A support-free assembled beam-column node structure and installation method thereof

Abstract

The present invention is a support-free assembled beam-column node structure and its installation method, wherein the beam-column node structure comprises a precast column and a precast beam; the precast column is a reinforced concrete column structure, and the precast column is provided with a node area where concrete is not poured; a node connection assembly is provided at the lower part of the node area; the precast beam is a trough beam, and the trough beam is erected on the node connection assembly and the trough beam is provided with beam reinforcement extending into the node area; cast-in-place concrete is poured in the node area and the trough beam. The installation method comprises the following steps: installing the precast column at a designated position; hoisting the precast beam so that the end of the precast beam is supported on a U-shaped corbel; laying and tying the beam reinforcement; and finally laying a template on both sides of the precast beam and around the node area and pouring concrete. The provision of the node connection assembly of the present invention can ensure the reliable transmission of shear force between precast beam-column components, thereby realizing that there is no need to set up temporary supports during the installation of precast components, and can improve the safety and installation efficiency during the structural construction process.

Description

Technical Field

[0001] The invention relates to the field of assembled buildings, in particular to a support-free assembled 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 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, concrete needs to be cast in place to ensure the strength of the nodes before the prefabricated components of the next floor can be installed.

[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 object of the present invention is to provide a support-free assembled beam-column node structure and an installation method thereof, which can realize rapid connection at the beam-column node and does not require temporary support during the connection process.

[0005] The present invention is implemented through the following technical solutions: a support-free assembled beam-column node structure, comprising a prefabricated column and a prefabricated beam;

[0006] The precast column is a reinforced concrete column structure, and the beam-column joint of the precast column is a node area connected by vertical steel bars and not poured with concrete;

[0007] The lower part of the node area is enclosed by multiple back plates to form a node connection assembly; a reinforcement notch is provided in the middle of the upper edge of any back plate, and at least a portion of the outer wall of the back plate is provided with a U-shaped bracket that fits the edge of the reinforcement notch, and a plurality of bolts are connected to the lower inner wall of any back plate; a steel mesh is also provided inside the node connection assembly and above the bolts;

[0008] The precast beam is a trough beam with a groove, and the beam surface of the trough beam is provided with beam stirrups extending upward; the end of the precast beam is mounted on a U-shaped corbel, and beam reinforcement extending into the node area is arranged from top to bottom in the groove of the trough beam;

[0009] Stirrups are arranged from top to bottom in the node area, enclosing the vertical reinforcements, and the beam reinforcements are supported on the stirrups;

[0010] In-situ concrete is poured in the node area of ​​the precast column and the trough beam, and the cast-in-situ concrete covers the vertical steel bars and stirrups in the node area and the beam steel bars and stirrups of the trough beam.

[0011] A method for installing a support-free assembled beam-column node structure comprises the following steps:

[0012] Step 1, installing the prefabricated column at the designated location;

[0013] Step 2, hoisting the precast beam so that the end of the precast beam is supported on the U-shaped bracket;

[0014] Step 3, a plurality of reinforcement delivery devices are sequentially arranged on the longitudinal precast beams according to the extension direction of the precast beams, the beam reinforcement is placed on the reinforcement delivery devices, and the beam reinforcement is pushed into the node area of ​​the precast column or through the node area to another longitudinal precast beam; the beam reinforcement is lifted by a lifting rope bypassing the beam reinforcement, and the reinforcement delivery device is taken out to lower the beam reinforcement to the bottom of the groove to form the beam bottom reinforcement;

[0015] Step 4, repeat the operation of step 3 to complete the layout of the bottom reinforcement of the transverse precast beam; then complete the layout of the stirrups from top to bottom in the node area; at the same time, the stirrups and the bottom reinforcement of the beam are tied to each other;

[0016] Step 5, a plurality of reinforcement delivery devices are sequentially arranged on the longitudinal precast beams according to the extension direction of the precast beams, the beam reinforcement is placed on the reinforcement delivery devices, and the beam reinforcement is pushed into the node area of ​​the precast column or through the node area to another longitudinal precast beam; the beam reinforcement is lifted by a lifting rope bypassing the beam reinforcement, and the reinforcement delivery device is taken out to support the beam reinforcement on the stirrups to form beam surface reinforcement; and the stirrups and the beam surface reinforcement are tied to each other;

[0017] Step 6, repeat the operation of step 5 to complete the layout of the beam reinforcement of the transverse precast beam;

[0018] Step 7, lay formwork on both sides of the precast beam and around the node area, and pour concrete so that the concrete covers the vertical steel bars and stirrups in the node area and the beam steel bars and stirrups of the trough beam.

