composite column and the core steel pipe, and both sides of the vertical steel plate are connected to the outer steel pipe of the composite column and the core steel pipe respectively;

[0019] S2. Weld two horizontal outer ring plates up and down on the outer circumferential surface of the outer steel pipe of the composite column;

[0020] S3. Weld the H-shaped steel short corbel and the H-shaped steel beam to the edge of the horizontal outer ring plate and the outer circumferential surface of the outer steel pipe of the composite column;

[0021] S4. Weld the steel box girder to the edge of the horizontal outer ring plate and the outer circumferential surface of the outer steel pipe of the composite column;

[0022] S5. Weld a number of first stud bolts on the upper surfaces of the horizontal outer ring plate, the short H-shaped steel bracket, the H-shaped steel beam and the steel box girder to connect the floor slab;

[0023] S6. Bind the longitudinal steel bars and stirrups of the cast-in-place concrete beam, and weld the longitudinal steel bars of the cast-in-place concrete beam to the horizontal outer ring plate and the outer steel pipe of the composite column;

[0024] S7. Pour concrete for the composite column, the cast-in-place concrete beam and the floor slab. The concrete used for pouring is required to have a limit expansion rate of ≥0.030% in 14 days.

[0025] Further, in step S5, it also includes welding a number of second stud bolts arranged radially along the inner circumferential surface of the outer steel pipe of the composite column;

[0026] In step S7, it also includes arranging longitudinal steel bars of concrete-filled steel pipe for the composite column between the core steel pipe and the outer steel pipe of the composite column.

[0027] The beneficial effects of the present invention are as follows:

[0028] A composite column rigid connection joint and its construction method provided by the present invention provide a joint structure suitable for the rigid connection of composite columns with steel box girders, cast-in-place concrete beams and H-shaped steel beams, meeting the force and construction quality requirements of complex connection joints under various working conditions; the composite column rigid connection joint is provided with a number of vertical steel plates evenly spaced circumferentially between the outer steel pipe and the core steel pipe of the composite column within the height range of the joint area, without the need to set horizontal stirrups, so as to ensure that the longitudinal steel bars of the composite column can be continuous at the joint, so that when the steel structure members in the cast-in-place concrete beam, the steel box girder and the H-shaped steel beam are directly welded to the outer circumferential surface of the outer steel pipe of the composite column, the stability, reliability and concrete pouring construction quality of the composite column rigid connection joint can be guaranteed, and since there is no need to perform perforated welding treatment on the outer steel pipe of the composite column, the construction difficulty is effectively reduced and the construction period is shortened.

[0029] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0031] Figure 1 is a structural schematic diagram of a composite column rigid connection joint in this embodiment;

[0032] Figure 2 is Figure 1 the sectional view taken along the A-A section in

[0033] Figure 3 is Figure 1 the sectional view taken along the B-B section in

[0034] Figure 4 is Figure 2 the sectional view taken along the Ⅰ-Ⅰ section in

[0035] Figure 5 is Figure 3 the sectional view taken along the Ⅱ-Ⅱ section in

[0036] Figure 6 is Figure 3 the sectional view taken along the Ⅲ-Ⅲ section in

[0037] Reference numerals: 1 - the first cast-in-place concrete beam, 2 - the second cast-in-place concrete beam, 3 - the H-shaped steel beam, 4 - the steel box girder, 5 - the first short H-shaped steel bracket, 6 - the second short H-shaped steel bracket, 7 - the horizontal outer ring plate, 8 - the outer steel pipe of the composite column, 9 - the vertical steel plate, 10 - the longitudinal reinforcement of the cast-in-place concrete beam, 11 - the longitudinal reinforcement of the concrete-filled steel tube of the composite column, 12 - the first stud, 13 - the core steel pipe, 14 - the second stud, 15 - the concrete-filled steel tube of the composite column, 16 - the connecting plate, 17 - the floor slab, 18 - the stirrup. Detailed implementation manners

[0038] The following specific examples illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following examples only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following examples and the features in the examples can be combined with each other.

