Reinforced concrete composite column and structure
By designing the combined design of the prefabricated column shell and the cast -in -law core column in the connected area of the reinforced concrete overlap column, directly connect the longitudinal steel bars and strengthen the horizontal steel bars in the node area, solving the problem of the traditional stacking column connection area and the decreased load capacity. , Achieve higher bending bending capacity and delay.
Patent Information
- Application Number
- CN202420492204.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-14
AI Technical Summary
The stiffness and bearing capacity of traditional reinforced concrete stacked columns in the connection area have decreased, and the overlapping force transmission performance is poor.
The upper and lower columns are adopted. Each column section includes the prefabricated column shell and the pyrine core column, and the longitudinal steel bars of the prefabricated column shell are directly connected through the sleeve or welding. And add horizontal steel bars to the connected area to strengthen the bending and shear bearing capacity.
It improves the bending capacity, rigidity and delay in the connected area, enhanced the performance of power transmission, and enhances the bearing capacity and delay of the overall column.
Smart Images
Figure CN222413724U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of prefabricated concrete structures, in particular to a reinforced concrete composite column and structure. Background Art
[0002] Building industrialization is the focus of national construction and development, and reinforced concrete composite columns are an important form of precast concrete structure. Reinforced concrete composite columns usually use the vertical reinforcement of the precast part not to extend out of the precast concrete surface, disconnected in the connection area, and locally add longitudinal reinforcement to the cast-in-place part of the node connection area to form an indirect connection. The stiffness and bearing capacity of this type of composite column in the node connection area are reduced, and the force transmission performance of the longitudinal reinforcement of the cast-in-place and precast parts is poor. Utility Model Content
[0003] The utility model aims to provide a reinforced concrete composite column, which aims to solve the technical problems of reduced rigidity and bearing capacity in the connection area of the traditional reinforced concrete composite column and poor lap force transmission performance.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A reinforced concrete composite column comprises an upper and lower column section, each column section comprises a prefabricated column shell and a cast-in-place core column; the prefabricated column shell comprises column shell concrete and column shell steel bars, the column shell steel bars comprise column shell longitudinal bars and column shell stirrups, one end or both ends of the column shell longitudinal bars extend out of the column shell concrete surface; the cast-in-place core column comprises core column concrete and core column steel bars; the core column steel bars comprise core column longitudinal steel bars and core column transverse steel bars; the core column longitudinal steel bars are arranged along the entire length of the column shell; the column shell stirrups are located in the prefabricated column shell and have no intersection with the core column steel bars; the column shell longitudinal bars of the upper and lower column sections are arranged correspondingly and connected as a whole, and the gap between the connection node areas is poured with node area filling material.
[0006] Preferably, the strength of the column shell concrete is not less than the strength of the core column concrete; the node area filling material is concrete or grouting material or UHPC.
[0007] Preferably, in the reinforced concrete composite column, the longitudinal reinforcement of the core column and the transverse reinforcement of the core column form a reinforcement cage; the transverse reinforcement of the core column has at least one closed stirrup; and the longitudinal reinforcement of the core column is continuous in the connection node area between the upper and lower column sections.
[0008] Preferably, in the reinforced concrete composite column, the transverse reinforcement of the core column is strengthened in the connection node area between the upper and lower column sections, and the strengthening method is to reduce the spacing of the transverse reinforcement or increase the diameter or increase the number of limbs.
[0009] Preferably, in the reinforced concrete composite column, the cross-sectional shape of the inner wall of the prefabricated column shell is circular or polygonal; the inner wall of the column shell is a rough surface and / or partially protruded and / or has shear keys; the shear keys are composed of steel bars and concrete.
[0010] Preferably, in the reinforced concrete composite column, the column shell longitudinal reinforcement is arranged along the circumference of the prefabricated column shell, and the column shell longitudinal reinforcement and the column shell stirrups form a steel cage.