[0019] Compared with the previous technology, the beneficial effects of the present invention are:

[0020] 1. The setting of node connection components can ensure the reliable transmission of shear force between prefabricated beam-column components, thereby eliminating the need for temporary supports during the installation of prefabricated components. While achieving green construction, it can improve the safety and installation efficiency of the structural construction process.

[0021] 2. Prefabrication of multi-layer concrete columns can reduce the number of hangers and significantly improve the installation efficiency of prefabricated structures. Due to the integrated prefabrication, there are also significant advantages in installation accuracy. Since the number of on-site steel bar connections is reduced, the installation cost can be significantly reduced.

[0022] 3. The bottom reinforcement of the beam is set in the groove of the precast beam, which can reduce the number of beam reinforcements passing through the post-cast node by half, significantly improve the concrete pouring conditions at the beam-column node, and improve the quality of the precast structure.

[0023] 4. During the horizontal pushing of beam reinforcement, a reinforcement delivery device is used to reduce the difficulty of pushing the beam reinforcement and improve construction efficiency.

[0024] 5. The U-shaped corbel can be flexibly arranged according to the layout of the prefabricated beams, which effectively saves costs and has no obvious protrusions at the joints. It is consistent with the indoor effect of the cast-in-place structure and has no adverse effects on the building's use function. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a prefabricated column;

[0026] Figure 2 It is a schematic diagram of the structure of the node connection component;

[0027] Figure 3 for Figure 2 Exploded diagram of

[0028] Figure 4 This is a structural diagram of a precast beam;

[0029] Figure 5 This is the overall effect diagram after the combination of the present invention;

[0030] Figure 6 This is a rendering of the installation of precast beams on precast columns;

[0031] Figure 7 This is the effect diagram after the reinforcement delivery device is installed on the longitudinal precast beam;

[0032] Figure 8 This is a rendering of placing beam reinforcement on the longitudinal precast beam;

[0033] Fig. 9 For Figure 8 The effect picture after the beam reinforcement is pushed on the foundation and the hanging rope is wound;

[0034] Fig.10 For Fig. 9 The effect picture after the beam reinforcement is hoisted on the foundation and the reinforcement delivery device is taken out;

[0035] Fig.11 For Fig.10The effect diagram of the beam reinforcement placement completed on the foundation to become the beam bottom reinforcement;

[0036] Fig.12 This is the effect diagram after the reinforcement delivery device is installed on the transverse precast beam;

[0037] Fig.13 For Fig.12 The effect picture after the beam reinforcement is pushed on the foundation and the hanging rope is wound;

[0038] Fig.14 For Fig.13 The effect diagram of the beam reinforcement placement completed on the foundation to become the beam bottom reinforcement;

[0039] Fig.15 This is the effect diagram of arranging stirrups in the node area;

[0040] Fig.16 This is the effect diagram of the stirrups being arranged from top to bottom in the node area;

[0041] Fig.17 This is the effect diagram after the reinforcement delivery device is installed again on the longitudinal precast beam;

[0042] Fig.18 For Fig.17 The effect diagram of placing beam reinforcement for the second time on the foundation;

[0043] Fig.19 For Fig.18 The effect diagram of taking out the reinforcement delivery device from the foundation;

[0044] Fig. 20 The effect diagram after installing the reinforcement delivery device again on the transverse precast beam and completing the beam reinforcement delivery;

[0045] Fig.21 For Fig. 20 The effect diagram of taking out the reinforcement delivery device from the foundation;

[0046] Fig. 22 The effect diagram of placing precast beams on two adjacent faces in the node connection component;

[0047] Fig.23 It is a structural schematic diagram of the reinforcement delivery device.

