CN219011479U - Assembled frame connecting node and assembled frame - Google Patents

Abstract

The utility model discloses an assembled frame connection node and an assembled frame in the technical field of construction. The assembled frame connection node includes a node core area and beam-column embedded parts, and the beam-column embedded parts include end plates, The node core area includes an upper flange plate, a lower flange plate, a medial diaphragm connected between them, and a connecting plate arranged on the medial diaphragm. The beam-column embedded parts are used to be embedded in prefabricated beams and prefabricated columns, and the node core area is used to connect each end plate so that the prefabricated beams and prefabricated columns are assembled into a prefabricated frame. In this application, prefabricated beams and columns are provided with beam-column embedded parts, and the beam-column embedded parts are connected by using the core area of the node to form a prefabricated frame. The support and node areas do not require wet work, which is conducive to reducing construction costs, and the construction of the upper frame does not affect the construction of the lower concrete floor slab, which is conducive to speeding up the construction progress.

Description

Prefabricated frame connection node and prefabricated frame

technical field

The utility model relates to the technical field of buildings, in particular to an assembled frame connection node and an assembled frame.

Background technique

The prefabricated concrete structure is a concrete structure that is assembled and connected with prefabricated components as the main force-bearing components. It has the advantages of high construction efficiency and more in line with the requirements of green construction. According to the requirements of the "Technical Specifications for Prefabricated Concrete Structures" (JGJ 1-2014), the floor slab of the prefabricated concrete frame structure should be provided with a cast-in-place layer to ensure the integrity of the structure. In order to meet the requirements of the code, the beams of the prefabricated concrete frame structure usually need to be divided into prefabricated parts and cast-in-place parts for two constructions. Since the steel bars of the slabs and beams need to be anchored in the joints, the joints need to be cast in-situ, and the prefabricated beams, columns and joints The connection requires the setting of a grout sleeve. This node connection method requires a lot of temporary supports, a large amount of wet work on site, a long construction period, and the quality of the concrete inside the grouting sleeve is difficult to detect. Under the requirements of the code, how to further reduce the wet work on site, optimize the connection structure and assembly method of nodes, and speed up the construction progress are problems that need to be solved urgently.

Utility model content

In order to overcome the above-mentioned deficiencies existing in the existing prefabricated frame, the technical problem to be solved by the utility model is: to provide a prefabricated frame connection node, prefabricated frame and assembly method with high construction efficiency.

The technical scheme that the utility model solves its technical problem adopts is:

The prefabricated frame connection node includes the core area of the node and the beam-column embedded parts. The scissor key fitting groove is located in the center of the end plate, and a first through hole is provided around the end plate, and the end connected to the end plate is provided with a threaded hole, and the threaded hole is aligned with the first through hole, and the core area of the node is It includes the upper flange plate, the lower flange plate and the mediastinal plate connected between them, as well as the connection plate arranged on the mediastinal plate, the middle part of the upper flange plate, the lower flange plate and the connection plate is provided with The shear key matching the shear key adaptation groove is provided with a second through hole matching the first through hole on the periphery.

Further, the node core area includes the bottom node of the column, the node of the middle layer and the node of the top layer of the column, the connection plate is not arranged on the node of the column bottom of the bottom layer, and the upper flange of the node of the top layer of the column is not provided with Shear key and second through hole.

Further, the height of the longitudinal diaphragms of the middle layer node and the top column top node is 200-500mm, and a transverse diaphragm is provided in the middle of the longitudinal diaphragms.

Further, the connecting plate and the medial septum are connected through H-shaped steel, and the length of the H-shaped steel is 200-500mm.

Further, the upper and lower flanges of the H-shaped steel are provided with semicircular holes.

Further, the end of the peg away from the end plate is provided with a hemispherical top cap, and the outer diameter of the hemispherical top cap is larger than the outer diameter of the peg.

