Bolt-welding mixed connection full-prefabricated assembly type RC frame beam and column connection node

Abstract

The utility model provides a bolting-welding mixed connection full-prefabricated assembly type RC frame beam and column connection node, which relates to the technical field of buildings and comprises a node, a beam end is fixedly arranged on the side wall, connected with a beam, of the node, and the beam end is of a boot-shaped steel sleeve structure; pre-embedded bolts which are uniformly spaced are pre-embedded in the beam ends, and the threaded ends of the pre-embedded bolts face outwards; a cover plate is buckled on the outer side walls of the two beam ends in butt joint, through holes allowing the embedded bolts to penetrate through are formed in the cover plate, and nuts are connected to the tail ends of the embedded bolts in a screwed mode to fix the cover plate to the side walls of the beam ends. Through a prefabricated connecting system formed by the boot-shaped steel sleeve at the end of the beam and the rectangular steel sleeve at the end of the column and in combination with adjustable mechanical connection of the embedded bolt and the cover plate, rapid positioning and temporary fixing of the component are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a building technical field especially relates to a bolt-welding mixed connection full prefabricated assembly type RC frame beam, column connecting joint. BACKGROUND

[0002] Under the background of rapid development of prefabricated concrete structure, beam-column joint connecting technology is always the core problem restricting industrialized construction efficiency and overall performance of structure. Although traditional cast-in-situ joint has good integrity, it has disadvantages such as complex formwork on site, large amount of wet operation, long construction period and the like, and is difficult to adapt to the demand of building industrialization. And the existing full prefabricated assembly type joint mostly adopts single connecting mode: such as pure bolt connecting joint needs to rely on high-precision embedded part positioning, is sensitive to component hoisting deviation in construction, and often needs to be adjusted repeatedly, and although full-welding joint can guarantee rigidity, the amount of on-site welding operation is large, the technical level of workers is required to be high, and welding heat influence easily leads to damage of concrete in joint area. In addition, conventional assembly type joint often needs to add dense stirrups in joint area to meet the requirement of anti-seismic, which leads to crowded steel bar arrangement, and the compactness of concrete pouring is difficult to control, and thus the energy dissipation capacity of joint area is weakened. SUMMARY

[0003] The utility model relates to a bolt-welding mixed connection full prefabricated assembly type RC frame beam, column connecting joint, which forms a prefabricated connecting system through the boot-shaped steel sleeve of the beam end and the rectangular steel sleeve pipe of the column end, and realizes rapid positioning and temporary fixing of components by combining the adjustable mechanical connection of embedded embedded bolt and cover plate.

[0004] The utility model discloses a bolt-welding mixed connection full prefabricated assembly type RC frame beam, column connecting joint, and specifically includes: a joint, a beam end is fixedly arranged on the side wall of the joint and connected with the beam, and the beam end is a boot-shaped steel sleeve structure; evenly spaced embedded bolts are embedded in the beam end, and the threaded end of the embedded bolt faces outward; cover plates are buckled on the outer side walls of the two beam ends opposite to each other, the cover plates are provided with through holes for the embedded bolts to pass through, and nuts are screwed on the ends of the embedded bolts to fix the cover plates on the side walls of the beam ends.

[0005] Optionally, one end of the joint connected with the column is provided with a column end, the column end is a rectangular steel sleeve pipe, evenly spaced embedded bolts are also arranged on the four side walls of the column end, and cover plates are also buckled between the outer side walls of the column end, nuts are screwed on the ends of the embedded bolts on the column end to fix the cover plates on the side walls of the column end.

[0006] Optionally, all the joint interface covering joint areas of the adjacent edge seams of the cover plates are welded.

