Semi-steel connection beam column joint and prefabricated bracket assembly

Abstract

The utility model relates to the technical field of building construction, and particularly discloses a semi-steel connection beam column joint and a prefabricated bracket assembly. The beam-column joint comprises a column, a prefabricated beam and a prefabricated bracket assembly, longitudinal steel bars of the column are arranged at the four corners in a concentrated mode, the prefabricated bracket assembly penetrates through column steel bars through through holes and then is fixed, a support component and a disassembly-free baffle component are arranged, and the beam-column joint is formed through post-pouring; one end of each precast beam is placed on the support component, upper longitudinal steel bars of the precast beams are connected through end stress steel plates, and the end steel plates of all the precast beams are welded to the polygonal steel plate in the center of the joint. The steel plates replace hogging moment steel bars in a beam-column joint area, the construction procedures are greatly simplified through steel plate connection and prefabricated beam-slab support-free installation, the construction efficiency is improved, the construction cost is reduced, and meanwhile the excellent anti-seismic performance is achieved. The corbel and the column are prefabricated in a split mode, so that production and transportation efficiency is improved, the formwork and support working procedures are thoroughly omitted, and building efficiency and construction safety are improved.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology and relates to a semi-steel connecting beam-column node and a prefabricated corbel component. Background Technology

[0002] In conventional precast concrete structures, the standard connection between precast beams and columns typically involves reserving a joint area for post-casting. In this method, the precast beams and columns require extended reinforcing bars anchored within the post-cast joint area to ensure the joint's load-bearing capacity. While this structure provides reliable load transfer, it presents significant drawbacks. First, the collision of reinforcing bars in the joint area, leading to installation difficulties, has become a major industry concern. Although the number of reinforcing bars extending into the supports at the lower beam ends can be minimized according to design specifications, it is difficult to reduce the number of reinforcing bars at the upper negative moment load-bearing ends. On construction sites, there are still numerous issues with large quantities, large diameters, and dense arrangement of reinforcing bars, making installation extremely difficult and compromising the quality of concrete pouring. Furthermore, the conventional practice involves extremely cumbersome procedures for installing and dismantling formwork and supports in the joint area, especially in projects with large floor heights and spans, posing significant construction safety hazards. Utility Model Content

[0003] In view of this, the purpose of this utility model is to solve the above problems and provide a semi-steel connecting beam-column node and a prefabricated corbel assembly.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A precast corbel assembly for beam-column joint connection includes a corbel assembly, a non-removable baffle component, and a support component. The corbel assembly has through holes for the longitudinal reinforcement of the column to pass through. The through holes are located inside the non-removable baffle component. One or more sides of the corbel assembly have protruding support components as supports for the precast beam. The non-removable baffle component is L-shaped and fixed between two adjacent support components. Each support component and the non-removable baffle components on both sides together form a U-shaped notch for placing the precast beam. All non-removable baffle components enclose the post-cast area of ​​the beam-column joint.

[0006] Furthermore, the horizontal projection of the bracket assembly is polygonal, and the horizontal projection size of the through hole on the bracket assembly is smaller than the cross-sectional size of the column it connects to. The specific size is sufficient to allow for temporary placement and grouting of the prefabricated bracket assembly. The bracket assembly is made of concrete and has reinforcing steel bars arranged inside it.

[0007] Furthermore, the removable baffle component is made of concrete or cement fiber, and reinforcing bars are arranged inside the removable baffle component. These reinforcing bars extend from the upper and lower ends of the removable baffle component for anchoring connection.

[0008] Furthermore, the prefabricated corbel assembly is either an integral prefabricated structure or a modular assembly and connection structure.

[0009] A semi-steel beam-column joint includes a column, a precast beam, and a precast corbel assembly for beam-column joint connection as described above. The longitudinal reinforcement of the column is concentrated at the four corners, and the precast corbel assembly is located at the upper end of the column, with the longitudinal reinforcement of the column passing through through holes in the corbel assembly. The precast beam is located on the four sides of the column, with one end resting on the support component of the precast corbel assembly. The non-removable baffle components of the precast corbel assembly are located on both sides of the precast beam, and all the non-removable baffle components and the precast beam enclose the central post-cast area.