[0011] Preferably, in the reinforced concrete composite column, the longitudinal reinforcements of the column shells of the two column sections connected up and down are connected by connecting pieces or welding; the connecting pieces are cold-extruded sleeves or threaded sleeves.
[0012] Preferably, in the reinforced concrete composite column, there are transverse steel bars between the connection node areas of the two column sections connected up and down, and the transverse steel bars are wrapped by the filling material in the node area.
[0013] Preferably, in the reinforced concrete composite column, the ends of the longitudinal reinforcements of the column shell are provided with transverse steel plates, and the transverse steel plates are fixedly connected to the longitudinal reinforcements of the column shell.
[0014] A reinforced concrete composite column structure, wherein the reinforced concrete composite column is fixedly connected to a beam to form a frame; longitudinal reinforcement of the beam is arranged between the connection node areas of two column sections connected up and down.
[0015] Compared with the prior art, the utility model has the following characteristics and beneficial effects.
[0016] The longitudinal reinforcements of the prefabricated column shell of the reinforced concrete composite column of the utility model are directly connected by sleeves or welding, which directly transmits force and avoids indirect force transmission, increases the effective cross-sectional height of the connection area, and improves the bending bearing capacity, stiffness and ductility of the connection area.
[0017] The transverse reinforcement of the prefabricated column shell of the reinforced concrete composite column of the utility model does not cross the reinforcement of the cast-in-place core column, which is beneficial to improving the concrete quality of the cast-in-place core column and is convenient for construction.
[0018] The longitudinal reinforcement of the cast-in-place core column of the reinforced concrete composite column of the utility model is continuous in the node connection area, and the transverse reinforcement is strengthened in the connection area, thereby improving the bending and shear bearing capacity performance of the connection area.
[0019] The longitudinal reinforcement of the cast-in-place core column of the reinforced concrete composite column of the utility model is continuous, thereby reducing the shrinkage creep of the cast-in-place concrete core column. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0021] Figure 1 Schematic diagram of the vertical structure.
[0022] Figure 2 Schematic diagram of the floor plan.
[0023] Figure numerals: Figure numerals: 1 - precast column shell, 1.1 - column shell concrete, 1.2 - column shell reinforcement, 1.2a - column shell longitudinal reinforcement, 1.2b - column shell stirrups, 2 - cast-in-place core column, 2.1 - core column concrete, 2.2 - core column reinforcement, 2.2a - core column longitudinal reinforcement, 2.2b - core column stirrups, 3 - shear key, 4 - node area filling material, 5 - connector. DETAILED DESCRIPTION
[0024] In order to better understand the purpose, technical solution and function of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiments of the utility model and their descriptions are used to explain the utility model, but are not intended to limit the utility model.
[0025] In the description of the present utility model, it is to be understood that the terms "include / comprise", "consist of..." or any other variations thereof are intended to cover non-exclusive inclusion, so that a product, device, process or method including a series of elements includes not only those elements, but also other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of further restrictions, the elements defined by the phrases "include / comprise..." or "consist of..." do not exclude the presence of other identical elements in the product, device, process or method including the elements.
[0026] In the present utility model, unless otherwise clearly specified and limited, the term "fixed connection" should be understood in a broad sense, for example: it can be a sleeve connection, an overlap, a welding, a bolt connection, or a combination of the above connections; the terms "installation", "connection", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components; the term "through-length steel bar" means that the steel bar is continuous without disconnection, or the steel bar is disconnected but the disconnected steel bars are fixedly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] It should also be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and should not be understood as a limitation on the present invention.
[0028] The following is a detailed description of the implementation of the present invention using preferred implementation methods in conjunction with the accompanying drawings.