[0039] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0040] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] Please refer to Figures 1 to 6 , which is a rigid connection joint for a composite column. This rigid connection joint for a composite column is applicable to the rigid connection between a composite column and a steel box girder 4, a cast-in-place concrete beam, and an H-shaped steel beam 3. It includes a composite column, a cast-in-place concrete beam, a steel box girder 4, and an H-shaped steel beam 3. The composite column includes a core steel pipe 13 and an outer steel pipe 8 of the composite column sleeved outside the core steel pipe 13. The key lies in that a plurality of vertical steel plates 9 are evenly spaced along the circumferential direction between the outer steel pipe 8 of the composite column and the core steel pipe 13, and both sides of the vertical steel plates 9 are connected to the outer steel pipe 8 of the composite column and the core steel pipe 13 by welding.

[0042] On the outer circumferential surface of the outer steel pipe 8 of the composite column, there are two horizontally arranged horizontal outer ring plates 7 up and down, and they are connected by welding. The cast-in-place concrete beam, the steel box girder 4, and the H-shaped steel beam 3 are all arranged between the two horizontally arranged horizontal outer ring plates 7.

[0043] Preferably, the height of the vertical steel plate 9 is greater than the height of the interval between the two horizontally arranged horizontal outer ring plates 7, and both ends of the vertical steel plate 9 are respectively located on the upper and lower sides of the two horizontally arranged horizontal outer ring plates 7 to ensure the stability of the force of this rigid connection joint for a composite column.

[0044] Among them, the cast-in-place concrete beam includes a first cast-in-place concrete beam 1 and a second cast-in-place concrete beam 2 arranged oppositely. The cast-in-place concrete beam includes an H-shaped steel short bracket arranged along the axis of the cast-in-place concrete beam, longitudinal steel bars 10 of the cast-in-place concrete beam, and cast-in-place concrete. One end of the web and flange of the H-shaped steel short bracket and one end of the longitudinal steel bars 10 of the cast-in-place concrete beam are all welded to the outer steel pipe 8 of the composite column, and the other end is inserted into the cast-in-place concrete. Moreover, the flange of the H-shaped steel short bracket is welded to the edge of the horizontal outer ring plate 7 to achieve the rigid connection between the cast-in-place concrete beam and the composite column. Specifically, the H-shaped steel short brackets in the first cast-in-place concrete beam 1 and the second cast-in-place concrete beam 2 are respectively a first H-shaped steel short bracket 5 and a second H-shaped steel short bracket 6.

[0045] Preferably, the longitudinal reinforcing bars 10 of the cast-in-place concrete beam in the cast-in-place concrete beam are welded to the short H-shaped steel bracket to further enhance the stability of the connection between the longitudinal reinforcing bars 10 of the cast-in-place concrete beam and the composite column.

[0046] Specifically, in actual construction, the cast-in-place concrete beam further includes stirrups 18 sleeved on the longitudinal reinforcing bars 10 of the cast-in-place concrete beam.

[0047] One end of the web and flange of the H-shaped steel beam 3 is welded to the outer steel pipe 8 of the composite column, and the flange of the H-shaped steel beam 3 is welded to the edge of the horizontal outer ring plate 7 to achieve the rigid connection between the H-shaped steel beam 3 and the composite column.

[0048] One end of the steel box girder 4 (i.e., one end of the web and flange of the steel box girder 4) is welded to the outer circumferential surface of the outer steel pipe 8 of the composite column, and its upper and lower sides are respectively welded to the edges of the upper and lower horizontal outer ring plates 7 to achieve the rigid connection between the steel box girder 4 and the composite column. In actual construction, the web of the steel box girder 4 can be adjusted adaptively to ensure the welding angle.

[0049] Specifically, in actual construction, a number of connecting plates 16 are provided on the outer side of the steel box girder 4. The two ends of the connecting plate 16 are respectively welded to the upper and lower horizontally arranged horizontal outer ring plates 7, and one side of it is welded to the outer side of the steel box girder 4 to ensure the force stability of the horizontal outer ring plate 7 in the area where the steel box girder 4 is located.

[0050] The first stud 12 is arranged on the upper surface of the upper horizontal outer ring plate 7, H-shaped steel beam 3, upper flange of the steel box girder 4 and the cast-in-place concrete beam, for connecting with the floor slab 17. The first stud 12 is also arranged on the surface of the flange of the short H-shaped steel bracket for strengthening the connection with the cast-in-place concrete beam.

