A connecting structure of a concrete-filled steel tube column and a reinforced concrete beam and a construction method thereof

Abstract

The application discloses a connecting structure and construction method of a steel pipe concrete column and a reinforced concrete beam, which comprises a steel pipe concrete column, a primary frame beam, a steel lining plate, a shear ring, a tension structure, a ring beam and a secondary frame beam. A steel lining plate is welded to the outer wall of the steel pipe concrete column, a plurality of through holes are formed in the steel lining plate, a plurality of groups of shear rings are welded to the outer wall of the steel lining plate, the end of the primary frame beam connected with the steel pipe concrete column is provided with the tension structure, one end of the tension structure is connected with the steel lining plate, the ring beam is arranged around the outer ring of the steel lining plate, the steel reinforcement cage in the ring beam penetrates the primary frame beam, and the secondary frame beam is connected with the ring beam. The connecting structure does not need to punch holes in the steel pipe concrete column, does not damage the compression bearing capacity and the bending and torsional resistance of the original structure column, does not damage the quality and safety of the original structure, is safe and stable, and guarantees the construction quality and the structural safety.

Description

Technical Field

[0001] This invention relates to the field of beam-column connection technology, specifically to a connection structure and construction method for a steel-concrete composite column and a reinforced concrete beam. Background Technology

[0002] The connection between steel-concrete composite columns and reinforced concrete beams is a joint method that makes the connection of steel tubes in the joint area safer and more reliable, while the concrete beam can effectively transfer internal forces. Compared with other joint methods, it has the advantages of convenient construction, faster efficiency, and material savings. Steel-concrete composite structures are a new type of composite structure formed by filling steel tubes with concrete, changing the material properties of the two materials and creating a new composite material. Because it combines the advantages of both steel tubes and concrete, while overcoming the disadvantage of local buckling in steel tube structures, it greatly improves the strength and ductility of the concrete, providing load-bearing capacity and deformation capacity. As an emerging composite structure, steel-concrete composite structures are mainly used as axially compressed members with relatively small force eccentricity and are widely used in frame structures (such as factories and high-rise buildings). Some airports, super high-rise buildings, or other important large-scale venues also use the joint structure of steel-concrete composite columns and reinforced concrete beams.

[0003] For example, Chinese utility model patent document CN218116790U discloses a self-aligning straight-extension connection node between a steel pipe column and a concrete beam. In this patent, the long steel reinforcement layer in the steel cage is a component directly inserted into the steel pipe column. Through the cooperation of the arc-shaped pressure plate, not only can the end shape of the long steel reinforcement layer inserted into the steel pipe column be unified, straightened, and corrected, but the number of steel bars inside the steel pipe column can also be reduced, making the entire connection node structure more reasonable, stable, and reliable. The above structure is for the connection structure between the steel pipe column and the concrete beam in a primary structure. However, for the addition of a secondary concrete frame beam on an existing steel pipe concrete column during structural renovation, drilling holes in the existing steel pipe concrete column would damage the compressive bearing capacity and bending and torsional resistance of the original structural column, impairing the quality and safety of the original structure, and failing to guarantee construction quality and structural safety. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to ensure construction quality and structural safety.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A connection structure between a steel-concrete composite column and a reinforced concrete beam includes a steel-concrete composite column, a primary frame beam, a steel liner, a shear ring, a tie structure, a ring beam, and a secondary frame beam. The outer wall of the steel-concrete composite column is welded with a ring of steel liner, which has multiple through holes. Multiple sets of shear rings are also welded to the outer wall of the steel liner. A tie structure is provided at the end where the primary frame beam connects to the steel-concrete composite column, and one end of the tie structure is connected to the steel liner. The ring beam is wound around the outer ring of the steel liner, and a reinforcing cage within the ring beam penetrates the primary frame beam. The secondary frame beam connects to the ring beam.

[0007] By setting multiple shear rings, the shear resistance of the ring beam and the outer wall of the steel liner plate is enhanced, and the interlocking ability between different materials is increased. The steel liner plate is connected to the primary frame beam through a tie structure, ensuring the structural stability of the steel liner plate. In addition, the steel reinforcement cage in the ring beam penetrates the primary frame beam, effectively connecting the ring beam and the primary frame beam, ensuring the structural stability of the ring beam. This, in turn, ensures the effective connection between the secondary frame beam and the steel-concrete composite column connected to the ring beam. This connection structure does not require drilling holes in the steel-concrete composite column, does not damage the compressive bearing capacity and bending and torsional resistance of the original structural column, and does not compromise the quality and safety of the original structure. This connection structure is safe and stable, ensuring construction quality and structural safety.