[0048] Description of labels:

[0049] 1-precast column, 11-node area, 12-vertical reinforcement, 13-stirrups;

[0050] 2- precast beam, 21- beam stirrups, 22- beam reinforcement, 221- beam bottom reinforcement, 222- beam surface reinforcement, 23- groove;

[0051] 3-node connection assembly, 31-back plate, 32-rib delivery notch, 33-U-shaped bracket, 34-bolt, 35-steel mesh;

[0052] 4-rib delivery device, -41 bearing seat, 42 roller. DETAILED DESCRIPTION

[0053] The present invention is described in detail below in conjunction with the accompanying drawings:

[0054] like Figure 1-5 As shown: a support-free assembled beam-column node structure, comprising a prefabricated column 1 and a prefabricated beam 2;

[0055] The precast column 1 is a reinforced concrete column structure, and the beam-column node of the precast column 1 is a node area 11 connected by vertical steel bars 12 and not poured with concrete;

[0056] The lower part of the node area 11 is enclosed by a plurality of back plates 31 to form a node connection component 3; a reinforcement notch 32 is provided in the middle of the upper edge of any back plate 31, and at least part of the outer wall of the back plate 31 is provided with a U-shaped bracket 33 that fits the edge of the reinforcement notch 32, and a plurality of studs 34 are connected to the lower inner wall of any back plate 31; a steel mesh 35 is also provided inside the node connection component 3 and above the studs 34;

[0057] The precast beam 2 is a trough beam (also called a U-shaped beam) with a groove 23, and the beam surface of the trough beam is provided with a beam stirrup 21 extending upward; the end of the precast beam 2 is mounted on the U-shaped corbel 33, and the groove 23 of the trough beam is provided with a beam reinforcement 22 extending into the node area 11 from top to bottom;

[0058] Stirrups 13 are provided from top to bottom at the node area 11 and surround the vertical reinforcement 12, and the beam reinforcement 22 is supported on the stirrups 13;

[0059] In-situ concrete is poured in the node area 11 of the precast column 1 and the trough beam, and the cast-in-situ concrete covers the vertical steel bars 12 and stirrups 13 of the node area 11 and the beam steel bars 22 and stirrups 21 of the trough beam.

[0060] Here, the number of node areas 11 is set to be more than one according to the height of the prefabricated column 1 and the number of nodes.

[0061] Here, the U-shaped corbel 33 is welded according to the number of prefabricated beams 2. If the prefabricated beams need to be installed in adjacent or opposite positions, the U-shaped corbel 33 is installed on the designated back plate 31; correspondingly, if prefabricated beams need to be installed in three or four directions, the U-shaped corbel 33 is installed on the designated back plate 31.

[0062] The purpose of setting up the steel mesh 35 is to ensure that when the concrete is poured in sections, the roughness of the connection surface between the new and old concrete can be guaranteed, thereby ensuring the connection strength of the concrete interface.

[0063] The beam reinforcement 22 is divided into a beam bottom reinforcement 221 located at the bottom of the groove 23 of the groove beam and a beam surface reinforcement 222 located at the top surface of the groove 23 of the groove beam.

[0064] like Fig.23 As shown, the reinforcing bar delivery device 4 is also included, and the reinforcing bar delivery device 4 includes two bearing seats 41, two bearings and a roller 42. The two bearings are mounted on the bearing seats 41, and the two ends of the roller 42 are respectively mounted on the two bearings. The reinforcing bar delivery device 4 here is mainly used to horizontally transport the beam reinforcement 22 placed on the precast beam 2, so that it slides into the node area 11, and the beam reinforcement 22 can be transported to the precast beam 2 on the other side when necessary.

[0065] The stirrups 13 are tied to the vertical steel bars 12 by iron wires. The stirrups 13 here can be tied to the vertical steel bars 12 at the beginning, untied when needed, and tied to the vertical steel bars 12 again after being laid from top to bottom. They can also be set on site later and then tied to the vertical steel bars 12.