[0051] Specifically, the gap between the outer steel pipe 8 of the composite column and the core steel pipe 13 and the core steel pipe 13 are both provided with the composite column steel pipe concrete 15. The composite column steel pipe concrete longitudinal reinforcing bars 11 arranged along the axial direction of the core steel pipe 13 are arranged between the vertical steel plates 9. Thus, no horizontal stirrups are provided between the outer steel pipe and the core steel pipe of the composite column within the height range of the joint area, and the composite column steel pipe concrete longitudinal reinforcing bars 11 are continuously arranged within the joint area without being interrupted, ensuring the mechanical properties of the composite column.

[0052] Preferably, a number of second studs 14 arranged along the radial direction are arranged on the inner circumferential surface of the outer steel pipe 8 of the composite column to strengthen the connection between the outer steel pipe 8 of the composite column and the composite column steel pipe concrete 15.

[0053] The construction process of the rigid connection joint of the composite column includes the following steps:

[0054] 1) Weld the vertical steel plates 9 between the outer steel pipe 8 and the core steel pipe 13 of the composite column to the outer steel pipe 8 and the core steel pipe 13 of the composite column respectively;

[0055] 2) Weld the horizontal outer ring plate 7 to the outer circumferential surface of the outer steel pipe 8 of the composite column;

[0056] 3) Weld both the H-shaped steel short bracket and the H-shaped steel beam 3 to the edge of the horizontal outer ring plate 7 and the outer circumferential surface of the outer steel pipe 8 of the composite column;

[0057] 4) Weld the steel box girder 4 to the edge of the horizontal outer ring plate 7 and the outer circumferential surface of the outer steel pipe 8 of the composite column;

[0058] 5) Weld a number of first stud bolts 12 on the upper surfaces of the horizontal outer ring plate 7, the H-shaped steel short bracket, the H-shaped steel beam 3 and the steel box girder 4 to connect the floor slab 17, and weld a number of second stud bolts 14 arranged radially on the inner circumferential surface of the outer steel pipe 8 of the composite column;

[0059] 6) Arrange longitudinal steel bars 11 of the composite column steel pipe concrete between the core steel pipe 13 and the outer steel pipe 8 of the composite column;

[0060] 7) Bind the longitudinal steel bars 10 of the cast-in-place concrete beam and the stirrups 18 of the cast-in-place concrete beam, and weld the longitudinal steel bars 10 of the cast-in-place concrete beam to the connection part of the horizontal outer ring plate 7 and the outer steel pipe 8 of the composite column;

[0061] 8) Pour concrete for the composite column, the cast-in-place concrete beam and the floor slab 17. The concrete used for pouring is required to have a 14-day limited expansion rate ≥ 0.030%.

[0062] A rigid connection joint of a composite column provided in this embodiment provides a joint structure suitable for the rigid connection of a composite column with a steel box girder 4, a cast-in-place concrete beam and an H-shaped steel beam 3 to meet the force and construction quality requirements of complex connection joints under various working conditions. The rigid connection joint of the composite column is provided with a number of vertical steel plates 9 evenly spaced circumferentially between the outer steel pipe 8 and the core steel pipe 13 within the height range of the joint area, and no horizontal stirrups 18 are required to ensure that the longitudinal steel bars of the composite column can be continuous at the joint. Thus, when the steel structural members in the cast-in-place concrete beam, the steel box girder 4 and the H-shaped steel beam 3 are directly welded to the outer circumferential surface of the outer steel pipe 8 of the composite column, the stability and reliability of the rigid connection joint of the composite column and the quality of concrete pouring construction can be ensured. And because there is no need to perforate the outer steel pipe 8 of the composite column, the construction difficulty is effectively reduced and the construction period is shortened.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A rigid connection joint for a composite column, characterized in that: It includes composite columns, cast-in-place concrete beams, steel box girders (4) and H-shaped steel beams (3). The composite column includes a core steel pipe (13) and an outer steel pipe (8) of the composite column sleeved outside the core steel pipe (13). A number of vertical steel plates (9) are evenly spaced along the circumferential direction between the outer steel pipe (8) of the composite column and the core steel pipe (13). Both sides of the vertical steel plate (9) are connected to the outer steel pipe (8) of the composite column and the core steel pipe (13) so that the composite column forms an integral body, and two horizontal outer ring plates (7) are provided on the outer circumferential surface of the outer steel pipe (8) of the composite column; The cast-in-place concrete beam, the steel box girder (4) and the H-shaped steel beam (3) are all arranged between the two upper and lower horizontal outer ring plates (7), and are respectively fixedly connected to the outer steel pipe (8) of the composite column and the two upper and lower horizontal outer ring plates (7); The cast-in-place concrete beam includes H-shaped steel short corbels arranged along the axis of the cast-in-place concrete beam, longitudinal steel bars (10) of the cast-in-place concrete beam and cast-in-place concrete. One end of the web and flange of the H-shaped steel short corbel are welded to the outer circumferential surface of the outer steel pipe (8) of the composite column, and the longitudinal steel bars (10) of the cast-in-place concrete beam are welded to the H-shaped steel short corbel; The webs of the steel box girder (4) and the H-shaped steel beam (3) are welded to the outer circumferential surface of the outer steel pipe (8) of the composite column, and the flanges of the steel box girder (4) and the H-shaped steel beam (3) are welded to the horizontal outer ring plate (7).