The prefabricated frame includes reinforced concrete prefabricated beams and prefabricated columns, and also includes prefabricated frame connection nodes, wherein the end plates of the beam-column embedded parts are pre-embedded at the ends of the prefabricated beams and prefabricated columns, and the prefabricated beams and prefabricated columns The reinforced cage is welded to the end plate, and the prefabricated beams and prefabricated columns are connected through the joint core area to form a prefabricated frame.

Further, the reinforcement cage of the prefabricated beam includes bottom longitudinal reinforcement and stirrups, the bottom longitudinal reinforcement is welded to the bottom of the end plate, and the middle part of the end plate is provided with pre-embedded reinforcement, and the top of the stirrup exceeds the concrete of the prefabricated beam On the upper surface, its excess height is the thickness of the upper building and roof panel minus 15mm. Top longitudinal reinforcement is interspersed on the top of the stirrup. The end of the top longitudinal reinforcement is welded to the core area of the node. The cast layer covers the top of the stirrups and the top longitudinal bars.

Further, for prefabricated beams that need to be installed with floor slabs, the cast-in-place layer on the upper surface of the prefabricated beams is integrally cast with the cast-in-place layer of the floor slab; The ribs are set through the top of the core area of the node. If there is only a beam on one side of the core area of the node, the top longitudinal ribs are bent downward and welded to the upper flange plate, and the upper flange plate is welded with U-shaped stirrups to the top longitudinal rib. Muscles are constrained.

The beneficial effects of the utility model are: by setting beam-column embedded parts on the prefabricated beams and columns, and using the node core area to connect the beam-column embedded parts to form an assembled frame, the connection parts are installed with bolts, and the structure is safe and reliable , the construction process does not require temporary support, and the node area does not require wet work, which is conducive to reducing construction costs, and the construction of the upper frame does not affect the construction of the lower concrete floor slab, which is conducive to speeding up the construction progress.

Description of drawings

Fig. 1 is a schematic diagram of the joint structure of the assembled frame of the present invention.

Fig. 2 is a schematic diagram of the structure of the bottom column bottom node of the utility model.

Fig. 3 is a schematic diagram of the structure of the top column top node of the utility model.

Fig. 4 is a structural schematic diagram of the peg of the present invention.

Fig. 5 is a structural schematic diagram of a beam-column reinforcement cage of the present invention.

Fig. 6 is a schematic diagram of the beam-column structure of the utility model.

Fig. 7 is a schematic diagram of the prefabricated beam pre-embedded steel structure of the utility model.

Fig. 8 is a schematic diagram of the connection structure between the middle layer node and the prefabricated beam reinforcement cage of the utility model.

Fig. 9 is a schematic diagram of the connection structure between the top column top node of the utility model and the prefabricated beam reinforcement cage.

Fig. 10 is a schematic diagram of the installation structure of the frame and the floor of the present invention.

Marked in the figure, 1-node core area, 2-beam-column embedded parts, 3-prefabricated beam, 4-prefabricated column, 5-floor prefabricated layer, 6-floor cast-in-place layer, 11-upper flange plate, 12 - lower flange plate, 13- longitudinal diaphragm, 14- connecting plate, 15- shear key, 16- second through hole, 17- transverse diaphragm, 18- H-shaped steel, 19- semicircular hole, 21- end plate, 22-Peg, 23-Shear key adaptation groove, 24-First through hole, 25-Threaded hole, 26-Hemispherical top cap, 27-Embedded reinforcement, 31-Bottom longitudinal reinforcement, 32-Stirrup, 33-top longitudinal reinforcement, 34-U-shaped stirrup.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1-4, the assembled frame connection node of the present invention includes a node core area 1 and a beam-column embedded part 2. The beam-column embedded part 2 includes an end plate 21, and the embedded The peg 22 and the shear key adaptation groove 23 provided on one side, the shear key adaptation groove 23 is located at the center of the end plate 21, and the first through hole 24 is provided around the end plate 21, the peg 22 and the end plate One end connected to the plate 21 is provided with a threaded hole 25, and the threaded hole 25 is aligned with the first through hole 24, and the node core area 1 includes an upper flange plate 11, a lower flange plate 12 and a mediastinum connected between the two plate 13, and the connecting plate 14 arranged on the longitudinal diaphragm 13, the middle part of the upper flange plate 11, the lower flange plate 12 and the connecting plate 14 is provided with a shear key matching the shear key adapting groove 23 15 , the second through hole 16 matching the first through hole 24 is provided on the periphery.

