RU193377U1 - The junction of the crossbar with the column of the reinforced concrete frame of the building - Google Patents

Abstract

The utility model relates to ground construction, namely to prefabricated reinforced concrete structures for civil and public buildings. The junction of the crossbar with the column of the reinforced concrete frame of the building includes interconnected embedded parts of the console of the column and the supporting part of the crossbar, made with undercut to accommodate the console of the column. A feature of the proposed site is the implementation of the embedded parts of the supporting part of the crossbar in the form of a corner located in the corner cutting area with anchor rods and transverse plates connecting the corner to the reinforcement cage of the crossbar. The plates are made with through holes for the passage of concrete mixture. In the upper part, the crossbar is connected to the column by means of a patch plate connecting the embedded part on the upper edge of the crossbar with the embedded part of the column. The technical result consists in increasing the bearing capacity of the support part of the crossbar and the reliability of the connection node. 3 s.p. f-ly, 5 ill.

Description

The junction of the crossbar with the column of the reinforced concrete frame of the building

The technical field to which the utility model relates.

The utility model relates to ground construction, namely to prefabricated reinforced concrete structures for civil and public buildings.

State of the art

A butt joint of a reinforced concrete crossbar and a column with consoles is known, including interconnected embedded parts of the console of the column and the supporting part of the crossbar, made with undercut to accommodate the console of the column, and interconnected reinforcement outlets of the column and the upper part of the crossbar (patent SU 1819955, IPC: Е04В1 / 38, published on June 7, 1993).

A known node connecting the crossbar with the column of the bonded reinforced concrete frame of the building, including the supporting portion with undercutting of the crossbar and connected by longitudinal welds of the embedded parts in the supporting part of the crossbar and the console of the column (patent SU 1219755, IPC: E04B1 / 38, publ. 23.03.1986).

In both of the aforementioned analogs, the connection of prefabricated reinforced concrete crossbars and columns is performed as a “hidden console”, which makes it possible to obtain a flat ceiling surface.

The disadvantages of the mentioned structures include the relatively small strength of the support part of the crossbar, the thickness of which is significantly reduced as a result of the so-called "trimming of the crossbar" performed during its molding. In addition, the connection of the reinforcing outlets of the column and the crossbar is often associated with additional labor costs for their alignment and docking.

A known node connecting the crossbars of the T-section with the column of the reinforced concrete frame of the building, including the console of the column, the supporting parts of the crossbars made with trimmings equal to the height of the consoles, interconnected embedded plates of the consoles and the supporting parts of the crossbars (see patent SU 1049630, IPC: Е04В1 / 38 , publ. 10/23/1983). To increase the reliability of the connection node at the level of the crossbars, reinforcing inserts are installed in the girth of the column, fixed to embedded parts on the side faces of the column.

The disadvantages of this solution include a large amount of welding work carried out at the construction site, the need for additional alignment of the side surfaces of the column.

As the closest analogue to the claimed technical solution, a butt joint of precast reinforced concrete beams and columns is adopted, disclosed in patent SU 973744, IPC: Е04В1 / 38, publ. 11/15/1982, which includes welded embedded parts (strips) of the console of the column and the supporting part of the crossbar, made with undercut to accommodate the console of the column, and elements of the connection of the upper part (face) of the crossbar with the column.

This design is characterized by low metal consumption. The disadvantages of the closest analogue include the relatively low strength of the support part of the crossbar, reduced as a result of “trimming”, the possibility of cracks in the corner zone of the trimming at critical loads.

The technical problem solved by the claimed utility model: improving the reliability of the site by increasing the strength and bearing capacity of the support part of the crossbar, eliminating the destruction of the supporting surfaces of the "undercut".

Utility Model Disclosure

The mentioned problem is solved due to the fact that in the junction of the crossbar with the column of the reinforced concrete frame of the building, including interconnected embedded parts of the console of the column and the supporting part of the crossbar, made with undercut to accommodate the console of the column, and the elements of the connection of the upper part of the crossbar with the column, according to the claimed useful models, the embedded part of the support part of the crossbar is made in the form of a corner located in the corner cutting area with anchor rods and transverse plates connecting the corner with the reinforcing car ace pins, with through holes made for the passage of a concrete mixture.

A significant difference between the proposed technical solution and the closest and other known analogues is the design of the embedded part of the support part of the crossbar, which, unlike traditional plates, has a complex spatial shape formed by a corner and steel plates transverse to it, which are located essentially perpendicular to both shelves of the corner and rigidly connected to them and to the reinforcing frame of the crossbar.

This design of the embedded part contributes to the high spatial rigidity of the assembly, provides uniform load distribution in the volume of the support cantilever part of the crossbar, and prevents the appearance of inclined cracks from transverse forces.

Due to the presence of through holes in the plates for the passage of concrete mixture, the separation of concrete is excluded, reliable joint work of concrete and metal is ensured.

Shelves of the corner lying in the cutting planes of the crossbar contribute to the hardening of the latter, ensure the safety of the shape of the cutting, and prevent the appearance of cracks and other defects in the corner zone of the cutting.