[0010] The upper longitudinal reinforcement of the precast beam is welded to an end-load-bearing steel plate in the beam end area, and the lower longitudinal reinforcement of the precast beam extends out of the beam end concrete interface and is anchored in the post-cast area; all the end-load-bearing steel plates of the precast beam are welded together by a polygonal steel plate located at the center of the node.

[0011] Furthermore, the column is a precast column or a cast-in-place column, with the longitudinal reinforcement extending beyond the top section of the column and exceeding the elevation of the precast floor slab of that floor. The top of the column is provided with a rectangular groove, and the horizontal projection of the rectangular groove overlaps with the horizontal projection of the through hole on the corbel assembly to ensure the fluidity of the concrete pouring.

[0012] Furthermore, the end-load-bearing steel plate of the precast beam is rectangular, and its extension length at the beam end is equal to the thickness of the concrete cover of the column, so that the stirrups in the beam-column joint area can be installed smoothly.

[0013] Furthermore, the precast beam has shear keyways at the concrete interface at its beam ends.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model eliminates the upper reinforcement of the beam end negative bending moment in the beam-column joint area and uses steel plates for reliable connection, which greatly simplifies the construction and installation process. At the same time, this utility model strictly limits the amount of steel plates used, that is, only the connecting load-bearing steel plates are set at the upper part of the beam end negative bending moment. With the reasonable and optimized arrangement of the longitudinal reinforcement in the column and the lower longitudinal reinforcement at the beam end, the cost can be reduced as much as possible while ensuring on-site construction efficiency.

[0016] 2. This utility model possesses excellent structural seismic performance. The seismic performance of the joint method using steel plates for reliable connection is superior to that of traditional methods. Furthermore, the steel plates are ultimately encased in concrete, eliminating the need for fireproofing and corrosion protection measures, making it more economical than traditional steel structure connection joints.

[0017] 3. This utility model solves the difficulties in the production and transportation of precast columns with corbels. By prefabricating the corbel components and the precast columns separately, it can significantly improve factory production efficiency and component transportation efficiency. This utility model completely eliminates the formwork and support processes in traditional methods, greatly improving construction efficiency and reducing construction safety hazards.

[0018] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a three-dimensional view of the semi-steel connecting beam-column node in this utility model.

[0021] Figure 2 This is a schematic diagram of a prefabricated corbel assembly in this utility model.

[0022] Figure 3 for Figure 2 Parts unfolded diagram of the prefabricated corbel assembly.

[0023] Figure 4 This is another structural schematic diagram of the prefabricated corbel component in this utility model.

[0024] Figure 5 for Figure 4 Parts unfolded diagram of the prefabricated corbel assembly.

[0025] Figure 6 A schematic diagram of the structure of the central column of this utility model.

[0026] Figure 7 This is a schematic diagram of the prefabricated corbel assembly installed on the column in this utility model.

[0027] Figure 8 This is a schematic diagram of the precast beam structure in this utility model.

[0028] Figure 9 , 10 Figures 1 and 11 are schematic diagrams of the construction process of the beam-column joint in this utility model.

[0029] Attached icons: 1-Column; 2-Precast beam; 3-Precast corbel assembly; 4-Polygonal steel plate; 5-Floor slab; 6-Stirrup; 21-End load-bearing steel plate; 22-Lower longitudinal reinforcement; 23-Shear keyway; 31-Corbel assembly; 32-Support component; 33-Removable baffle component. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and descriptions in the drawings may be omitted.