[0029] like Figure 1 and Figure 2 As shown, a reinforced concrete composite column comprises two column sections connected in an upper and lower manner, each column section comprises a prefabricated column shell 1 and a cast-in-place core column 2; the prefabricated column shell 1 comprises column shell concrete 1.1 and column shell steel bars 1.2, the column shell steel bars 1.2 comprise column shell longitudinal bars 1.2a and column shell stirrups 1.2b, one end or both ends of the column shell longitudinal bars 1.2a extend out of the surface of the column shell concrete 1.1; the cast-in-place core column 2 comprises core column concrete 2.1 and core column steel bars 2.2; the core column steel bars 2.2 comprise core column longitudinal steel bars 2.2a and core column transverse steel bars 2.2b; the core column longitudinal steel bars 2.2a are arranged along the entire length of the column shell; the column shell stirrups 1.2b are located in the prefabricated column shell 1, and have no intersection with the core column steel bars 2.2; the column shell longitudinal bars 1.2a of the upper and lower column sections are arranged correspondingly and connected as a whole, and the gap between the connecting node areas is poured with node area filling material 4.
[0030] In this embodiment, the transverse reinforcement of the prefabricated column shell of the reinforced concrete composite column does not cross the reinforcement of the cast-in-place core column, which is beneficial to improving the concrete quality of the cast-in-place core column and facilitating construction; the inner core column is a reinforced concrete column, which is beneficial to reducing the shrinkage creep of concrete and improving the bearing capacity and ductility of the column. The size of the core column is not less than 150mm.
[0031] Preferably, the strength of the column shell concrete 1.1 is not less than the strength of the core column concrete 2.1; the node area filling material 4 is concrete or grouting material or UHPC. The column shell can be made of high-strength concrete to reduce the amount of materials used.
[0032] Preferably, in the reinforced concrete composite column, the core column longitudinal reinforcement 2.2a and the core column transverse reinforcement 2.2b form a reinforcement cage; the core column transverse reinforcement 2.2b has at least one closed stirrup; the core column longitudinal reinforcement 2.2a is continuous in the connection node area of the upper and lower column sections. The core column longitudinal reinforcement is continuous in the connection area, which is conducive to staggering the joints in the column shell node area and improving redundancy.
[0033] Preferably, in reinforced concrete composite columns, the core column transverse reinforcement 2.2b is strengthened in the connection node area between the upper and lower column sections, and the strengthening method is to reduce the spacing of the transverse reinforcement 2.2b, increase the diameter, or increase the number of limbs, so as to improve the shear bearing capacity and ductility of the node area.
[0034] Preferably, in the reinforced concrete composite column, the cross-sectional shape of the inner wall of the prefabricated column shell 1 is circular or polygonal; the inner wall of the column shell is rough and / or partially convex and / or has a shear key 3; the shear key is composed of steel bars and concrete, so that the column shell and the core column work together.
[0035] Preferably, in a reinforced concrete composite column, the column shell longitudinal reinforcement 1.2a is arranged along the circumference of the prefabricated column shell 1, and the column shell longitudinal reinforcement 1.2a and the column shell stirrups 1.2b form a steel cage. Function: Improve the ductility of the column.
[0036] Preferably, in the reinforced concrete composite column, the column shell longitudinal reinforcement 1.2a of the two column sections connected up and down are connected by a connector 5, and the connector 5 is a cold extruded sleeve or a threaded sleeve. Function: The cold extruded sleeve or threaded sleeve is used for connection, and the quality is relatively controllable and easy to construct. The height of the node area is not less than 200mm.
[0037] Preferably, in the reinforced concrete composite column, the column shell longitudinal reinforcement 1.2a of the two column sections connected up and down are connected by welding. Function: Direct force transmission.
[0038] Preferably, in the reinforced concrete composite column, there are transverse steel bars between the two column sections connected up and down in the connection node area, and the transverse steel bars are wrapped by the node area filling material 4. Function: to improve the shear bearing capacity and ductility of the node area.
[0039] Preferably, in the reinforced concrete composite column, the ends of the column shell longitudinal reinforcement 1.2a are provided with transverse steel plates, which are fixedly connected to the column shell longitudinal reinforcement 1.2a. Function: to facilitate the connection of the longitudinal reinforcement.
