Connecting joint for existing reinforced concrete column and newly-added reinforced concrete column
By setting angle steel between the existing reinforced concrete column and the newly added reinforced concrete column and fixing it with stiffening plates, the problem of poor bearing performance in the node area is solved, and the firmness and seismic resistance of the connection are improved.
Patent Information
- Application Number
- CN202421736258.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-21
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-21
AI Technical Summary
In the prior art, the connection method between the newly added reinforced concrete columns and existing reinforced concrete columns leads to poor bearing performance in the node area and poses structural safety hazards.
The combination of angle steel, the first stiffening plate and the second stiffening plate is adopted. The angle steel is arranged in the vertical direction and fixed in the circumference of the newly added reinforced concrete column by the first stiffening plate, and the second stiffening plate is fixed in the circumference of the existing reinforced concrete column to improve the firmness of the connection.
Through the combination of angle steel and stiffening plate fixation, the connection rigidity and seismic ductility of the node area are improved, and the bearing performance of the node area is improved.
Smart Images
Figure CN223135310U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of construction technology, and more particularly, to connection nodes for existing reinforced concrete columns and newly added reinforced concrete columns. Background Art
[0002] There is a huge stock of existing buildings in our country at present. The renovation and performance improvement of existing building structures are the main businesses in the construction field at present and for a quite long period in the future. In renovation projects, the technology of implanting steel bars for increasing floors is widely used in the field of functional renovation of existing buildings.
[0003] In the prior art, for the connection between a newly added reinforced concrete column and an existing reinforced concrete column, the longitudinal bars of the newly added column are usually implanted and anchored in the existing reinforced concrete column. This method causes great damage to the core area concrete, resulting in poor bearing performance in the node area and easy to generate potential structural safety hazards. Summary of the Utility Model
[0004] This application provides a connection node for an existing reinforced concrete column and a newly added reinforced concrete column to solve the problem of how to improve the bearing performance in the node area.
[0005] An embodiment of this application provides a connection node for an existing reinforced concrete column and a newly added reinforced concrete column, including an angle steel, a first stiffening plate and a second stiffening plate. The angle steel is arranged along the vertical direction, and the angle steel extends from the newly added reinforced concrete column to the existing reinforced concrete column. The first stiffening plate is arranged on the circumference of the newly added reinforced concrete column, and the first stiffening plate is used to fix one end of the angle steel close to the newly added reinforced concrete column. The second stiffening plate is arranged on the circumference of the existing reinforced concrete column, and the second stiffening plate is used to fix one end of the angle steel close to the existing reinforced concrete column.
[0006] Compared with the prior art, the connection node for an existing reinforced concrete column and a newly added reinforced concrete column provided in this embodiment sets an angle steel between the existing reinforced concrete column and the newly added reinforced concrete column. One end of the angle steel close to the newly added reinforced concrete column is fixed by the first stiffening plate, and one end of the angle steel close to the existing reinforced concrete column is fixed by the second stiffening plate, so that the existing reinforced concrete column and the newly added reinforced concrete column are firmly connected to achieve the effect of improving the bearing performance in the node area.
[0007] In a possible implementation manner, a plurality of angle steels are provided, and the plurality of angle steels are spaced apart and arranged on the circumference of the existing reinforced concrete column.
[0008] In a possible implementation manner, the connection node for an existing reinforced concrete column and a newly added reinforced concrete column further includes stirrups. The stirrups extend along the horizontal direction, and both ends of the stirrups are respectively connected to the angle steel.
[0009] In a possible implementation manner, a plurality of stirrups are provided, and the plurality of stirrups are arranged at intervals in the vertical direction.
[0010] In a possible implementation manner, the newly added reinforced concrete column includes longitudinal bars, and the longitudinal bars extend to the existing concrete-filled steel tubular column.
[0011] In a possible implementation manner, the connection node for the existing reinforced concrete column and the newly added reinforced concrete column further includes a bonding layer, and the bonding layer is located at the connection between the existing reinforced concrete column and the newly added reinforced concrete column.
[0012] In a possible implementation manner, the existing reinforced concrete column includes a column body and a plurality of beam bodies. The plurality of beam bodies are arranged at intervals in the circumferential direction of the column body. The column body is connected to the plurality of beam bodies, and the angle steel is arranged between the plurality of beam bodies.
