A fully prefabricated frame column brace-free beam-column node structure and its installation method

Abstract

The present invention is a fully prefabricated frame column support-free beam-column node structure and its installation method, the beam-column node structure includes a prefabricated column and a prefabricated beam; the prefabricated column includes a column body, a node connection assembly and a beam reinforcement connector; the prefabricated beam is a reinforced concrete structure, and the prefabricated beam is placed on a support platform of the node connection assembly and connected to each other. The installation method includes the following steps: Step 1, installing the prefabricated column at a designated position; Step 2, hoisting the prefabricated beam so that the end of the prefabricated beam is supported on the support platform, and the front and rear sides of the end of the prefabricated beam are limited by two side plates; Step 3, welding the embedded steel plate of the prefabricated beam to the support platform; Step 4, connecting the beam reinforcement of the prefabricated beam with the beam reinforcement connector; Step 5, pouring concrete on the top surface of the prefabricated beam so that the concrete covers the beam reinforcement and beam stirrups of the prefabricated beam. The advantage of the present invention is that it can achieve rapid rigid connection at the beam-column node, and no temporary support is required during the connection process.

Description

Technical Field

[0001] The invention relates to the field of assembled buildings, in particular to a fully prefabricated frame column brace-free beam-column node structure and an installation method thereof. Background Art

[0002] In existing prefabricated reinforced concrete structures, prefabricated columns are usually prefabricated in layers according to the floors, and sleeve grouting connection and other technologies are used at the beam-column nodes of each floor to achieve on-site connection of the column vertical reinforcement. The column reinforcement connection of the layered prefabrication scheme is costly and difficult. In addition, due to the limitation of the process level, the reliability of the sleeve grouting connection fluctuates greatly, which limits the engineering application of prefabricated concrete structures. At the same time, the integrity of the layered prefabrication scheme is poor. After completing the connection of the prefabricated columns and prefabricated beams, it is necessary to pour the node domain concrete, and the prefabricated components of the next layer can only be installed after the concrete reaches the expected strength.

[0003] The beam-column joint is the intersection of many steel bars, with dense steel bars, making construction difficult. The existing prefabrication scheme uses the same direction of the prefabricated beam end protruding steel bars to anchor into the nodes separately, and adopts the left-right avoidance or up-down avoidance method in spatial arrangement. While solving the installation possibility, it increases the number of node steel bars, making the node construction more difficult. Summary of the invention

[0004] The purpose of the present invention is to provide a fully prefabricated frame column support-free beam-column node structure and an installation method thereof, which can realize rapid rigid connection at the beam-column node, and the connection process does not require the provision of temporary supports.

[0005] The present invention is implemented by the following technical solution: a fully prefabricated frame column brace-free beam-column node structure, characterized in that it comprises prefabricated columns and prefabricated beams;

[0006] The prefabricated column comprises a column body, a node connection component and a beam reinforcement connector;

[0007] The column is a reinforced concrete structure, and the steel bars in the reinforced concrete structure are divided into a plurality of vertical steel bars and a plurality of stirrups; the stirrups are distributed from top to bottom and connected to the vertical steel bars, wherein the node connection components and the beam surface reinforcement connectors are arranged on the column for connecting with the prefabricated beams;

[0008] The node connection assembly includes a side plate, a bottom plate, bolts and a back plate; the bottom plate is rectangular as a whole and is cast integrally with the column, a reserved hole for vertical steel bars to pass through and for concrete pouring is provided in the middle of the bottom plate, and the left and right ends of the bottom plate extend out of the side walls of the column to form a support platform; a side plate is provided on the front and rear sides of any support platform, the two side plates of the support platform are parallel to each other and the bottom edges of the side plates are connected to the support platform; a back plate is connected to the bottom of any support platform, a number of bolts are provided on the inner side of the back plate, and the bolts are cast integrally with the column concrete; the two side plates on the front side and the two side plates on the rear side of the two support platforms are connected by connecting ribs distributed from top to bottom and passing through the column;

