Lengthened joint structure of prefabricated steel reinforced concrete column

Abstract

The utility model discloses an extension node structure of a prefabricated steel-reinforced concrete column. The extension node structure comprises a connected lower column, a prefabricated steel-reinforced concrete upper column, a connecting steel plate, a corner vertical steel bar connecting piece and node cast-in-place concrete, the connected lower column comprises a lower column core column, a lower column middle vertical reinforcing steel bar, a lower column corner vertical reinforcing steel bar, a lower column stirrup and lower column outer layer concrete; the prefabricated steel reinforced concrete upper column comprises an upper column core column, an upper column middle vertical steel bar, an upper column corner vertical steel bar, an upper column stirrup and upper column outer layer concrete; the lower column core column is connected with the upper column core column; the lower column middle vertical steel bars and the upper column middle vertical steel bars are connected in a welded mode through connecting steel plates, and the lower column corner vertical steel bars and the upper column corner vertical steel bars are connected through corner vertical steel bar connecting pieces. Large operation space can be provided for connection construction of the lower column core column and the upper column core column, operation is convenient, and quality is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a lengthening node structure of a prefabricated steel-framed concrete column. Background Art

[0002] Prefabricated buildings refer to buildings that are assembled by prefabricating parts in factories and transporting them to construction sites for assembly. Promoting prefabricated buildings can not only greatly speed up construction, improve the quality of construction projects, save labor, but also significantly reduce building energy consumption. At present, vigorously developing prefabricated buildings has become a development trend in the modernization of my country's construction industry. Prefabricated steel-framed concrete columns have high bearing capacity, good seismic performance, and long fire resistance, and are very suitable for multi-story and small high-rise prefabricated buildings.

[0003] For the extension node of prefabricated steel-framed concrete columns, when the core steel frame is a solid steel column, the core column can be connected by welding or high-strength bolts; when the core steel frame is a steel tube concrete column, the Chinese invention patent with patent application number CN202010612431.9 discloses an extension node containing a prefabricated steel tube concrete core column component and a construction method thereof, including an upper core column, a lower core column, a steel skeleton, a node concrete layer and a tube outer concrete layer; the bottom end of the upper core column is connected with an upper flange; the lower core column The top of the connection is connected with a lower flange; the connection assembly includes a connection plate, an adhesive layer and high-strength bolts; the connection plate is arranged between the upper flange and the lower flange; air holes are arranged at intervals in the middle of the plate surface of the connection plate; the adhesive layer is arranged between the connection plate and the upper flange and the lower flange respectively; the high-strength bolts connect the upper core column with the lower core column; the steel skeleton is arranged around the node of the upper core column and the lower core column; the node concrete layer is poured between the outer tube concrete layer on the outer side of the upper core column and the outer tube concrete layer on the outer side of the lower core column. In actual construction, it was found that because the reinforced concrete outside the core column contains longitudinal steel bars, when the existing conventional steel bar connection method is adopted, the operating space of the core column connection is greatly limited, and the core column connection is difficult to construct. Utility Model Content

[0004] The utility model provides a prefabricated steel frame concrete column extension node structure which has a simple structure and is easy to operate.

[0005] The technical problem to be solved is: in actual construction, it is found that since the reinforced concrete outside the core column contains longitudinal steel bars, when the existing conventional steel bar connection method is adopted, the operating space of the core column connection is greatly limited, and the core column connection is difficult to construct.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model discloses a prefabricated steel frame concrete column extension node structure, comprising a connected lower column, a prefabricated steel frame concrete upper column, a connecting steel plate, a vertical steel bar connector at a corner, and a node cast-in-place concrete;

[0008] The connected lower column includes a lower column core column, a lower column reinforcement skeleton arranged outside the lower column core column, and an outer layer of lower column concrete; the lower column reinforcement skeleton includes a lower column middle vertical reinforcement, a lower column corner vertical reinforcement, and a lower column stirrup;

[0009] The prefabricated steel frame concrete upper column comprises an upper column core column, an upper column steel bar skeleton arranged outside the upper column core column, and an outer layer of upper column concrete; the upper column steel bar skeleton comprises a middle vertical steel bar of the upper column, a vertical steel bar at an upper column corner, and an upper column stirrup, and the upper column core column, the middle vertical steel bar of the upper column, and the vertical steel bar at an upper column corner are lower than the bottom surface of the prefabricated steel frame concrete upper column;

[0010] The lower column core column and the upper column core column are connected by welding and high-strength bolt connection flange; the middle vertical steel bars of the lower column and the middle vertical steel bars of the upper column are welded and connected by connecting steel plates, and the corner vertical steel bars of the lower column and the corner vertical steel bars of the upper column are connected by corner vertical steel bar connectors.