[0013] In a possible implementation manner, the connection node for the existing reinforced concrete column and the newly added reinforced concrete column further includes stirrups. The stirrups are arranged on the beam bodies. The stirrups penetrate the beam bodies in the horizontal direction, and both ends of the stirrups are respectively connected to the angle steel.
[0014] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:
[0015] 1. The connection node for the existing reinforced concrete column and the newly added reinforced concrete column provided in this embodiment sets angle steel between the existing reinforced concrete column and the newly added reinforced concrete column. The first stiffening plate fixes one end of the angle steel close to the newly added reinforced concrete column, and the second stiffening plate fixes one end of the angle steel close to the existing reinforced concrete column, so that the existing reinforced concrete column and the newly added reinforced concrete column are firmly connected, so as to improve the connection rigidity of the newly added reinforced concrete column and the existing reinforced concrete column in the joint area, and the force transmission of the angle steel is reliable, so as to achieve the effect of improving the bearing performance of the joint area;
[0016] 2. The connection node for the existing reinforced concrete column and the newly added reinforced concrete column sets a plurality of angle steels. The plurality of angle steels are arranged at intervals in the circumferential direction of the existing reinforced concrete column. The first stiffening plate, the second stiffening plate and the angle steel are connected to exert a constraint effect on the concrete in the joint core area, so that the joint has seismic ductility, so as to achieve the effect of improving the bearing performance of the joint area. Description of the Drawings
[0017] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic structural view of a connection node for an existing reinforced concrete column and a newly added reinforced concrete column according to an embodiment of the present application;
[0019] Figure 2 is Figure 1 a sectional view along the I-I line of the connection node for the existing reinforced concrete column and the newly added reinforced concrete column.
[0020] Main element symbol description:
[0021] 1. Connection node for an existing reinforced concrete column and a newly added reinforced concrete column; 11. Angle steel; 12. First stiffening plate; 13. Second stiffening plate; 14. Stirrup; 15. Longitudinal reinforcement; 16. Bonding layer; 17. Horizontal direction; 18. Vertical direction; 2. Newly added reinforced concrete column; 3. Existing reinforced concrete column; 31. Column body; 32. Beam body. Detailed implementation manners
[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments.
[0023] Some implementation manners of the present application will be described in detail. Without conflict, the following implementation manners and the features in the implementation manners can be combined with each other.
[0024] Embodiment
[0025] Please refer to Figure 1 and Figure 2 , this embodiment provides a connection node 1 for an existing reinforced concrete column and a newly added reinforced concrete column, including angle steel 11, a first stiffening plate 12 and a second stiffening plate 13. The angle steel 11 is arranged along the vertical direction 18, and the angle steel 11 extends from the newly added reinforced concrete column 2 to the existing reinforced concrete column 3. The first stiffening plate 12 is arranged on the circumference of the newly added reinforced concrete column 2, and the first stiffening plate 12 is used to fix one end of the angle steel 11 close to the newly added reinforced concrete column 2. The second stiffening plate 13 is arranged on the circumference of the existing reinforced concrete column 3, and the second stiffening plate 13 is used to fix one end of the angle steel 11 close to the existing reinforced concrete column 3.
[0026] The connection node 1 for an existing reinforced concrete column and a newly added reinforced concrete column provided in this embodiment is configured by arranging angle steels 11 between the existing reinforced concrete column 3 and the newly added reinforced concrete column 2. One end of the angle steel 11 close to the newly added reinforced concrete column 2 is fixed by a first stiffening plate 12, and one end of the angle steel 11 close to the existing reinforced concrete column 3 is fixed by a second stiffening plate 13, so that the existing reinforced concrete column 3 and the newly added reinforced concrete column 2 are firmly connected, thereby enhancing the bearing capacity of the joint area.
[0027] In this embodiment, the first stiffening plate 12 is annular. The first stiffening plate 12 is sleeved on the circumferential surface of the newly added reinforced concrete column 2 and fixes the angle steel 11 to the newly added reinforced concrete column 2. The second stiffening plate 13 is annular. The second stiffening plate 13 is sleeved on the circumferential surface of the existing reinforced concrete column 3 and fixes the angle steel 11 to the existing reinforced concrete column 3. Thus, the first stiffening plate 12 and the second stiffening plate 13 fix the angle steel 11 between the existing reinforced concrete column 3 and the newly added reinforced concrete column 2, thereby enhancing the bearing capacity of the joint area.