[0007] The utility model provides a kind of bolt-welding hybrid connection full prefabricated assembly type RC frame beam, column connection node, with following beneficial effects:

[0008] The bolt-welding hybrid connection full prefabricated assembly type RC frame beam column node provided by the utility model, compared with traditional assembly type connection technology, shows significant advantages in construction efficiency, node performance and seismic capacity. First, the prefabricated connection system formed by the boot-shaped steel sleeve of the beam end and the rectangular steel sleeve pipe of the column end, combined with the adjustable mechanical connection of embedded bolt and cover plate, realizes the rapid positioning and temporary fixing of components. Compared with the traditional full-welded node, this design greatly reduces the requirement for on-site construction precision, and the preliminary assembly can be completed without complex positioning tooling during construction, effectively shortening the hoisting adjustment time, especially suitable for large-scale prefabricated component assembly of high-rise buildings.

[0009] Secondly, the synergistic effect of bolting and welding breaks through the performance limitations of single connection mode: the mechanical connection system composed of high-strength embedded bolts can efficiently transfer the bending moment and shear force of the node, and the continuous welding at the edge joint of the cover plate (covering all the joint areas) forms a closed steel sleeve structure, which not only eliminates the influence of the bolting gap on the interface shear performance, but also forms a kind of integral steel structure in the node area, with an increase of about 40%-60% in bending stiffness compared with traditional pure embedded bolt nodes, which can significantly inhibit the rotational deformation of the node under strong earthquake action.

[0010] In addition, the three-dimensional constraint of the core area concrete by the special-shaped steel sleeve of the boot-shaped structure of the beam end and the rectangular sleeve pipe of the column end can delay the cracking process of the concrete, increase the energy dissipation capacity of the node by about 25% compared with conventional cast-in-place nodes, and avoid the concrete pouring quality problems caused by the excessive density of traditional hoop reinforcement in the node area. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments will be briefly introduced below.

[0012] The drawings described below only relate to some embodiments of the utility model, and are not a limitation on the utility model.

[0013] In the drawings:

[0014] Figure 1 The upper axial view structural schematic diagram of the node part of the utility model is shown;

[0015] Figure 2 The lower axial view structural schematic diagram of the node part of the utility model is shown;

[0016] Figure 3 The axial view structural schematic diagram of the node and beam connection state of the utility model is shown;

[0017] Figure 4 The node and the beam are fully welded in the state shown in the structure schematic diagram of the node and the beam fully welded state of the utility model;

[0018] Figure 5 The node and the column are connected in the state shown in the axial structure schematic diagram of the node and the column connection state of the utility model;

[0019] Figure 6 The node and the column are fully welded in the state shown in the structure schematic diagram of the node and the column fully welded state of the utility model.

[0020] List of reference signs

[0021] 1, node; 2, beam; 3, column; 4, beam end; 5, column end; 6, embedded bolt; 7, cover plate; 8, nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely below in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] Embodiment one: please refer to Figures 1 to 6 :

[0024] The utility model proposes a kind of bolt-welding hybrid connection full prefabricated assembly type RC frame beam, column connecting node, comprising: node 1, the side wall of node 1 and beam 2 are connected with the fixed beam end 4 of being equipped with, beam end 4 is boot-shaped steel sleeve structure;Uniformly spaced embedded bolt 6 is embedded in beam end 4, the threaded end of embedded bolt 6 faces outward;The outer side wall of the two beam ends 4 of opposite joint is buckled with cover plate 7, cover plate 7 is provided with through hole for embedded bolt 6, the end of embedded bolt 6 is screwed with nut 8 and cover plate 7 is fixed on the side wall of beam end 4.

[0025] Embodiment two, on the basis of embodiment one, as shown in Figure 5 And Figure 6 The end of node 1 and column 3 is equipped with column end 5, and column end 5 is rectangular steel sleeve pipe, and uniformly spaced embedded bolt 6 is also installed on the four side walls of column end 5, and cover plate 7 is also buckled between the outer side walls of column end 5, and the end of embedded bolt 6 on column end 5 is screwed with nut 8 and cover plate 7 is fixed on the side wall of column end 5.