2. The rigid connection joint of the composite column according to claim 1, characterized in that: The flange of the H-shaped steel short corbel is welded to the horizontal outer ring plate (7).

3. The rigid connection joint of the composite column according to claim 1, characterized in that: The horizontal outer ring plate (7) is connected to the outer steel pipe (8) of the composite column by welding.

4. The rigid connection joint of the superposed column according to claim 1, characterized in that: First stud bolts (12) are provided on the upper surfaces of the cast-in-place concrete beam, the steel box girder (4) and the H-shaped steel beam (3) to connect the floor slab (17).

5. The rigid connection joint of the superposed column according to claim 1, characterized in that: Concrete-filled steel pipe of the composite column (15) is provided in the gap between the outer steel pipe (8) of the composite column and the core steel pipe (13).

6. The rigid connection joint of the composite column according to claim 5, characterized in that: A number of second stud bolts (14) arranged radially are arranged on the inner circumferential surface of the outer steel pipe (8) of the composite column to strengthen the connection between the outer steel pipe (8) of the composite column and the concrete-filled steel pipe of the composite column (15).

7. The rigid connection joint of the superposed column according to claim 1, characterized in that: The cast-in-place concrete beam includes a first cast-in-place concrete beam (1) and a second cast-in-place concrete beam (2) arranged oppositely.

8. The rigid connection joint of the superposed column according to claim 1, characterized in that: The vertical steel plate (9) is welded to both the outer steel pipe (8) of the composite column and the core steel pipe (13).

9. A construction method for a rigid connection joint of a composite column, characterized in that, Adopt the rigid connection joint of the composite column described in any one of claims 1 to 8, specifically including the following steps: S1. Weld a number of vertical steel plates (9) between the outer steel pipe (8) of the composite column and the core steel pipe (13), and both sides of the vertical steel plate (9) are respectively connected to the outer steel pipe (8) of the composite column and the core steel pipe (13); S2. Weld two upper and lower horizontal outer ring plates (7) on the outer circumferential surface of the outer steel pipe (8) of the composite column; S3. Weld the H-shaped steel short corbels and the H-shaped steel beam (3) to the edges of the horizontal outer ring plate (7) and the outer circumferential surface of the outer steel pipe (8) of the composite column; S4. Weld the steel box girder (4) to the edges of the horizontal outer ring plate (7) and the outer circumferential surface of the outer steel pipe (8) of the composite column; S5. Weld a number of first stud bolts (12) on the upper surfaces of the horizontal outer ring plate (7), the H-shaped steel short corbel, the H-shaped steel beam (3) and the steel box girder (4) to connect the floor slab (17); S6. Bind the longitudinal reinforcement bars (10) of the cast-in-place concrete beam and the stirrups (18) of the cast-in-place concrete beam, and weld the longitudinal reinforcement bars (10) of the cast-in-place concrete beam to the horizontal outer ring plate (7) and the outer steel pipe (8) of the composite column; S7. Pour concrete for the composite column, the cast-in-place concrete beam and the floor slab (17), and the concrete used for pouring is required to have a limit expansion rate of ≥0.030% in 14 days.

10. The construction method of the rigid connection joint of the superposed column according to claim 9, characterized in that: In step S3, it further includes welding a number of second stud bolts (14) arranged radially on the inner circumferential surface of the outer steel pipe (8) of the composite column; In step S7, it further includes arranging longitudinal reinforcement bars (11) of the concrete-filled steel pipe of the composite column between the core steel pipe (13) and the outer steel pipe (8) of the composite column.

Images