[0028] The angle steel 11 is respectively pasted to the interface concrete of the existing reinforced concrete column 3 and the interface concrete of the newly added reinforced concrete column 2 through structural adhesive. One end of the angle steel 11 is fixedly connected to the first stiffening plate 12 by welding, and the other end of the angle steel 11 is fixedly connected to the second stiffening plate 13 by welding.
[0029] The concrete strength grade of the newly added reinforced concrete column 2 is higher than that of the existing reinforced concrete column 3, but does not exceed two grades, and it is cast with slightly expanded concrete.
[0030] In a possible implementation manner, a plurality of the angle steels 11 are provided, and the plurality of angle steels 11 are spaced apart in the circumferential direction of the existing reinforced concrete column 3.
[0031] In this embodiment, the connection node 1 for an existing reinforced concrete column and a newly added reinforced concrete column is configured by arranging a plurality of angle steels 11 spaced apart in the circumferential direction of the existing reinforced concrete column 3. The first stiffening plate 12, the second stiffening plate 13 and the angle steel 11 are connected to exert a constraint on the core area concrete of the joint, enabling the joint to have seismic ductility and enhancing the bearing capacity of the joint area.
[0032] In a possible implementation manner, the connection node 1 for an existing reinforced concrete column and a newly added reinforced concrete column further includes stirrups 14. The stirrups 14 extend along the horizontal direction 17, and both ends of the stirrups 14 are respectively connected to the angle steels 11.
[0033] In this embodiment, the stirrup 14 is strip-shaped and is arranged in the middle of the angle steel 11. The stirrup 14, the first stiffening plate 12 and the second stiffening plate 13 are respectively fixedly connected to the angle steel 11, so as to fix the existing reinforced concrete column 3 and the newly added reinforced concrete column 2, thereby improving the bearing capacity of the joint area.
[0034] In a possible implementation manner, a plurality of the stirrups 14 are provided, and the plurality of stirrups 14 are arranged at intervals along the vertical direction 18.
[0035] In a possible implementation manner, the newly added reinforced concrete column 2 includes longitudinal bars 15, and the longitudinal bars 15 extend to the existing concrete-filled steel tube column.
[0036] In this embodiment, the longitudinal bars 15 of the newly added reinforced concrete column 2 are anchored into the existing concrete-filled steel tube column by the post-inserted rebar method, and the implanted depth of the longitudinal bars 15 should meet the specification requirements.
[0037] In a possible implementation manner, the connection joint 1 for the existing reinforced concrete column and the newly added reinforced concrete column further includes a bonding layer 16, and the bonding layer 16 is located at the connection between the existing reinforced concrete column 3 and the newly added reinforced concrete column 2.
[0038] In this embodiment, the original concrete protective layer is chiseled off the surface of the existing reinforced concrete column 3, and then a concrete interface bonding agent is applied, so as to form a bonding layer 16 at the connection between the existing reinforced concrete column 3 and the newly added reinforced concrete column 2.
[0039] In a possible implementation manner, the existing reinforced concrete column 3 includes a column body 31 and a plurality of beam bodies 32. The plurality of beam bodies 32 are arranged at intervals in the circumferential direction of the column body 31. The column body 31 is connected to the plurality of beam bodies 32, and the angle steel 11 is arranged between the plurality of beam bodies 32.
[0040] In this embodiment, the beam body 32 extends along the horizontal direction 17, and the angle steel 11 passes through the gaps between the plurality of beam bodies 32 and is respectively fixedly connected to the existing reinforced concrete column 3 and the newly added reinforced concrete column 2.
[0041] In a possible implementation manner, the connection joint 1 for the existing reinforced concrete column and the newly added reinforced concrete column further includes a stirrup 14. The stirrup 14 is arranged on the beam body 32. The stirrup 14 penetrates through the beam body 32 along the horizontal direction 17, and both ends of the stirrup 14 are respectively connected to the angle steel 11.