[0066] like Figure 6-22 As shown: A method for installing a support-free assembled beam-column node structure, comprising the following steps:

[0067] Step 1, installing the prefabricated column 1 at a designated location;

[0068] Step 2, hoist the prefabricated beam 2 so that the end of the prefabricated beam 2 is supported on the U-shaped bracket 33 (such as Figure 6 shown);

[0069] Step 3, a plurality of reinforcement delivery devices 4 are sequentially arranged on the longitudinal precast beam 2 according to the extension direction of the precast beam 2, the beam reinforcement 22 is placed on the reinforcement delivery device 4, and the beam reinforcement 22 is pushed into the node area 11 of the precast column 1 or passes through the node area 11 to another longitudinal precast beam 2; the beam reinforcement 22 is lifted by a lifting rope bypassing the beam reinforcement 22, and the beam reinforcement 22 is lowered to the bottom of the groove 23 to form the beam bottom reinforcement 221 (as shown in Figures 7-11) by taking out the reinforcement delivery device 4;

[0070] Step 4, repeat the operation of step 3 to complete the layout of the bottom reinforcement 221 of the transverse precast beam 2; then complete the layout of the stirrups 13 from top to bottom in the node area 11; at the same time, the stirrups 13 and the bottom reinforcement 221 are tied to each other; (as shown in Figures 12-16);

[0071] Step 5, a plurality of reinforcement delivery devices 4 are sequentially arranged on the longitudinal precast beam 2 according to the extension direction of the precast beam 2, the beam reinforcement 22 is placed on the reinforcement delivery device 4, and the beam reinforcement 22 is pushed into the node area 11 of the precast column 1 or passes through the node area 11 to another longitudinal precast beam 2; the beam reinforcement 22 is lifted by a lifting rope bypassing the beam reinforcement 22, and the beam reinforcement 22 is supported on the stirrup 13 to form the beam surface reinforcement 222 by taking out the reinforcement delivery device 4; at the same time, the stirrup 13 and the beam surface reinforcement 222 are tied to each other; (such as Figure 17-19 shown);

[0072] Step 6, repeat the operation of step 5 to complete the layout of the beam reinforcement 222 of the transverse prefabricated beam 2 (such as Figure 20-21 shown);

[0073] Step 7, laying formwork on both sides of the precast beam 2 and around the node area 11, and pouring concrete so that the concrete covers the vertical steel bars 12 and stirrups 13 of the node area 11 and the beam steel bars 22 and stirrups 21 of the trough beam.

[0074] Before step 4, the plurality of stirrups 13 are connected to the uppermost vertical reinforcement 12 of the node area 11 by iron wires. After the beam bottom reinforcement 221 is arranged, the connection between the stirrups 13 and the vertical reinforcement 12 is released, and then the stirrups 13 are arranged from top to bottom and tied to the vertical reinforcement 12.

[0075] like Fig. 22 As shown, if in a precast column, only two adjacent faces of its node connection assembly are provided with precast beams, then the ends of its beam reinforcements 22 only extend into the node area 11 and do not pass through the node area 11 .

[0076] 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 support-free assembled beam-column node structure, characterized in that: It comprises a prefabricated column (1) and a prefabricated beam (2); The prefabricated column (1) is a reinforced concrete column structure, and the beam-column joint of the prefabricated column (1) is a node area (11) connected by vertical steel bars (12) and not poured with concrete; The lower part of the node area (11) is enclosed by a plurality of back plates (31) to form a node connection assembly (3); a reinforcement notch (32) is provided in the middle of the upper edge of any back plate (31); at least a portion of the outer wall of the back plate (31) is provided with a U-shaped bracket (33) that fits the edge of the reinforcement notch (32); and a plurality of bolts (34) are connected to the lower inner wall of any back plate (31); and a steel mesh (35) is further provided inside the node connection assembly (3) and above the bolts (34); The precast beam (2) is a trough beam with a groove (23), and beam stirrups (21) extending upward are provided on the beam surface of the trough beam; the end of the precast beam (2) is mounted on a U-shaped bracket (33), and beam reinforcement bars (22) extending into the node area (11) are arranged from top to bottom in the groove (23) of the trough beam; Stirrups (13) are provided from top to bottom at the node area (11) and surround the vertical reinforcement (12), and the beam reinforcement (22) is supported on the stirrups (13); In-situ concrete is poured in the node area (11) and the trough beam of the precast column (1), and the cast-in-situ concrete covers the vertical steel bars (12) and stirrups (13) of the node area (11) and the beam steel bars (22) and stirrups (21) of the trough beam.