The beam-column embedded part 2 is used to be embedded in the prefabricated beam 3 and the prefabricated column 4, wherein the end plate 21 is located at the installation end of the prefabricated beam 3 and the prefabricated column 4, and the upper flange plate 11 on the node core area 1, The lower flange plate 12 and the connecting plate 14 are used to connect each end plate 21, so that the prefabricated beam 3 and the prefabricated column 4 are assembled into a prefabricated frame. In the connection process, firstly, the shear key adaptation groove 23 on the end plate 21 is mated with the shear key 15 on the upper flange plate 11, the lower flange plate 12 and the connecting plate 14, and at the same time the first through hole 24 Align with the second through hole 16 , and then fasten through the second through hole 16 , the first through hole 24 and the threaded hole 25 on the peg 22 by bolts in sequence.

For the node core area 1, according to the usage and installation location, it can be divided into the bottom column node, the middle layer node and the top column top node. The bottom column bottom node is used to connect the prefabricated column and the foundation, as shown in Figure 2 , because the beam is not connected, there is no need to set the connecting plate 14, and the height is too high; the middle layer node is as shown in Figure 1, and the connecting plate 14 needs to be set, and the height is relatively high; the top column top node, as shown in Figure 3 As shown, because there is no prefabricated column at the top, the shear key 15 and the second through hole 16 are not provided on the upper flange plate 11 .

For the middle layer node and the top column top node, because the size of the beam and the floor needs to be considered, the height of the medial diaphragm 13 of the middle layer node and the top column top node is 200-500mm. The middle part of 13 is provided with diaphragm 17 to transmit the power of the upper flange plate of beam.

Further, for the convenience of installation, the connecting plate 14 is connected with the mediastinal plate 13 through H-shaped steel 18, so that the connecting plate 14 protrudes from the node core area 1. Considering the structural strength comprehensively, the length of the H-shaped steel 18 is 200-500mm , can leave enough assembly space. The upper and lower flanges of the H-shaped steel 18 are also provided with semicircular holes 19 to form plastic hinges and dog-bone connections to ensure the design of strong columns and weak beams.

For the stud 22, in order to facilitate the processing of the threaded hole 25, a threaded sleeve structure can be used, but in order to prevent concrete from entering the threaded hole 25 during the manufacture of prefabricated beams and columns, a hemisphere can be set at the end of the stud 22 away from the end plate 21 Shaped top cap 26, as shown in Figure 4, the outer diameter of hemispherical top cap 26 is about 5mm greater than stud 22 outer diameters, can prevent concrete from entering threaded hole 25, can prevent end plate 21 from loosening simultaneously from prefabricated concrete beam, column.

The prefabricated frame made by using the above-mentioned prefabricated frame connection node includes reinforced concrete prefabricated beam 3 and prefabricated column 4, and also includes a prefabricated frame connection node, wherein the end plate 21 of the beam-column embedded part 2 is pre-embedded in the prefabricated beam 3 and the end of the prefabricated column 4, and the reinforcement cages of the prefabricated beam 3 and the prefabricated column 4 are welded to the end plate 21. The specific structure is shown in Fig. 5 and Fig. 6. The connections form a fabricated frame. By adopting the appropriate base node, middle layer node and top layer column top node, a straight, L-shaped, T-shaped or cross-shaped frame structure can be realized. When designing the prefabricated frame connection nodes according to the prefabricated beams and columns, the edge of the end plate 21 should be 10-15mm smaller than the edge of the prefabricated beams and columns, so as to leave gaps for subsequent filling and painting, and avoid steel structure exposure.