[0042] In this embodiment, the stirrup 14 and the angle steel 11 are fixedly connected by welding.
[0043] When the connection node 1 for the existing reinforced concrete column and the newly added reinforced concrete column provided in this embodiment is under construction, first, the original concrete protective layer of the existing reinforced concrete column 3 is chiseled off to expose the original steel bars of the existing reinforced concrete column 3 and a concrete interface bonding agent is applied; then, the longitudinal bars 15 of the newly added reinforced concrete column 2 are anchored into the existing reinforced concrete column 3 by the post-inserted rebar method, and the inserted depth shall meet the specification requirements; subsequently, the steel bar skeleton of the newly added reinforced concrete column 2 is fabricated on-site and the binding is completed; finally, the formwork is erected, and the slightly expanding concrete is poured into the newly added reinforced concrete column 2 and vibrated compactly. Among them, the concrete strength grade of the newly added reinforced concrete column 2 is higher than that of the existing reinforced concrete column 3, but does not exceed two grades.
[0044] After the newly added reinforced concrete column 2 reaches the design strength, the newly added concrete-filled steel tubular column and the existing concrete-filled steel tubular column are fixed by arranging four longitudinal angle steels 11 in the joint area; then, both ends of each angle steel 11 are connected and welded to each other through the first stiffening plate 12 and the second stiffening plate 13; finally, the angle steels 11 located in the beam body 32 area are hooped by arranging the joint equivalent stirrups 14. Among them, each angle steel 11 passes through the beam body 32 and is pasted with the interface concrete by structural adhesive, and the specific cross-sectional dimensions of the angle steel 11 are determined according to the calculation; the joint equivalent stirrups 14 pass through the beam body 32 and are welded to the angle steel 11, and the beam-piercing hole positions are anchored by adhesive perfusion. To achieve equal-strength connection, the welds adopt first-class full penetration welds.
[0045] The above embodiments are only used to illustrate the technical solutions of the present application rather than to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.
Claims
1. A connection node for an existing reinforced concrete column and a newly added reinforced concrete column, characterized in that Comprising: An angle steel, arranged along the vertical direction, and the angle steel extends from the newly added reinforced concrete column to the existing reinforced concrete column; A first stiffening plate, arranged on the circumference of the newly added reinforced concrete column, and the first stiffening plate is used to fix one end of the angle steel close to the newly added reinforced concrete column; A second stiffening plate, arranged on the circumference of the existing reinforced concrete column, and the second stiffening plate is used to fix one end of the angle steel close to the existing reinforced concrete column.
2. The connection node for the existing reinforced concrete column and the newly added reinforced concrete column according to claim 1, wherein: There are multiple angle steels, and the multiple angle steels are arranged at intervals on the circumference of the existing reinforced concrete column.
3. The connection node for an existing reinforced concrete column and a newly added reinforced concrete column according to claim 2, wherein, Further comprising: Stirrups, the stirrups extend along the horizontal direction, and both ends of the stirrups are respectively connected to the angle steel.
4. The connection node for the existing reinforced concrete column and the newly added reinforced concrete column according to claim 3, wherein: There are multiple stirrups, and the multiple stirrups are arranged at intervals along the vertical direction.
5. The connection node for the existing reinforced concrete column and the newly added reinforced concrete column according to claim 1, wherein: The newly added reinforced concrete column includes longitudinal bars, and the longitudinal bars extend to the existing concrete-filled steel tube column.
6. The connection node for an existing reinforced concrete column and a newly added reinforced concrete column according to claim 1, characterized in that, Further comprising: A bonding layer, which is located at the connection between the existing reinforced concrete column and the newly added reinforced concrete column.
7. The connection node for the existing reinforced concrete column and the newly added reinforced concrete column according to claim 1, wherein: The existing reinforced concrete column includes a column body and multiple beam bodies, the multiple beam bodies are arranged at intervals on the circumference of the column body, the column body is connected to the multiple beam bodies, and the angle steel is arranged between the multiple beam bodies.
8. The connection node for an existing reinforced concrete column and a newly added reinforced concrete column according to claim 7, characterized in that, Further comprising: Stirrups, the stirrups are arranged on the beam body, the stirrups penetrate through the beam body along the horizontal direction, and both ends of the stirrups are respectively connected to the angle steel.