A connection node between a concrete beam and an inclined column

Abstract

This utility model discloses a connection node between a concrete beam and an inclined column. A square column cap encloses the inclined column node area, providing ample anchorage space for the beam's longitudinal reinforcement and ensuring reliable force transfer to the inclined column. The use of a cubic column cap instead of the traditional cylindrical structure significantly simplifies formwork erection. An innovative method uses U-shaped and L-shaped steel bars lapped together to form vertical closed stirrups, significantly reducing the difficulty of steel bar processing and tying, and avoiding the construction defects of integrally bent stirrups. The beam's longitudinal reinforcement is arranged differently according to the connection direction: for multi-beam connections, continuous reinforcement is used for continuous force transfer; for single-sided beam connections, it is extended and bent for anchorage, optimizing the reinforcement density in the node area. The recessed design at the bottom of the square column cap provides space for concrete vibration, ensuring the compactness of the pour. This node balances structural reliability and construction convenience, effectively solving the problem of non-orthogonal beam-column connections.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, specifically to a connection node structure between a concrete beam and an inclined column, which is particularly suitable for beam-column nodes that are not orthogonally arranged. Background Technology

[0002] In building structures, the connection between concrete beams and inclined columns is a crucial point for transmitting internal forces. Traditional connection methods are mainly divided into two categories: one is direct beam-column connection, and the other is connection through column cap transition.

[0003] Direct connection is feasible when the inclined column has a small inclination angle or the beam section height is low. However, when the inclined column has a large inclination angle or the beam section height is high, it is difficult for the beam end section and the inclined column surface to completely overlap, resulting in insufficient effective connection area in the joint area. In addition, the dense arrangement of reinforcing bars in a narrow space can easily lead to insufficient spacing between the reinforcing bars, making it difficult to fill the concrete densely during pouring and causing quality defects.

[0004] While cylindrical column capitals can expand the joint area, their curved formwork is complex to fabricate, requires high precision in formwork support, and results in low construction efficiency. When tying reinforcing bars within a cylindrical space, operators struggle to accurately position the stirrups, leading to problems such as rebar displacement and insufficient lap length. More importantly, the closed stirrups of traditional column capitals require continuous bending of a single rebar, demanding extremely high processing precision, making construction difficult and quality control challenging.

[0005] In summary, existing technologies struggle to balance node reliability, ease of construction, and quality control, necessitating a new type of connection node to resolve these contradictions. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this utility model provides a non-orthogonal concrete beam-inclined column connection node that is easy to construct and has reliable force transmission. It optimizes the reinforcement anchorage and formwork support through a square column cap and innovates the stirrup structure to reduce construction difficulty.

[0007] To solve the above-mentioned technical problems, the technical solution proposed in this application is as follows:

[0008] This invention provides a connection node between a concrete beam and an inclined column, comprising:

[0009] Concrete inclined column, at least one concrete beam, and square column capital;

[0010] The square column cap encloses the inclined column node area at the beam-column intersection, and the inner wall of the square column cap completely covers the inclined column surface of the node area.

[0011] The ends of each concrete beam are connected to the sidewall of the square column cap, and the longitudinal reinforcement of the beam extends through into the interior of the square column cap.

[0012] The bottom elevation of the square column cap is lower than the bottom elevation of the concrete beam.

[0013] The vertical closed stirrups of the square column cap are formed by overlapping U-shaped and L-shaped steel bars to create a closed ring structure.

[0014] Furthermore, the inclined column is a cylindrical structure;

[0015] When both sides of the inclined column are connected to concrete beams, the longitudinal reinforcement of one side of the concrete beam passes through the square column cap and the inclined column, and extends into the concrete beam on the other side as its longitudinal reinforcement.

[0016] When the inclined column is connected to the concrete beam on only one side, the longitudinal reinforcement of the concrete beam extends to the opposite side of the square column cap and then bends and anchors.

[0017] Furthermore, the square column cap is a vertically arranged cubic structure, and its bottom elevation is 50mm lower than the bottom elevation of the concrete beam.

[0018] Furthermore, the minimum distance between the outer wall of the square column cap and the outer edge of the inclined column is 100-150mm.

[0019] Furthermore, the steel reinforcement cage of the square column cap includes:

[0020] Multi-layered parallel horizontal closed stirrups, each layer of horizontal closed stirrups is formed by continuously bending a single steel bar into a rectangular frame;

[0021] Multiple sets of vertical closed stirrups, each set of vertical closed stirrups is composed of one U-shaped steel bar and two L-shaped steel bars lapped together.

[0022] Furthermore, the open end of the U-shaped steel bar overlaps with the end of the L-shaped steel bar, the overlap length is not less than 10 times the diameter of the steel bar, and the overlap part is welded and fixed.