[0011] The utility model provides a prefabricated steel-framed concrete column extension node structure. Further, the connecting steel plate has a length of 350-650 mm and a thickness of 12-30 mm.

[0012] The utility model provides a prefabricated steel frame concrete column extension node structure, further, the corner vertical steel bar connector is a grouting sleeve connection, a semi-grouting sleeve connection, a cold extrusion sleeve connection or an axial extrusion sleeve connection.

[0013] The utility model discloses a prefabricated steel frame concrete column extension node structure. Further, the lower column core column and the upper column core column are solid steel columns, circular steel tube concrete columns or rectangular steel tube concrete columns.

[0014] The utility model provides a prefabricated steel frame concrete column extension node structure, further, the lower column core column and the upper column core column have a diameter or side length of 100-500mm and a wall thickness of 4-40mm.

[0015] The utility model provides a prefabricated steel frame concrete column extension node structure. Further, the diameter or side length of the connected lower column and the prefabricated steel frame concrete upper column is 350-900mm.

[0016] The utility model provides a prefabricated steel-framed concrete column extension node structure, further, the middle vertical steel bars of the lower column are lower than the top surface of the lower column core column, and the middle vertical steel bars of the upper column are higher than the bottom surface of the upper column core column.

[0017] The utility model provides a prefabricated steel-framed concrete column extension node structure. Further, the net distance between the middle vertical steel bars of the lower column and the middle vertical steel bars of the upper column is 200-300mm.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The extension node of the prefabricated steel-framed concrete column of the utility model can provide a large operating space for the connection construction of the lower column core column and the upper column core column, because the middle vertical steel bars are connected by steel plate welding, and the vertical steel bars at the corners are connected by grouting sleeves, cold extrusion sleeves, etc., which is convenient to operate and reliable in quality, and provides an efficient and reliable connection method for the extension of prefabricated steel-framed concrete columns;

[0020] 2. The extension node of the prefabricated steel-framed concrete column of the utility model has a fast construction speed because the middle vertical steel bars are connected by welding with steel plates, and the column can have a considerable bending bearing capacity in a short time, which is not only safe and reliable, but also very economical;

[0021] 3. The utility model is not only suitable for extending the prefabricated steel-framed concrete columns of the upper floors, but also suitable for connecting the prefabricated steel-framed concrete columns with the foundation. Therefore, the application scope is very broad and helps to promote the development of prefabricated buildings.

[0022] The utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the separation of the connected lower column and the prefabricated steel-framed concrete upper column of the utility model;

[0024] Figure 2 This is a schematic elevation diagram of a joint structure of a prefabricated steel-framed concrete column of the utility model;

[0025] Figure 3 yes Figure 2 AA section view in (when the upper core column is a solid steel column);

[0026] Figure 4 yes Figure 2 BB section view in (at the joint when the upper core column is a solid steel column);

[0027] Figure 5 yes Figure 2 AA section view in (when the upper core column is a circular steel tube concrete column);

[0028] Figure 6 yes Figure 2 BB section view in (when the upper core column is a rectangular steel tube concrete column).

[0029] Reference numerals:

[0030] 1. Upper column core column; 1.1. Core steel pipe; 1.2. Core concrete; 2. Upper column steel skeleton; 2.1. Middle vertical steel bars of upper column; 2.2. Vertical steel bars at corners of upper column; 2.3. Upper column stirrups; 3. Upper column outer concrete; 4. Lower column core column; 5. Lower column steel skeleton; 5.1. Middle vertical steel bars of lower column; 5.2. Vertical steel bars at corners of lower column; 5.3. Lower column stirrups; 6. Lower column outer concrete; 7. Connecting steel plate; 8. Corner vertical steel bar connector; 9. Node cast-in-place concrete. DETAILED DESCRIPTION