[0009] The beam reinforcement connector is located inside the column, and the left and right ends extend to the side walls of the column;

[0010] The precast beam is a reinforced concrete structure, and the steel bars in the reinforced concrete structure are divided into a plurality of beam bottom bars and a plurality of beam stirrups; the beam bottom bars extend in a left-right direction, the beam stirrups are distributed from left to right in the precast beam, and the beam bottom bars are arranged on the inner side of the bottom of the beam stirrups, the top ends of the beam stirrups extend out of the top surface of the precast beam, and the two top ends of the beam stirrups are bent toward each other to form a bent portion;

[0011] A pre-buried notch is provided at the bottom of one end of the prefabricated beam, and welding notches are provided on the front and rear side walls of the prefabricated beam located above the pre-buried notch; a pre-buried steel plate is provided at the pre-buried notch, and the pre-buried steel plate is welded to the beam bottom reinforcement;

[0012] The embedded steel plate of the prefabricated beam is placed on the supporting platform, and the embedded steel plate and the supporting platform are welded through a welding notch to achieve connection between the prefabricated beam and the prefabricated column;

[0013] A plurality of beam reinforcements are arranged on the top surface of the prefabricated beam, the ends of the beam reinforcements are connected to the beam reinforcement connectors, and the beam reinforcements and the bent parts are tied and connected to each other.

[0014] A method for installing a fully prefabricated frame column brace-free beam-column node structure comprises the following steps:

[0015] Step 1, installing the prefabricated column at the designated location;

[0016] Step 2, hoisting the precast beam so that the end of the precast beam is supported on the support platform, and the front and rear sides of the end of the precast beam are limited by two side plates;

[0017] Step 3, welding the embedded steel plate of the prefabricated beam and the supporting platform through the welding notch;

[0018] Step 4, laying beam reinforcement on the surface of the prefabricated beam, connecting the end of the beam reinforcement with the beam reinforcement connector, and then tying the beam reinforcement and the bending part together;

[0019] Step 5, pouring concrete on the top surface of the precast beam so that the concrete covers the beam surface reinforcement and beam stirrups of the precast beam.

[0020] Compared with the previous technology, the beneficial effects of the present invention are:

[0021] 1. The setting of node connection components can ensure the reliable transmission of shear force and bottom tension between prefabricated beam-column components, thereby realizing the installation process of prefabricated components without the need for temporary support. While realizing green construction, it can improve the safety and installation efficiency of the structural construction process. Specifically, the prefabricated beam is provided with beam surface reinforcement and beam bottom reinforcement, wherein the beam surface reinforcement is connected to the column through the beam surface reinforcement connector, thereby ensuring the reliable transmission of shear force between beam-column components; and the beam bottom reinforcement is first welded to the embedded steel plate, and then connected to the support platform through the embedded steel plate, thereby ensuring the reliable transmission of shear force and bottom tension between beam-column components.

[0022] 2. Corresponding node connection components and beam reinforcement connectors can be designed in concrete according to the number of layers. This design can reduce the number of hanging prefabricated vertical components (i.e. prefabricated columns) and significantly improve the installation efficiency of prefabricated structures. Due to integrated prefabrication, it also has significant advantages in installation accuracy.

[0023] 3. The bottom reinforcement of the beam is connected to the prefabricated column through a connecting component, which can significantly reduce the number of steel bars at the beam-column joint, significantly improve the concrete pouring conditions at the beam-column joint, and improve the quality of the prefabricated structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of a prefabricated column;

[0025] Figure 2 This is a perspective view of the precast column;

[0026] Figure 3 It is a schematic diagram of the structure of the node connection component;

[0027] Figure 4 for Figure 3 Exploded diagram of

[0028] Figure 5 It is the combined state layout diagram of the two node connection components in the same layer;

[0029] Figure 6 It is the combined state layout diagram of two beam reinforcement connectors on the same layer;

[0030] Figure 7 This is a structural diagram of a precast beam;

[0031] Figure 8 The perspective view of the precast beam after removing the stirrups;

[0032] Fig. 9The three-dimensional image of the precast beam after removing the embedded steel plate;

[0033] Fig.10 It is a schematic diagram of the overall structure of the present invention;

[0034] Fig.11 The effect diagram of installing and welding the transverse prefabricated beams;

[0035] Fig.12 The effect diagram of installing and welding the longitudinal prefabricated beams;

[0036] Fig.13 Schematic diagram of laying beam reinforcement on precast beam and connecting it with beam reinforcement connector.