All this contributes to the high bearing capacity of the support part of the crossbar and the reliability of the connection node.

Cross plates are made with corner cutouts for placement of a corner and are connected to it by welding.

The plates are spaced relative to each other along the length of the corner, while the anchor rods are fixed to the corner between the plates.

The elements for connecting the upper part of the crossbar to the column are preferably made in the form of a steel plate welded by flank seams to the embedded part on the upper edge of the crossbar and butt to the embedded part of the column.

Brief Description of the Drawings

The essence of the proposed technical solution is illustrated by the following examples of specific implementation and drawings, which depict:

figure 1 is a fragment of a precast concrete frame of a building;

figure 2 - a fragment of figure 1 is enlarged;

in FIG. 3 - embedded part, in FIG. 4 - view A from figure 3,

in FIG. 5 is a view B of FIG. 3.

Utility Model Implementation

The prefabricated reinforced concrete frame of the building includes (see Fig. 1) columns 1 with consoles 2 at the level of overlap and bolts 3 mounted on them, made with end undercuts, essentially equal to the height of the consoles 2 columns 1 placed in them.

The junction of the crossbar 3 with the column 1 includes (see figure 2) the embedded part 4 of the console 2 of the column 1 and the embedded part 5 of the supporting part of the crossbar 3, interconnected by longitudinal welds on both sides.

In the upper part, the crossbar 3 is connected to the column 1 by means of a patch plate 6, the so-called "fish", welded by flank seams to the embedded part 7 on the upper edge of the crossbar 3 and butt to butt to the embedded part 8 of the column 1.

The above example of the connection of the upper part of the crossbar with the column is preferred, but does not exclude other designs.

The embedded part 5 of the supporting part of the crossbar 3 (see Fig. 3) is made in the form of a corner 9 with anchor rods 10 and transverse plates 11, each of which is made with an angular cutout 12 in the lower part to accommodate the corner 9 and through holes 13 for passing concrete mixtures.

The plates 11 are spaced relative to each other along the length of the corner 9, while the anchor rods 10 are fixed to the corner 9 between the plates 11.

The manufacturing of the embedded part 5 includes the preparation of components: corner 9, plates 11 and anchor rods 10, their assembly and welding using a jig that provides a fixed position of the above-mentioned elements during assembly and welding.

Ready embedded parts 5 are installed in the supporting parts of the assembled frame of the crossbar 3 in the areas corresponding to the corner cuttings (usually performed on both ends of the crossbar to be installed on the console of adjacent columns of the frame) and fix them from displacement.

The spatial frame of the crossbar is assembled. Set embedded parts 7. Connect the components of the frame by welding. The plates 11 of the embedded parts 5 and the embedded parts 7 are welded to the reinforcing rods of the frame (not shown).

The finished metal frame, placed in the form, is poured with concrete mixture. The presence in the plates 11 through holes 13 for the passage of concrete mix provides a reliable connection of metal and concrete.

The crossbar is calculated according to the scheme of a single-span beam of T-section with conditionally articulated supports under the action of a uniformly distributed vertical load.

The forces in the lower part of the crossbar 3 are transmitted through the embedded parts 5 and 4 to the console 2 of the column 1, while the design of the embedded part 5 ensures uniform load distribution in the volume of the support part of the crossbar, eliminates the occurrence of cracks and the destruction of the supporting surfaces, ensures long-term reliable operation of the assembly.

The efforts in the upper part of the crossbar 3 to the column 1 are transmitted through the patch plate 6. The use of "fish" allows you to increase the rigidity of the crossbar, compensating for excessive deflection under load. An additional moment is formed, which is transmitted from the invoice plate 6 through the embedded part 7 to the reinforcement cage of the crossbar 3.

Direct transmission of forces from the load on the crossbar 3 in its lower and upper parts is carried out due to metal products. The transfer of forces from the crossbar 3 to the column 1 through concrete is absent.

The given example of a specific implementation is preferred and does not limit the possibility of using a utility model that is obvious to specialists practicing in this field.

Claims (4)

1. The node connecting the crossbar with the column of the reinforced concrete frame of the building, including interconnected embedded parts of the console of the column and the supporting part of the crossbar, made with undercut to accommodate the console of the column, and the elements of the connection of the upper part of the crossbar with the column, characterized in that the embedded part of the supporting part of the crossbar made in the form of a corner placed in the corner zone of trimming with anchor rods and transverse plates connecting the corner with the reinforcement cage of the crossbar, made with through holes for passage eniya concrete mix. 2. The connection node according to claim 1, characterized in that the transverse plates are made with corner cutouts to accommodate the corner and are connected to it by welding. 3. The connection node according to claim 1, characterized in that the transverse plates are spaced relative to each other along the length of the corner, while the anchor rods are fixed to the corner between the plates. 4. The connection node according to claim 1, characterized in that the elements of the connection of the upper part of the crossbar with the column are made in the form of a patch plate connecting the embedded part on the upper face of the crossbar with the embedded part of the column.

Images