[0031] like Figure 1-Figure 6 As shown, the utility model discloses a prefabricated steel-framed concrete column extension node structure, including a connected lower column, a prefabricated steel-framed concrete upper column, a connecting steel plate 7, a corner vertical steel bar connector 8 and a node cast-in-place concrete 9 cast at the connection node between the connected lower column and the prefabricated steel-framed concrete upper column. The connected lower column includes a lower column core column 4, a lower column steel bar skeleton 5 arranged on the outside of the lower column core column 4 and a lower column outer layer of concrete 6; the lower column steel bar skeleton 5 includes lower column middle vertical steel bars 5.1, lower column corner vertical steel bars 5.2 and lower column stirrups 5.3.

[0032] The prefabricated steel-framed concrete upper column includes an upper column core column 1, a steel frame arranged outside the upper column core column 1, and an upper column outer layer concrete 3; the upper column steel frame 2 includes an upper column middle vertical steel bar 2.1, an upper column corner vertical steel bar 2.2, and an upper column stirrup 2.3. The upper column core column 1, the upper column middle vertical steel bar 2.1, and the upper column corner vertical steel bar 2.2 are lower than the bottom surface of the prefabricated steel-framed concrete upper column.

[0033] The outer layer of concrete 6 of the lower column can be prefabricated together with the prefabricated column, so that the prefabrication rate of the column is relatively high; it can also be left empty first and poured together with the node cast-in-place concrete 9. Although there is more cast-in-place concrete, the construction is relatively simple, and the steel bar construction on the outer side of the column is more flexible.

[0034] Furthermore, the lower column core column 4 and the upper column core column 1 adopt solid cross-sections such as H steel columns and cross steel columns, and are connected by welding or high-strength bolts; in addition, the lower column core column 4 and the upper column core column 1 can also adopt circular steel tube concrete columns and rectangular steel tube concrete columns, and the circular steel tube concrete columns and rectangular steel tube concrete columns both include core steel tubes 1.1 and core concrete 1.2; flange connection construction can be adopted. Whether welding connection, high-strength bolt connection or flange connection, a certain operating space is required, and the operation will be affected when the vertical steel bars around the column are penetrated.

[0035] After the connection between the lower column core column 4 and the upper column core column 1 is completed, the middle vertical steel bar 5.1 of the lower column and the middle vertical steel bar 2.1 of the upper column are connected by welding through the connecting steel plate 7. The net distance between the middle vertical steel bar 5.1 of the lower column and the middle vertical steel bar 2.1 of the upper column is 200-300mm to meet the operating space requirements for the connection between the lower column core column 4 and the upper column core column 1.

[0036] The connecting steel plate 7 has a length of 350-650 mm, a width of 120-350 mm, and a thickness of 12-30 mm to meet the needs of strong steel bar connections.

[0037] Since there is a large clearance between the middle vertical steel bar 5.1 of the lower column and the middle vertical steel bar 2.1 of the upper column, the connection construction of the lower column core column 4 and the upper column core column 1 provides a large operating space, which is convenient to operate and has reliable quality. At the same time, after completing the connection between the lower column core column 4 and the upper column core column 1 and the connection between the middle vertical steel bar 5.1 of the lower column and the middle vertical steel bar 2.1 of the upper column, the column has a considerable bending bearing capacity in a short time, which not only makes the installation of the prefabricated column safe and reliable, but also is much better than the traditional grouting sleeve connection.

[0038] The lower column corner vertical reinforcement 5.2 is connected to the upper column corner vertical reinforcement 2.2 through the corner vertical reinforcement connector 8. Preferably, the corner vertical reinforcement connector 8 is a grout sleeve connection, a semi-grout sleeve connection, a cold extrusion sleeve connection or an axial extrusion sleeve connection. The upper column stirrups 2.3 are tied, and finally the node cast-in-place concrete 9 is poured to complete the node construction.

[0039] Furthermore, the diameter or side length of the lower column core column 4 and the upper column core column 1 is 100-500 mm, and the wall thickness is 4-40 mm; the diameter or side length of the connected lower column and the prefabricated steel-framed concrete upper column is 350-900 mm.