[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] See also Figures 1-11This is a precast corbel assembly for beam-column joint connection, including corbel assembly 31, non-removable baffle component 33, and support component 32; the corbel assembly 31 is provided with through holes for the longitudinal reinforcement of the column to pass through; the through holes are all located inside the non-removable baffle component 33; the four sides of the corbel assembly 31 are provided with protruding support components 32 as supports for the precast beam 2; the non-removable baffle component 33 is L-shaped and fixedly installed between two adjacent support components 32; each support component 32 and the non-removable baffle components 33 on both sides together form a U-shaped notch for placing the precast beam 2; all non-removable baffle components 33 enclose the post-cast area of ​​the beam-column joint.

[0034] The horizontal projection of the corbel assembly 31 is polygonal, and the horizontal projection size of the through hole on the corbel assembly 31 is smaller than the cross-sectional size of column 1. The specific size is sufficient for the temporary placement and grouting of the precast corbel assembly. The corbel assembly 31 is made of concrete and has reinforcing steel bars inside. The removable baffle component 33 is made of concrete or cement fiber and has reinforcing steel bars inside. These reinforcing steel bars extend from the upper and lower ends of the removable baffle component 33 for anchoring connection.

[0035] Among them, the prefabricated corbel component 3 is either an integral prefabricated structure or a separate assembly and connection structure.

[0036] A semi-steel beam-column joint includes a column 1, a precast beam 2, and a precast corbel assembly 3 as described above. The longitudinal reinforcement of the column 1 is concentrated at the four corners, and the precast corbel assembly 3 is set at the upper end of the column 1. The longitudinal reinforcement of the column 1 passes through the through holes on the corbel assembly 31. The precast beam 2 is located on the four sides of the column 1, and one end rests on the support component 32 of the precast corbel assembly 3. The non-removable baffle component 33 of the precast corbel assembly 3 is located on both sides of the precast beam 2. All the non-removable baffle components 33 and the precast beam 2 enclose the central post-cast area.

[0037] The upper longitudinal reinforcement of the precast beam 2 is welded to an end-loaded steel plate 21 in the beam end area, and the lower longitudinal reinforcement 22 of the precast beam 2 extends out of the beam end concrete interface and is anchored in the post-cast area; all the end-loaded steel plates 21 of the precast beam 2 are welded together by a polygonal steel plate 4.

[0038] Column 1 is a precast or cast-in-place column. The longitudinal reinforcement of column 1 extends out of the top section of column 1 and exceeds the elevation of the precast floor slab 5 of that floor. A rectangular groove is provided at the top of column 1. The horizontal projection of the rectangular groove overlaps with the horizontal projection of the through hole on the corbel assembly 31 to ensure the fluidity of the concrete pouring.

[0039] The precast beam 2 has a rectangular end-load-bearing steel plate 21, the length of which extends from the beam end is equal to the thickness of the concrete cover of column 1, so that the stirrups 6 in the beam-column joint area can be installed smoothly. The concrete interface at the beam end of the precast beam 2 is provided with a shear keyway 23.

[0040] A support-free construction method for the semi-steel beam-column joint described above includes the following steps:

[0041] (1) Precast corbel components 3 and precast beams 2 are manufactured in the factory. When column 1 is a precast column, the precast column is manufactured in the factory and the precast column is hoisted into place first, and then the precast corbel components 3 are hoisted. When column 1 is cast in place, the column is first cast in place and cured until the design strength is reached, and then the precast corbel components 3 are hoisted. When hoisting the precast corbel components 3, the through hole of the precast corbel components 3 is passed through the longitudinal reinforcement of column 1, and after adjustment and positioning, concrete is poured to fill the through hole.

[0042] When manufacturing the precast corbel component 3, an integral molding and casting method can be used, or the support component 32 and the non-removable baffle component 33 can be manufactured first. When pouring the concrete of the corbel component 31, the protruding steel bars of the support component 32 and the non-removable baffle component 33 can be inserted into the upper surface of the corbel component 31 and fixed, thus forming the precast corbel component 3. Alternatively, the support component 32, the non-removable baffle component 33, and the corbel component 31 can be manufactured separately. In this case, the small-diameter stressed steel bars of the support component 32 and the non-removable baffle component 33 can not protrude from the lower section. Then, external anchoring connectors are used to assemble and fix the various components, thus forming the precast corbel component 3.