[0040] A reinforced concrete composite column structure, wherein the reinforced concrete composite column is fixedly connected to the beam to form a frame; and longitudinal steel bars of the beam are arranged between the connection nodes of the two upper and lower column sections, forming a corresponding composite concrete frame.
[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.
Claims
1. A reinforced concrete composite column, characterized in that: The reinforced concrete composite column comprises an upper and lower column section, wherein the column section comprises a prefabricated column shell (1) and a cast-in-place core column (2); the prefabricated column shell (1) comprises column shell concrete (1.1) and column shell steel bars (1.2); the column shell steel bars (1.2) comprise column shell longitudinal bars (1.2a) and column shell stirrups (1.2b); one end or both ends of the column shell longitudinal bars (1.2a) extend out of the surface of the column shell concrete (1.1); the cast-in-place core column (2) comprises core column concrete (2.1) and Core column reinforcement (2.2); the core column reinforcement (2.2) comprises core column longitudinal reinforcement (2.2a) and core column transverse reinforcement (2.2b); the core column longitudinal reinforcement (2.2a) is arranged along the entire length of the column shell; the column shell stirrups (1.2b) are located in the prefabricated column shell (1) and do not cross the core column reinforcement (2.2); the column shell longitudinal reinforcements (1.2a) of the upper and lower column sections are arranged correspondingly and connected as a whole, and the gap between the connection node areas is poured with node area filling material (4).
2. The reinforced concrete composite column according to claim 1, characterized in that: The strength of the column shell concrete (1.1) is not less than the strength of the core column concrete (2.1); and the node area filling material (4) is concrete or grouting material or UHPC.
3. The reinforced concrete composite column according to claim 1, characterized in that: The core column longitudinal reinforcement (2.2a) and the core column transverse reinforcement (2.2b) form a reinforcement cage; the core column transverse reinforcement (2.2b) has at least one closed stirrup; the core column longitudinal reinforcement (2.2a) is continuous in the connection node area of the upper and lower column sections.
4. The reinforced concrete composite column according to claim 3, characterized in that: The core column transverse reinforcement (2.2b) is reinforced in the connection node area between the upper and lower column sections, and the reinforcement method is that the spacing of the transverse reinforcement (2.2b) becomes smaller or the diameter becomes larger or the number of limbs is increased.
5. The reinforced concrete composite column according to claim 1, characterized in that: The cross-sectional shape of the inner wall of the prefabricated column shell (1) is circular or polygonal; the inner wall of the column shell is a rough surface and / or partially convex and / or has a shear key (3); the shear key is composed of steel bars and concrete.
6. The reinforced concrete composite column according to claim 1, characterized in that: The column shell longitudinal reinforcement (1.2a) is arranged along the circumference of the prefabricated column shell (1), and the column shell longitudinal reinforcement (1.2a) and the column shell stirrups (1.2b) form a reinforcement cage.
7. The reinforced concrete composite column according to claim 1, characterized in that: The column shell longitudinal ribs (1.2a) of the two column sections connected up and down are connected by a connecting piece (5) or by welding; the connecting piece (5) is a cold extruded sleeve or a threaded sleeve.
8. The reinforced concrete composite column according to claim 1, characterized in that: There are transverse steel bars between the node areas of the two upper and lower column sections, and the transverse steel bars are wrapped by the node area filling material (4).
9. The reinforced concrete composite column according to claim 1, characterized in that: The end of the column shell longitudinal reinforcement (1.2a) is provided with a transverse steel plate, and the transverse steel plate is fixedly connected to the column shell longitudinal reinforcement (1.2a).
10. A reinforced concrete composite column structure, characterized in that: The reinforced concrete composite column according to claim 1 is fixedly connected to the beam to form a frame; the longitudinal reinforcement of the beam is arranged between the connection node areas of the upper and lower column sections.