[0008] Preferably, the tie structure includes tie plates and tie rods. The tie plates are disposed on both sides of the primary frame beam and fixed to the primary frame beam by the tie rods. The side of the tie plates closest to the steel-concrete composite column is welded to the steel lining plate.

[0009] Preferably, the steel liner and the tie plate are further welded with a plurality of studs.

[0010] Preferably, the top and bottom of the steel liner plate are provided with welded joints near the corners of the steel-concrete composite column.

[0011] Preferably, the ends of the reinforcing cage of the secondary frame beam are welded to the steel lining plate.

[0012] Preferably, the height of the ring beam is higher than the height of the primary frame beam.

[0013] Preferably, the present invention also provides a construction method for a connection structure between a steel-concrete composite column and a reinforced concrete beam, comprising the following steps:

[0014] Step 1: Weld the shear ring to the outer wall of the steel liner plate;

[0015] Step 2: Weld the steel liner plate to the concrete-filled steel tube column, and simultaneously weld the steel liner plate and the concrete-filled steel tube column inside the through hole;

[0016] Step 3: Fix the tie structure to the primary frame beam and weld it to the steel liner plate;

[0017] Step 4: Tie the reinforcing cage of the ring beam and the reinforcing cage of the secondary frame beam.

[0018] Step 5: After the formwork for the ring beam and secondary frame beam is erected, pour concrete for the ring beam and secondary frame beam.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] By setting multiple shear rings, the shear resistance of the ring beam and the outer wall of the steel liner plate is enhanced, and the interlocking ability between different materials is increased. The steel liner plate is connected to the primary frame beam through a tie structure, ensuring the structural stability of the steel liner plate. In addition, the steel reinforcement cage in the ring beam penetrates the primary frame beam, effectively connecting the ring beam and the primary frame beam, ensuring the structural stability of the ring beam. This, in turn, ensures the effective connection between the secondary frame beam and the steel-concrete composite column connected to the ring beam. This connection structure does not require drilling holes in the steel-concrete composite column, does not damage the compressive bearing capacity and bending and torsional resistance of the original structural column, and does not compromise the quality and safety of the original structure. This connection structure is safe and stable, ensuring construction quality and structural safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0022] Figure 2 This is a partial cross-sectional view of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the steel liner plate according to an embodiment of the present invention. Detailed Implementation

[0024] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0027] See Figures 1 to 3 This embodiment discloses a connection structure between a steel-concrete composite column and a reinforced concrete beam, including a steel-concrete composite column 1, a primary frame beam 2, a steel liner plate 3, a shear ring 4, a tie structure 5, a ring beam 6, and a secondary frame beam 7. A steel liner plate 3 is welded to the outer wall of the steel-concrete composite column 1. The steel liner plate 3 is also provided with multiple through holes 31 for plug welding connection between the steel liner plate 3 and the steel-concrete composite column 1, increasing the connection points between the steel liner plate 3 and the existing steel-concrete composite column 1, thereby enhancing the connection effect between the steel liner plate 3 and the steel-concrete composite column 1 and improving the shear bearing capacity.

[0028] The outer wall of the steel liner plate 3 is also welded with multiple sets of shear rings 4, which enhance the shear resistance of the ring beam 6 and the outer wall of the steel liner plate 3 and increase the interlocking ability between different materials; the end of the primary frame beam 2 connected to the steel tube concrete column 1 is provided with a tie structure 5, one end of the tie structure 5 is also connected to the steel liner plate 3, the ring beam 6 is wrapped around the outer ring of the steel liner plate 3, the steel cage in the ring beam 6 passes through the primary frame beam 2, and the secondary frame beam 7 is connected to the ring beam 6.

[0029] By setting multiple sets of shear rings 4, the shear resistance of the ring beam 6 and the outer wall of the steel liner 3 is enhanced, and the interlocking ability between different materials is increased. The steel liner 3 is connected to the primary frame beam 2 through the tie structure 5, ensuring the structural stability of the steel liner 3. In addition, the steel cage in the ring beam 6 penetrates the primary frame beam 2, so that the ring beam 6 and the primary frame beam 2 are effectively connected, ensuring the structural stability of the ring beam 6. This, in turn, ensures the effective connection between the secondary frame beam 7 and the steel tube concrete column 1 connected to the ring beam 6. This connection structure does not require drilling holes in the steel tube concrete column, will not damage the compressive bearing capacity and bending and torsional resistance of the original structural column, and will not damage the quality and safety of the original structure. This connection structure is safe and stable, ensuring construction quality and structural safety.