For prefabricated beam 3, considering that it needs to be assembled and connected with the floor, and at the same time meet the requirements of the "Technical Specifications for Prefabricated Concrete Structures", it is necessary to set a cast-in-place layer on the prefabricated beam to ensure the integrity of the structure. Therefore, the preferred solution is that the reinforcement cage of the prefabricated beam 3 includes bottom longitudinal bars 31 and stirrup bars 32. As shown in FIG. Embedded reinforcement 27, the end of pre-embedded reinforcement 27 can be bent, so that it is stably connected with concrete, as shown in Figure 8, the top of described stirrup 32 exceeds the concrete upper surface of prefabricated beam 3, and its exceeding height is upper building, The thickness of the roof panel is minus 15mm, and the top longitudinal reinforcement 33 is interspersed on the top of the stirrup 32, and the end of the top longitudinal reinforcement 33 is welded to the node core area 1, and the upper surface of the prefabricated beam 3 is provided with a cast-in-place layer to tie the stirrup 32 tops and top longitudinal ribs 33 cover. The prefabricated beam 3 and the prefabricated column 4 can be poured and connected together through the cast-in-place layer, thereby improving the integrity of the structure.

As shown in Figure 10, for the prefabricated beam 3 that needs to be installed with the floor, the floor is divided into a prefabricated floor 5 and a cast-in-place floor 6, the prefabricated floor 5 is flush with the concrete upper surface of the prefabricated beam 3, and the upper surface of the prefabricated beam 3 The cast-in-place layer can be directly cast together with the cast-in-place layer 6 of the floor slab, so as to meet the requirements of the "Technical Specifications for Prefabricated Concrete Structures" that the floor slab needs to be provided with a cast-in-place layer; as shown in Figure 9, for the prefabricated beam 3 on the top floor, if If there are beams on both sides of the node core area 1, the top longitudinal ribs 33 are set through the top of the node core area 1. If only one side of the node core area 1 has beams, the top longitudinal ribs 33 are bent downward and welded to the upper flange plate 11 , U-shaped stirrups 34 are welded on the upper flange plate 11 to constrain the top longitudinal ribs 33 .

An assembly method for a prefabricated frame includes the following steps:

a. According to the frame structure and beam and column dimensions, fabricate the assembled frame connection nodes, as well as the beam and column reinforcement cages, and weld the beam and column embedded parts with the beam and column reinforcement cages;

b. Pouring concrete to make prefabricated beams and columns, wherein the prefabricated beam does not contain top longitudinal reinforcement, and the top of the stirrup exceeds the concrete upper surface of the prefabricated beam, and the excess height is the thickness of the upper building and roof slab minus 15mm;

c. Use the core area of the node and assemble the beams and columns according to the frame structure, and prefabricate the frame in shape;

d. Connect the top longitudinal reinforcement at the top of the stirrup of the prefabricated beam, and weld the top longitudinal reinforcement to the medial diaphragm in the core area of the node;

e. Install the prefabricated floor slab on the prefabricated beam, then bind the negative moment reinforcement of the cast-in-place layer, and finally pour the cast-in-place floor layer on the prefabricated beam and the prefabricated floor slab;

f. Follow steps c to e to install layer by layer from bottom to top;

g. After the installation is completed, use anti-rust paint for anti-rust treatment on the exposed steel in the node area, fill the gaps between the joints with dry hard aerated concrete or rock wool, and paint with cement mortar.

In this application, prefabricated beams and columns are provided with beam-column embedded parts, and the beam-column embedded parts are connected by using the core area of the node to form a prefabricated frame. The supporting and node areas do not require wet work, which is conducive to reducing construction costs, and the construction of the upper frame does not affect the construction of the lower concrete floor, which is conducive to speeding up the construction progress and has a good application prospect.