[0023] Furthermore, when multiple concrete beams are connected to inclined columns, at least two concrete beams have the same top surface elevation, and the top surface elevation of the square column cap is flush with the top surface of the concrete beam.

[0024] Furthermore, the horizontal closed stirrups of the square column cap have clearance openings in the area where the beam longitudinal reinforcement passes through, and the beam longitudinal reinforcement passes through these openings to extend into the interior of the column cap.

[0025] Furthermore, the concrete beam includes three concrete beams located in different directions: a first concrete beam, a second concrete beam, and a third concrete beam. The bottom elevation of the first concrete beam is higher than the bottom elevations of the second and third concrete beams, and the top elevations of the three concrete beams are the same.

[0026] Compared with existing technologies, the connection node between a concrete beam and an inclined column of the present invention achieves the following beneficial technical effects:

[0027] This invention uses a square column cap to wrap around the inclined column node, providing ample anchorage space for the longitudinal reinforcement of the beam and ensuring reliable transmission of internal forces. The cubic structure of the column cap greatly simplifies the formwork erection process and improves construction efficiency. The innovative use of split U-shaped and L-shaped steel bars lapped together to form vertical stirrups significantly reduces the difficulty of steel bar processing and binding, avoiding the construction defects of traditional integrally bent stirrups. At the same time, the optimized steel bar arrangement in the node area effectively ensures the compactness of the concrete pouring, thereby improving the overall structural quality and durability. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural schematic diagram of a connection node between a concrete beam and an inclined column according to this application.

[0030] Figure 2 This is a schematic diagram of the reinforcement arrangement of a connection node between a concrete beam and an inclined column according to this application.

[0031] Figure 3 This is a top view of the column cap reinforcement arrangement of a connection node between a concrete beam and an inclined column according to this application.

[0032] Figure 4 This is a side view of the column cap reinforcement arrangement of a connection node between a concrete beam and an inclined column according to this application.

[0033] Figure 5 This is a schematic diagram of the arrangement of circumferential stirrups in the column cap of a connection node between a concrete beam and an inclined column according to this application.

[0034] The reference numerals used in this application include: 1. Concrete inclined column; 2. Square column cap; 3. First concrete beam; 4. Second concrete beam; 5. Third concrete beam; 6. Longitudinal reinforcement of the first concrete beam; 7. Longitudinal reinforcement of the second concrete beam; 8. Longitudinal reinforcement of the third concrete beam; 9. First vertical stirrup; 10. Second vertical stirrup; 11. Horizontal stirrup; 12. First U-shaped steel bar; 13. L-shaped steel bar; 14. Second U-shaped steel bar; 15. L-shaped steel bar. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] An embodiment of the connection node between a concrete beam and an inclined column in this application is as follows: Figure 1 As shown, the structure includes a concrete inclined column 1, a square column cap 2, and three concrete beams (first concrete beam 3, second concrete beam 4, and third concrete beam 5). The square column cap 2 encloses the joint area of ​​the concrete inclined column 1, with its inner wall completely fitting the surface of the inclined column. The ends of the three concrete beams are vertically connected to the sidewalls of the square column cap 2. The centerlines of the first concrete beam 3 and the third concrete beam 5 coincide, and the top surfaces of the three beams are flush, but the bottom surface of the first concrete beam 3 is higher than the bottom surfaces of the second and third concrete beams 4 and 5. The top surface of the square column cap 2 is flush with the top of the beams, and its bottom surface is 50 mm lower than the bottom surfaces of the second and third concrete beams. The distance between the square column cap 2 and the edge of the inclined column 1 is greater than 100-150 mm. Preferably, the inclined column 1 is a cylinder.

[0037] In this embodiment, as Figure 2 As shown, the longitudinal reinforcement 7 of the second concrete beam 4 passes through the square column cap 2 and through the inclined column 1 to reach the opposite side of the square column cap 2. The center lines of the first concrete beam 3 and the third concrete beam 3 coincide. The longitudinal reinforcement 6 of the first concrete beam and the longitudinal reinforcement 8 of the third concrete beam pass through the square column cap 2 and through the inclined column 1 for continuous arrangement. All beam longitudinal reinforcements are arranged to avoid the reinforcement of the square column cap 2.

[0038] Preferably, the longitudinal reinforcement 7 of the second concrete beam is bent and anchored after reaching the side of the square column cap 2. The longitudinal reinforcement 6 of the first concrete beam and the longitudinal reinforcement 8 of the third concrete beam have the same specifications and quantity to facilitate the continuous reinforcement.

[0039] In this embodiment, as Figure 3 and Figure 4 As shown, the reinforcing bars of the square column cap 2 are composed of a first vertical stirrup 9, a second vertical stirrup 10, and a horizontal stirrup 11.