[0037] Description of labels:

[0038] 1-precast column, 11-column, 111-vertical reinforcement, 112 stirrups, 12-node connection assembly, 121 side plate, 122 bottom plate, 123 studs, 124 back plate, 125 reserved holes, 126 support platform, 127 connecting bars, 13-beam reinforcement connector, 131 connecting rod, 132 sleeve;

[0039] 2-precast beam, 21-beam bottom reinforcement, 22-beam stirrups, 221-bending part, 23-embedded notch, 24-notch for welding, 25-embedded steel plate, 26 beam surface reinforcement. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the accompanying drawings:

[0041] like Figure 1-10 As shown: a fully prefabricated frame column brace-free beam-column node structure, comprising a prefabricated column 1 and a prefabricated beam 2;

[0042] The prefabricated column 1 comprises a column body 11, a node connection component 12 and a beam reinforcement connector 13;

[0043] The column 11 is a reinforced concrete structure, and the steel bars in the reinforced concrete structure are divided into a plurality of vertical steel bars 111 and a plurality of stirrups 112; the stirrups 112 are distributed from top to bottom and connected to the vertical steel bars 111, wherein the node connection assembly 12 and the beam surface reinforcement connector 13 are arranged on the column 11 for connecting with the prefabricated beam 2;

[0044] The node connection assembly 12 includes a side plate 121, a bottom plate 122, a bolt 123 and a back plate 124; the bottom plate 122 is rectangular as a whole and is cast integrally with the column 11. A reserved hole 125 for vertical reinforcement 111 to pass through and for concrete pouring is provided in the middle of the bottom plate 122. Both left and right ends of the bottom plate 122 extend out of the side wall of the column 11 to form a support platform 126; a side plate 121 is provided on the front and rear sides of any support platform 126. The two side plates 121 of the support 126 are parallel to each other and the bottom edge of the side plates 121 is connected to the support platform 126; the bottom of any support platform 126 is connected to a back plate 124, and the inner side of the back plate 124 is provided with a plurality of studs 123, and the studs 123 are integrally cast with the concrete of the column 11; the two side plates 121 located at the front side of the two support platforms 126 and the two side plates 121 located at the rear side are connected by connecting ribs 127 distributed from top to bottom and passing through the column 11;

[0045] The beam reinforcement connector 13 is located inside the column 11, and the left and right ends extend to the side walls of the column 11;

[0046] The precast beam 2 is a reinforced concrete structure, and the steel bars in the reinforced concrete structure are divided into a plurality of beam bottom bars 21 and a plurality of beam stirrups 22; the beam bottom bars 21 extend in the left-right direction, the beam stirrups 22 are distributed from left to right in the precast beam 2, and the beam bottom bars 21 are placed on the inner side of the bottom of the beam stirrups 22, the top ends of the beam stirrups 22 extend out of the top surface of the precast beam 2, and the two top ends of the beam stirrups 22 are bent toward each other to form a bent portion 221;

[0047] A pre-embedded notch 23 is provided at the bottom of one end of the precast beam 2, and welding notches 24 are provided on the front and rear side walls of the precast beam 2 located above the pre-embedded notch 23; a pre-embedded steel plate 25 is provided at the pre-embedded notch 23, and the pre-embedded steel plate 25 is welded to the beam bottom reinforcement 21;

[0048] The embedded steel plate 25 of the prefabricated beam 2 is placed on the supporting platform 126, and the embedded steel plate 25 and the supporting platform 126 are welded through the welding notch 24, so that the prefabricated beam 2 and the prefabricated column 1 are connected;

[0049] A plurality of beam reinforcements 26 are provided on the top surface of the prefabricated beam 2 , the ends of the beam reinforcements 26 are connected to the beam reinforcement connectors 13 , and the beam reinforcements 26 and the bent portions 221 are bound and connected to each other.