Claims (9)

1. The assembled frame connection node is characterized in that it includes a node core area (1) and a beam-column embedded part (2), and the beam-column embedded part (2) includes an end plate (21), an end plate ( 21) Pre-embed the pegs (22) and the shear key adaptation groove (23) provided on one side, the shear key adaptation groove (23) is located at the center of the end plate (21), and the periphery of the end plate (21) is provided with There is a first through hole (24), and one end of the peg (22) connected to the end plate (21) is provided with a threaded hole (25), and the threaded hole (25) is aligned with the first through hole (24), so The node core area (1) includes an upper flange plate (11), a lower flange plate (12) and a longitudinal diaphragm (13) connected between them, and a connecting plate ( 14), the middle part of the upper flange plate (11), the lower flange plate (12) and the connecting plate (14) is provided with a shear key (15) matching the shear key adaptation groove (23), A second through hole (16) matched with the first through hole (24) is arranged on the periphery. 2. The prefabricated frame connection node as claimed in claim 1, characterized in that: the node core area (1) includes the bottom column node, the middle layer node and the top layer column top node, and there is no A connecting plate (14) is provided, and no shear key (15) and second through hole (16) are provided on the upper flange plate (11) of the top column top node. 3. The assembled frame connection node as claimed in claim 2, characterized in that: the height of the longitudinal diaphragm (13) of the middle layer node and the top floor column top node is 200-500mm, and the height of the longitudinal diaphragm (13) The middle part is provided with a transverse partition (17). 4. The assembled frame connection node as claimed in claim 1, characterized in that: the connecting plate (14) is connected to the longitudinal diaphragm (13) through H-shaped steel (18), and the length of the H-shaped steel (18) is 200-500mm. 5. The assembled frame connection node according to claim 4, characterized in that: the upper and lower flanges of the H-shaped steel (18) are provided with semicircular holes (19). 6. The assembled frame connection node according to claim 1, characterized in that: the end of the peg (22) away from the end plate (21) is provided with a hemispherical top cap (26), and the hemispherical top cap (26) ) is about 5mm greater than the outer diameter of the peg (22) outer diameter. 7. Prefabricated frame, comprising prefabricated beams (3) and prefabricated columns (4) of reinforced concrete, characterized in that: it also includes a prefabricated frame connection node as claimed in any one of claims 1-6, wherein beam, The end plate (21) of the column embedded part (2) is embedded in the end of the prefabricated beam (3) and the prefabricated column (4), and the reinforcement cage of the prefabricated beam (3) and the prefabricated column (4) and the end plate ( 21) Welding, the prefabricated beams (3) and prefabricated columns (4) are connected through the node core area (1) to form a prefabricated frame. 8. The fabricated frame according to claim 7, characterized in that: the reinforcement cage of the prefabricated beam (3) comprises bottom longitudinal reinforcement (31) and stirrup (32), and the bottom longitudinal reinforcement (31) and The bottom of the end plate (21) is welded, and the middle part of the end plate (21) is provided with a pre-embedded reinforcement (27) to be welded with the end plate (21), and the top of the stirrup (32) exceeds the concrete upper surface of the prefabricated beam (3), The excess height is the thickness of the upper floor and the roof panel minus 15 mm, and the top longitudinal reinforcement (33) is interspersed on the top of the stirrup (32), and the end of the top longitudinal reinforcement (33) is welded to the node core area (1), so The upper surface of the prefabricated beam (3) is provided with a cast-in-place layer to cover the top of the stirrup (32) and the top longitudinal reinforcement (33). 9. The prefabricated frame according to claim 8, characterized in that: for the prefabricated beam (3) that needs to be installed with the floor slab, the cast-in-place layer on the upper surface of the prefabricated beam (3) and the cast-in-place layer of the floor slab are integrally cast ; For the prefabricated beam (3) on the top floor, if there are beams on both sides of the joint core area (1), then the top longitudinal reinforcement (33) is set through the top of the joint core area (1), if only one side of the joint core area (1) has beam, the top longitudinal rib (33) is bent downward and welded on the upper flange plate (11), and the upper flange plate (11) is welded with a U-shaped stirrup (34) to the top longitudinal rib (33) to constrain.

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