[0040] In this embodiment, as Figure 5 As shown, the first vertical stirrup 9 is formed by overlapping one first U-shaped steel bar 12 and two L-shaped steel bars 13, and the second vertical stirrup 10 is formed by overlapping one second U-shaped steel bar 14 and two L-shaped steel bars 15.

[0041] The construction process in this embodiment is as follows:

[0042] 1) Determine the orientation and top elevation of the concrete beams, where the center lines of the first concrete beam 3 and the third concrete beam 3 coincide, and the top elevations of the three concrete beams are consistent.

[0043] 2) Determine the top elevation, height, and planar dimensions of the square column cap 2 based on the height of the concrete beam and the inclined column 1;

[0044] 3) Tie the reinforcing bars of inclined column 1 and square column cap 2, wherein the vertical reinforcing bars of square column cap 2 are formed by lapping one U-shaped bar and two L-shaped bars;

[0045] 4) Erect the formwork for inclined column 1, square column cap 2, and three concrete beams;

[0046] 5) Tie the reinforcing bars of the concrete beams, wherein the longitudinal reinforcing bars 7 of the second concrete beam 4 are inserted into the square column cap 2 and the inclined column 1 and avoid the reinforcing bars of the square column cap 2 and the inclined column 1, and are bent and anchored downward on the opposite side of the square column cap 2. The longitudinal reinforcing bars 6 of the first concrete beam 3 and the longitudinal reinforcing bars 8 of the third concrete beam 3 are inserted into the square column cap 2 and the inclined column 1 and are arranged in a continuous manner.

[0047] 6) Pour concrete to complete the construction.

[0048] 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 foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connection joint of a concrete beam and a diagonal column, characterized by, include: A concrete inclined column (1), at least one concrete beam, and a square column capital (2); The square column cap (2) wraps around the inclined column (1) node area at the beam-column junction, and the inner wall of the square column cap (2) completely covers the inclined column surface of the node area; The ends of each concrete beam are connected to the side wall of the square column cap (2), and the longitudinal reinforcement of the beam extends through into the interior of the square column cap (2); The bottom elevation of the square column cap (2) is lower than the bottom elevation of the concrete beam; The vertical closed stirrups of the square column cap (2) are formed by overlapping U-shaped and L-shaped steel bars to form a closed ring structure.

2. The connection node according to claim 1, characterized in that: The inclined column (1) is a cylindrical structure; When both sides of the inclined column (1) are connected to concrete beams, the longitudinal reinforcement of one side of the concrete beam passes through the square column cap (2) and the inclined column (1) and extends into the concrete beam on the other side as its longitudinal reinforcement. When the inclined column (1) is connected to the concrete beam on only one side, the longitudinal reinforcement of the concrete beam extends to the opposite side of the square column cap (2) and is then bent and anchored.

3. The connection node according to claim 1, characterized in that: The square column cap (2) is a vertically arranged cubic structure, and its bottom elevation is 50mm lower than the bottom elevation of the concrete beam.

4. The connection node according to claim 1, characterized in that: The minimum distance between the outer wall of the square column cap (2) and the outer edge of the inclined column (1) is 100-150 mm.

5. The connection node according to claim 1, characterized in that: The steel reinforcement cage of the square column cap (2) includes: Multi-layer parallel horizontal closed stirrups (11), each layer of horizontal closed stirrups (11) is formed by continuously bending a single steel bar into a rectangular frame; Multiple sets of vertical closed stirrups, each set of vertical closed stirrups is composed of one U-shaped steel bar (12, 14) and two L-shaped steel bars (13, 15) lapped together.

6. The connection node according to claim 5, characterized in that: The open ends of the U-shaped steel bars (12, 14) are lapped with the ends of the L-shaped steel bars (13, 15), with a lap length of not less than 10 times the diameter of the steel bars, and the lapped parts are welded and fixed.

7. The connection node according to claim 1, characterized in that: When multiple concrete beams are connected to the inclined column (1), the maximum difference in the top surface elevation between the concrete beams does not exceed the height of the shortest beam, and the top surface elevation of the square column cap (2) is flush with the top surface of the highest concrete beam.

8. The connection node according to claim 1, characterized in that: The horizontal closed stirrups (11) of the square column cap (2) avoid the longitudinal reinforcement of the beam in the area where the longitudinal reinforcement of the beam passes through, and the longitudinal reinforcement of the beam passes through the opening and extends into the interior of the column cap.

9. The connection node according to any one of claims 1-8, characterized in that: The concrete beams include three concrete beams located in different directions: a first concrete beam (3), a second concrete beam (4), and a third concrete beam (5), wherein the bottom elevation of the first concrete beam (3) is higher than the bottom elevation of the second concrete beam (4) and the third concrete beam (5).

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