[0050] As far as reinforced concrete structures are concerned, the beam-column nodes need to transfer bending moments and ensure reliable transmission of tensile forces borne by the steel bars. In the present invention, the bottom reinforcement of the beam is connected by pre-embedded steel plates and plates left around the reserved holes 125 of the bottom plate 122. The beam surface reinforcement is connected to the beam surface reinforcement connector 13 to achieve the connection of the steel bars.

[0051] The present invention realizes that the beam surface reinforcement and the beam bottom reinforcement can be quickly connected at the beam-column node, wherein the beam bottom reinforcement is connected with the embedded steel plate 25, and after being installed on site, the embedded steel plate 25 and the support platform 126 of the bottom plate 122 are welded to realize reliable transmission of the tension of the beam bottom reinforcement; the corresponding beam surface reinforcement is directly connected to the beam surface reinforcement connector 13 embedded in the column 11 to realize reliable transmission of the tension of the beam surface reinforcement. At the same time, the present invention has the characteristics of low cost and fast on-site installation speed.

[0052] Generally speaking, the stirrups 112 and the vertical steel bars 111 are connected and fixed to each other, such as by tying them together with iron wires.

[0053] like Figure 6 As shown, the beam reinforcement connector 13 includes a connecting rod 131 and a sleeve 132, and the sleeve 132 is respectively connected to the connecting rod 131. The beam reinforcement extends into the sleeve 132 to achieve connection with the beam reinforcement connector 13.

[0054] like Figure 5 , 6 As shown: Generally speaking, the column 11 has four sidewalls. When the column 11 is located on the same floor, two node connection components 12 and two beam reinforcement connectors 13 are distributed, and the two node connection components 12 are staggered vertically and horizontally while being staggered vertically, and the two beam reinforcement connectors 13 are staggered vertically and horizontally while being staggered vertically.

[0055] A method for installing a fully prefabricated frame column brace-free beam-column node structure comprises the following steps:

[0056] Step 1, installing the prefabricated column 1 at a designated location;

[0057] Step 2, hoist the precast beam 2 so that the end of the precast beam 2 is supported on the support platform 126, and the front and rear sides of the end of the precast beam 2 are limited by two side plates 121 (such as Fig.11 , 12 shown);

[0058] Step 3, welding the embedded steel plate 25 of the prefabricated beam 2 and the supporting platform 126 through the welding notch 24 (such as Fig.11 , 12 shown);

[0059] Step 4: Arrange the beam reinforcement 26 on the surface of the prefabricated beam 2, connect the end of the beam reinforcement 26 to the beam reinforcement connector 13, and then tie the beam reinforcement 26 and the bending portion 221 together (such as Fig.13 , 10 shown);

[0060] Step 5, pouring concrete on the top surface of the precast beam 2 so that the concrete covers the beam surface reinforcement 26 and the beam stirrups 22 of the precast beam 2.

[0061] When pouring concrete, formwork can be poured in designated areas.