[0043] (2) Hoist the precast beam 2 and place the beam end on the precast corbel assembly 3, and adjust it into position;

[0044] (3) Hoisting and binding of stirrups 6 in the beam-column joint area;

[0045] (4) Use a polygonal steel plate 4 to weld the beam end load-bearing steel plate placed on the four sides of the column 1 on the precast beam 2.

[0046] (5) Hoist the precast floor slab 5, and use the non-removable baffle component 33 as a template for the post-cast concrete in the node area, and pour the node concrete of this floor.

[0047] (6) When column 1 is a precast column, the precast column of the upper layer is hoisted. When column 1 is cast in place, the longitudinal reinforcement of the column of the upper layer is installed. Then the longitudinal reinforcement of the upper and lower columns is quickly connected by grouting sleeves or mechanical sleeves.

[0048] During construction, the longitudinal steel bars 22 at the bottom of the precast beam 2 need to be arranged in a precise manner to avoid collisions when they extend into the beam-column joint area.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A prefabricated corbel assembly for beam-column joint connections, characterized in that: The system includes a corbel assembly, a non-removable baffle component, and a support component. The corbel assembly has a through hole for the longitudinal reinforcement of the column to pass through. The through hole is located inside the non-removable baffle component. One or more sides of the corbel assembly have protruding support components as supports for the precast beam. The non-removable baffle component is L-shaped and fixed between two adjacent support components. Each support component and the non-removable baffle components on both sides together form a U-shaped notch for placing the precast beam. All non-removable baffle components enclose the post-cast area of ​​the beam-column joint.

2. The prefabricated corbel assembly for beam-column joint connection according to claim 1, characterized in that: The horizontal projection of the bracket assembly is polygonal, and the horizontal projection size of the through hole on the bracket assembly is smaller than the cross-sectional size of the column it connects to; the bracket assembly is made of concrete and has reinforcing steel bars arranged inside it.

3. The prefabricated corbel assembly for beam-column joint connection according to claim 1, characterized in that: The removable baffle component is made of concrete or cement fiber and has reinforcing steel bars inside. These reinforcing steel bars extend from the upper and lower ends of the removable baffle component for anchoring connection.

4. The prefabricated corbel assembly for beam-column joint connection according to claim 1, characterized in that: The prefabricated corbel assembly is either an integral prefabricated structure or a modular assembly and connection structure.

5. A semi-steel beam-column joint, characterized in that: The system includes columns, precast beams, and precast corbel assemblies for beam-column joint connections as described in any one of claims 1 to 4; the longitudinal reinforcement of the column is concentrated at the four corners, the precast corbel assembly is located at the upper end of the column, and the longitudinal reinforcement of the column passes through through holes in the corbel assembly; the precast beams are located on the four sides of the column, and one end rests on the support component of the precast corbel assembly; the non-removable baffle components of the precast corbel assembly are located on both sides of the precast beam, and all the non-removable baffle components and the precast beams enclose the central post-cast area; The upper longitudinal reinforcement of the precast beam is welded to an end-load-bearing steel plate in the beam end area, and the lower longitudinal reinforcement of the precast beam extends out of the beam end concrete interface and is anchored in the post-cast area; all the end-load-bearing steel plates of the precast beam are welded together by a polygonal steel plate located in the center.

6. The semi-steel beam-column joint according to claim 5, characterized in that: The column is a precast column or a cast-in-place column. The longitudinal reinforcement of the column extends out of the top section of the column and exceeds the elevation of the precast floor slab of that floor. The top of the column is provided with a rectangular groove. The horizontal projection of the rectangular groove overlaps with the horizontal projection of the through hole on the corbel assembly.

7. The semi-steel beam-column joint according to claim 5, characterized in that: The end bearing steel plate of the precast beam is rectangular, and its extension length at the beam end is equal to the thickness of the concrete protective layer of the column.

8. The semi-steel beam-column joint according to claim 5, characterized in that: The precast beam has shear keyways at the concrete interface at its beam end.

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