2. The support-free assembled beam-column node structure according to claim 1 is characterized in that: The beam reinforcement (22) is divided into a beam bottom reinforcement (221) located at the bottom of the groove (23) of the groove beam and a beam surface reinforcement (222) located at the top surface of the groove (23) of the groove beam.

3. The support-free assembled beam-column node structure according to claim 1 is characterized in that: It also includes a tendon delivery device (4), the tendon delivery device (4) comprising two bearing seats (41), two bearings and a roller (42), the two bearings are mounted on the bearing seats (41), and the two ends of the roller (42) are respectively mounted on the two bearings.

4. The support-free assembled beam-column node structure according to claim 1 is characterized in that: The stirrups (13) and the vertical steel bars (12) are bound and fixed to each other by iron wires.

5. A method for installing a support-free assembled beam-column node structure, characterized in that: A support-free assembled beam-column node structure as described in any one of claims 1 to 4 comprises the following steps: 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 U-shaped bracket (33); Step 3, a plurality of reinforcement delivery devices (4) are sequentially arranged on the longitudinal precast beam (2) according to the extension direction of the precast beam (2), a beam reinforcement (22) is placed on the reinforcement delivery device (4), and the beam reinforcement (22) is pushed into the node area (11) of the precast column (1) or passes through the node area (11) to another longitudinal precast beam (2); the beam reinforcement (22) is lifted by a lifting rope bypassing the beam reinforcement (22), and the reinforcement delivery device (4) is taken out to lower the beam reinforcement (22) to the bottom of the groove (23) to form a beam bottom reinforcement (221); Step 4, repeating the operation of step 3 to complete the arrangement of the bottom reinforcement (221) of the transverse precast beam (2); then completing the arrangement of the stirrups (13) from top to bottom in the node area (11), and at the same time, the stirrups (13) and the bottom reinforcement (221) are tied to each other; Step 5, a plurality of reinforcement delivery devices (4) are sequentially arranged on the longitudinal precast beam (2) according to the extension direction of the precast beam (2), a beam reinforcement (22) is placed on the reinforcement delivery device (4), and the beam reinforcement (22) is pushed into the node area (11) of the precast column (1) or passes through the node area (11) to another longitudinal precast beam (2); the beam reinforcement (22) is lifted by a lifting rope bypassing the beam reinforcement (22), and the reinforcement delivery device (4) is taken out to support the beam reinforcement (22) on the stirrups (13) to form beam surface reinforcement (222); and at the same time, the stirrups (13) and the beam surface reinforcement (222) are tied to each other; Step 6, repeating the operation of step 5 to complete the arrangement of the beam reinforcement (222) of the transverse prefabricated beam (2); Step 7, laying formwork on both sides of the precast beam (2) and around the node area (11), and pouring concrete so that the concrete covers the vertical steel bars (12) and stirrups (13) of the node area (11) and the beam steel bars (22) and stirrups (21) of the trough beam.

6. The installation method of the support-free assembled beam-column node structure according to claim 5 is characterized in that: Before step 4, a plurality of stirrups (13) are connected to the uppermost vertical reinforcement (12) of the node area (11) by means of iron wires. After the beam bottom reinforcement (221) is arranged, the connection between the stirrups (13) and the vertical reinforcement (12) is released, and then the stirrups (13) are arranged from top to bottom and tied to the vertical reinforcement (12).

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