[0062] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully prefabricated frame column brace-free beam-column node structure, characterized in that: It comprises a prefabricated column (1) and a prefabricated beam (2); The prefabricated column (1) comprises a column body (11), a node connection component (12) and a beam reinforcement connector (13); The column (11) is a reinforced concrete structure, wherein the steel bars in the reinforced concrete structure are divided into a plurality of vertical steel bars (111) and a plurality of stirrups (112); the stirrups (112) are distributed from top to bottom and connected to the vertical steel bars (111), wherein the node connection assembly (12) and the beam surface reinforcement connector (13) are arranged on the column (11) for connecting to the prefabricated beam (2); The node connection assembly (12) comprises a side plate (121), a bottom plate (122), a bolt (123) and a back plate (124); the bottom plate (122) is rectangular in shape and is integrally cast with the column (11); a reserved hole (125) for allowing a vertical steel bar (111) to pass through and for concrete pouring is provided in the middle of the bottom plate (122); both left and right ends of the bottom plate (122) extend out of the side wall of the column (11) to form a support platform (126); a side plate (121) is provided on the front and rear sides of any support platform (126); the support platform (126) is provided with a plurality of side plates (121) and a plurality of side plates (121) are provided on the back and rear sides of each support platform (126); 26) are parallel to each other and the bottom edges of the side plates (121) are connected to the support platform (126); a back plate (124) is connected to the bottom of any one of the support platforms (126); a plurality of bolts (123) are provided on the inner side of the back plate (124), and the bolts (123) are integrally cast with the concrete of the column (11); the two side plates (121) located at the front side of the two support platforms (126) and the two side plates (121) located at the rear side are connected by connecting ribs (127) that are distributed from top to bottom and pass through the column (11); The beam reinforcement connector (13) is located inside the column (11), and the left and right end ends extend to the side walls of the column (11); The precast beam (2) is a reinforced concrete structure, wherein the steel bars in the reinforced concrete structure are divided into a plurality of beam bottom bars (21) and a plurality of beam stirrups (22); the beam bottom bars (21) extend in a left-right direction, the beam stirrups (22) are distributed from left to right in the precast beam (2), and the beam bottom bars (21) are placed on the inner side of the bottom of the beam stirrups (22); the top ends of the beam stirrups (22) extend out of the top surface of the precast beam (2), and the two top ends of the beam stirrups (22) are bent toward each other to form a bent portion (221); A pre-embedded notch (23) is provided at the bottom of one end of the prefabricated beam (2), and welding notches (24) are provided on the front and rear side walls of the prefabricated beam (2) located above the pre-embedded notch (23); a pre-embedded steel plate (25) is provided at the pre-embedded notch (23), and the pre-embedded steel plate (25) is welded to the beam bottom reinforcement (21); The embedded steel plate (25) of the prefabricated beam (2) is placed on the support platform (126), and the embedded steel plate (25) and the support platform (126) are welded via the welding notch (24), so that the prefabricated beam (2) and the prefabricated column (1) are connected; A plurality of beam reinforcements (26) are provided on the top surface of the prefabricated beam (2), the ends of the beam reinforcements (26) are connected to the beam reinforcement connectors (13), and the beam reinforcements (26) and the bent portions (221) are tied and connected to each other; The stirrups (112) and the vertical steel bars (111) are connected and fixed to each other; When the column (11) is located on the same floor and two node connection components (12) and two beam reinforcement connectors (13) are distributed, the two node connection components (12) are distributed in a longitudinal and transverse staggered manner and are vertically dislocated, and the two beam reinforcement connectors (13) are distributed in a longitudinal and transverse staggered manner and are vertically dislocated.

2. A fully prefabricated frame column brace-free beam-column node structure according to claim 1, characterized in that: The beam reinforcement connector (13) comprises a connecting rod (131) and a sleeve (132), wherein the sleeve (132) is respectively connected to the connecting rod (131).

3. The method for installing a fully prefabricated frame column brace-free beam-column node structure according to any one of claims 1 to 2, characterized in that: The steps include: Step 1, installing the prefabricated column (1) at a designated location; Step 2, hoisting the prefabricated beam (2) so that the end of the prefabricated beam (2) is supported on the support platform (126), and at the same time, the front and rear sides of the end of the prefabricated beam (2) are limited by two side plates (121); Step 3, welding the embedded steel plate (25) of the prefabricated beam (2) and the supporting platform (126) through the welding notch (24); Step 4, laying beam reinforcement (26) on the surface of the prefabricated beam (2), connecting the end of the beam reinforcement (26) to the beam reinforcement connector (13), and then tying the beam reinforcement (26) and the bent portion (221) together; Step 5, pouring concrete on the top surface of the precast beam (2), so that the concrete covers the beam surface reinforcement (26) and the beam stirrups (22) of the precast beam (2).

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