[0026] Among them, the adjacent edge joint of cover plate 7 is connected by joint welding to cover all joint areas of interface.

[0027] The working principle of the embodiment is:

[0028] When the node 1 is connected with the beam 2, the embedded bolts 6 embedded in the steel shoe structure beam end head 4 are positioned and connected with the through holes of the cover plate 7 through the exposed threaded ends, and the two beam end heads 4 are clamped and fixed by the pre-tightening force of the nuts 8. The column end head 5 adopts a rectangular steel sleeve structure, and when the evenly distributed embedded bolts 6 on the four side walls are connected with the column 3, the bolts are also connected by the cover plate 7 and the nut 8 to form a rigid connection, and the bolt connection system transmits the bending moment and shear force of the node through the mechanical engagement of the high-strength embedded bolts 6, so as to ensure the rapid positioning and temporary fixing during the construction stage.

[0029] The key to improving the integrity of the node 1 lies in the joint welding process of the cover plate 7. After the connection of the embedded bolts 6 is completed, continuous welding is carried out at the adjacent joint of the cover plate 7, and the welding seam covers the joint area of the connection interface (such as the joint seam of the beam end head 4 and the column end head 5). This welding process realizes the complete sealing of the connection interface, forming a secondary stress system: on the one hand, the welding metal makes up for the possible local gap of the bolt connection, and enhances the shear capacity of the interface; on the other hand, the continuous steel sleeve structure formed by welding makes the node area form a whole steel structure, which significantly improves the bending stiffness and seismic performance of the node 1.

[0030] The structure system fully utilizes the synergistic advantages of bolt connection and welding, and the adjustable connection system composed of the embedded bolts 6 and the cover plate 7 meets the rapid assembly requirements of the prefabricated component and reduces the positioning accuracy requirements of the site construction; the subsequent welding process realizes the leap of the node stiffness through metallurgical bonding, and forms multiple seismic defense lines. The boot-shaped structure of the beam end head 4 and the rectangular sleeve design of the column end head 5 can effectively delay the cracking of the concrete and improve the energy dissipation capacity of the node area by restraining the core area concrete through the special-shaped steel sleeve.

[0031] In this paper, the following points need attention:

[0032] 1. The embodiment of the utility model only relates to the structure involved in the embodiment of the utility model, and other structures can refer to the general design.

[0033] 2. In the case of no conflict, the embodiments of the utility model and the features in the embodiments can be combined to obtain new embodiments.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A bolt-welded hybrid prefabricated RC frame beam-column connection node, characterized in that, include: Node (1), the side wall of which the node (1) is connected to the beam (2) is fixedly provided with a beam end (4), the beam end (4) is a boot-shaped steel sleeve structure; the beam end (4) is pre-embedded with evenly spaced pre-embedded bolts (6), the threaded end of the pre-embedded bolts (6) faces outward; the outer side walls of the two beam ends (4) that are connected to each other are fitted with cover plates (7), the cover plates (7) are provided with through holes for the pre-embedded bolts (6) to pass through, and the ends of the pre-embedded bolts (6) are screwed with nuts (8) to fix the cover plates (7) to the side wall of the beam end (4).

2. The bolt-welded hybrid prefabricated RC frame beam-column connection node according to claim 1, characterized in that, The node (1) is connected to the column (3) at one end and is provided with a column end (5). The column end (5) is a rectangular steel sleeve. The four side walls of the column end (5) are also equipped with evenly spaced pre-embedded bolts (6). The outer side walls of the column end (5) are also fastened with cover plates (7). The pre-embedded bolts (6) on the column end (5) are screwed with nuts (8) to fix the cover plates (7) to the side walls of the column end (5).

3. The bolt-weld hybrid prefabricated RC frame beam-column connection node according to claim 1, characterized in that, The cover plate (7) covers the entire seam area of ​​the connection interface by welding the adjacent seams.

Images