[0030] The top and bottom of the steel liner plate 3 are provided with welding joints near the corners of the steel-concrete composite column 1, which increases the welding area between the steel liner plate 3 and the steel-concrete composite column 1 and further enhances the connection effect between the steel liner plate 3 and the steel-concrete composite column 1.

[0031] The tie structure 5 includes tie steel plates 51 and tie rods 52. The tie steel plates 51 are arranged on both sides of the primary frame beam 2 and fixed to the primary frame beam 2 by the tie rods 52. The side of the tie steel plates 51 closest to the steel tube concrete column 1 is welded to the steel lining plate 3.

[0032] Furthermore, multiple studs 8 are welded onto the steel liner plate 3 and the tie plate 51 to improve the connection strength between the concrete and the steel liner plate 3 and the tie plate 51 in the ring beam 6.

[0033] The ends of the reinforcing cage of the secondary frame beam 7 are welded to the steel liner plate 3 to ensure that the secondary frame beam 7 is stably connected to the steel liner plate 3.

[0034] Furthermore, the height of the ring beam 6 is higher than the height of the primary frame beam 2.

[0035] In this embodiment, two primary frame beams 2 are connected to the steel-concrete composite column 1.

[0036] This embodiment also discloses a construction method for a connection structure between a steel-concrete composite column and a reinforced concrete beam, including the following steps:

[0037] Step 1: First, weld the shear ring 4 and the stud 8 to the outer wall of the steel liner plate 3;

[0038] Step 2: Weld the steel liner plate 3 onto the steel-concrete composite column 1, and simultaneously plug weld the steel liner plate 3 and the steel-concrete composite column 1 together in the through hole 31.

[0039] Step 3: Multiple mounting holes are made on the primary frame beam 2 for the tie rods 52 and the main reinforcing bars of the steel cage in the ring beam 6 to pass through. The tie plates 51 are fixed to the primary frame beam 2 by the tie rods 52, and the tie plates 51 are welded to the steel lining plate 3.

[0040] Step 4: Tie the reinforcing cage of the ring beam 6 and the reinforcing cage of the secondary frame beam 7.

[0041] Step 5: After the formwork for ring beam 6 and secondary frame beam 7 is erected, pour concrete for ring beam 6 and secondary frame beam 7.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] The above embodiments are merely examples of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A connection structure between a steel-concrete composite column and a reinforced concrete beam, characterized in that: The system includes a concrete-filled steel tube column, a primary frame beam, a steel liner, a shear ring, a tie beam, a ring beam, and a secondary frame beam. The outer wall of the concrete-filled steel tube column is welded with a ring of steel liner, which has multiple through holes. The outer wall of the steel liner is also welded with multiple sets of shear rings. The end of the primary frame beam that connects to the concrete-filled steel tube column is provided with a tie beam, one end of which is also connected to the steel liner. The ring beam is wrapped around the outer ring of the steel liner, and the reinforcing cage inside the ring beam passes through the primary frame beam. The secondary frame beam connects to the ring beam.

2. The connection structure between a steel-concrete composite column and a reinforced concrete beam according to claim 1, characterized in that: The tie structure includes tie plates and tie rods. The tie plates are arranged on both sides of the primary frame beam and fixed to the primary frame beam by the tie rods. The side of the tie plates closest to the steel tube concrete column is welded to the steel lining plate.

3. The connection structure between a steel-concrete composite column and a reinforced concrete beam according to claim 2, characterized in that: The steel liner and tie plate are also welded with multiple studs.

4. The connection structure between a steel-concrete composite column and a reinforced concrete beam according to claim 1, characterized in that: The top and bottom of the steel liner plate are provided with welded joints near the corners of the steel-concrete composite column.

5. The connection structure between a steel-concrete composite column and a reinforced concrete beam according to claim 1, characterized in that: The steel reinforcement cage of the secondary frame beam is welded to the steel lining plate at its end.

6. The connection structure between a steel-concrete composite column and a reinforced concrete beam according to claim 1, characterized in that: The height of the ring beam is higher than the height of the primary frame beam.

7. A construction method for a connection structure between a steel-concrete composite column and a reinforced concrete beam as described in any one of claims 1-6, characterized in that: Includes the following steps: Step 1: Weld the shear ring to the outer wall of the steel liner plate; Step 2: Weld the steel liner plate to the concrete-filled steel tube column, and simultaneously weld the steel liner plate and the concrete-filled steel tube column inside the through hole; Step 3: Fix the tie structure to the primary frame beam and weld it to the steel liner plate; Step 4: Tie the reinforcing cage of the ring beam and the reinforcing cage of the secondary frame beam. Step 5: After the formwork for the ring beam and secondary frame beam is erected, pour concrete for the ring beam and secondary frame beam.

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