[0040] When the lower column core column 4, the lower column middle vertical reinforcement 5.1, and the lower column corner vertical reinforcement 5.2 are located at the middle floor and anchored to the floor column, the extension node of the prefabricated steel frame concrete column of the utility model is the extension node between the columns; when the lower column core column 4, the lower column middle vertical reinforcement 5.1, and the lower column corner vertical reinforcement 5.2 are located at the bottom floor and anchored in the foundation, the extension node of the prefabricated steel frame concrete column of the utility model is the connection node between the column and the foundation. Therefore, the utility model is not only suitable for the extension of the prefabricated steel frame concrete column of the upper floor, but also suitable for the connection between the prefabricated steel frame concrete column and the foundation, and has a very wide range of applications.

[0041] Preferably, the height of the extension node of the prefabricated steel frame concrete column from the floor or foundation is 500 to 1500 mm, so as to facilitate the node connection operation. When the height of the extension node from the floor or foundation is low, the amount of cast-in-place concrete 9 of the node is small, and the prefabrication rate is higher; when the height of the extension node from the floor or foundation is high, the amount of cast-in-place concrete 9 of the node is large, but the construction is more convenient and the force bearing performance is better.

[0042] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A prefabricated steel-reinforced concrete column extension node structure, characterized in that: It comprises a connected lower column, a prefabricated steel-framed concrete upper column, a connecting steel plate (7), a vertical steel bar connector at a corner (8), and a node cast-in-place concrete (9); The connected lower column comprises a lower column core column (4), a lower column reinforcement skeleton (5) arranged outside the lower column core column (4), and a lower column outer layer concrete (6); the lower column reinforcement skeleton (5) comprises lower column middle vertical reinforcement (5.1), lower column corner vertical reinforcement (5.2), and lower column stirrups (5.3); The prefabricated steel frame concrete upper column comprises an upper column core column (1), an upper column steel reinforcement frame (2) arranged outside the upper column core column (1), and an upper column outer layer concrete (3); the upper column steel reinforcement frame (2) comprises an upper column middle vertical reinforcement (2.1), an upper column corner vertical reinforcement (2.2), and an upper column stirrup (2.3); the upper column core column (1), the upper column middle vertical reinforcement (2.1), and the upper column corner vertical reinforcement (2.2) are lower than the bottom surface of the prefabricated steel frame concrete upper column; The lower column core column (4) and the upper column core column (1) are connected by welding and high-strength bolt connection flanges; the middle vertical steel bars (5.1) of the lower column and the middle vertical steel bars (2.1) of the upper column are welded and connected via a connecting steel plate (7); the lower column corner vertical steel bars (5.2) and the upper column corner vertical steel bars (2.2) are connected via corner vertical steel bar connectors (8).

2. The prefabricated steel-reinforced concrete column extension node structure according to claim 1 is characterized in that: The connecting steel plate (7) has a length of 350-650 mm and a thickness of 12-30 mm.

3. The prefabricated steel-reinforced concrete column extension node structure according to claim 1 is characterized in that: The corner vertical steel bar connector (8) is a grouting sleeve connection, a semi-grouting sleeve connection, a cold extrusion sleeve connection or an axial extrusion sleeve connection.

4. The prefabricated steel-reinforced concrete column extension node structure according to claim 1 is characterized in that: The lower column core column (4) and the upper column core column (1) are solid steel columns, circular steel tube concrete columns or rectangular steel tube concrete columns.

5. The prefabricated steel-reinforced concrete column extension node structure according to claim 1, characterized in that: The diameter or side length of the lower column core column (4) and the upper column core column (1) is 100-500 mm, and the wall thickness is 4-40 mm.

6. The prefabricated steel-reinforced concrete column extension node structure according to claim 1, characterized in that: The diameter or side length of the connected lower column and the prefabricated steel-framed concrete upper column is 350-900 mm.

7. The prefabricated steel-reinforced concrete column extension node structure according to claim 1, characterized in that: The middle vertical steel bar (5.1) of the lower column is lower than the top surface of the lower column core column (4), and the middle vertical steel bar (2.1) of the upper column is higher than the bottom surface of the upper column core column (1).

8. The prefabricated steel-reinforced concrete column extension node structure according to claim 7, characterized in that: The net distance between the middle vertical steel bars (5.1) of the lower column and the middle vertical steel bars (2.1) of the upper column is 200-300 mm.

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