RU85174U1 - COLUMN ASSEMBLY ASSEMBLY - Google Patents

Abstract

The coupling of the crossbar with the column of the reinforced concrete frame of the building, including the prefabricated column with a hole at the level of the floors, prefabricated crossbars with reinforcement outlets at the ends and on the upper face, with vertical outlets located along the length of the crossbar with a fixed pitch, and dowels in the form of horizontal recesses of a triangular section, and prefabricated floor slabs with a gap between their ends, monolithic at the same time with a hole in the column, reinforced outlets from the prefabricated crossbar and supporting reinforcement released into it minutes, laid in a monolithic part beams, wherein the aperture in the reinforced concrete column at the overlap formed height equal to the total height of the beam and the precast monolithic part and end surfaces of precast slabs are inclined to the plane of the panel along its entire height.

Description

The utility model relates to the field of construction and can be used to interface bolts with columns of reinforced concrete frames of buildings and structures.

A butt joint is known (USSR Author's Certificate No. 670699, 02.28.78, CL Е04В 1/38, Е04С 3/34), which is the conjugation of a column with a crossbar made by an industrial method, including concrete filling, rigidly interconnected upper and lower reinforcing bars issues, diagonal braces and overlays of the lower issues.

The disadvantages of this connection model are:

- the use of known compounds is possible only in prefabricated frames;

- prefabricated elements used in the joint require high accuracy of installation of structures, which leads to an increase in labor costs;

- the metal consumption of the joint increases due to the large number of embedded parts;

- the increase in energy consumption when connecting the joint is associated with a large number of welded work.

A butt joint is known (USSR Author's Certificate No. 1325142, 07.03.86, class Е04В 1/38, Е04В 1/20) of a crossbar with a column, including a beveled support face of the hidden console of the column, embedded parts of the support face of the console and the support part of the crossbar, concrete joint cavity.

The described compound has the following disadvantages:

- it is applicable only in prefabricated frames;

- design features of the support console increase the complexity of manufacturing the formwork of prefabricated columns;

- the use of embedded parts of the console of the column with guide bolts require high accuracy of installation of structures to ensure that the bolts of the column get into the holes of the crossbars, which increases the complexity;

- the use of embedded parts increases the material consumption of the joint, which leads to an increase in the cost of the structure.

The closest to the solution and the achieved effect is the butt joint of the reinforced concrete crossbar and the column (USSR Author's Certificate No. 767305, 01.24.74, class E04B 1/38), including the reinforcing outlets of the crossbar and the column located in the upper part, butted together, and in the lower part there is a embedded part located in the column and having a longitudinal ledge in the cantilever part.

The disadvantages of the butt joints of reinforced concrete beams and columns are:

- restriction of its use - only in prefabricated frames;

- the complexity of installation due to the large number of welded works;

- increased metal consumption due to the presence of massive embedded parts;

- increased energy costs due to the implementation of the connection of prefabricated elements by welding reinforcing outlets.

The utility model is aimed at creating a rigid assembly of the crossbar with the column, which allows it to be used in the construction of prefabricated monolithic frame buildings of high storeys, while ensuring high reliability of the pair, reducing the complexity in the manufacture of prefabricated elements due to the simplicity of formwork and high manufacturability.

The result is achieved by the fact that the junction of the crossbar with the column, consisting of a precast reinforced concrete column with a hole in the level of overlap, precast bolts with reinforcement outlets at the ends and on the upper face, while the vertical outlets are located along the length of the crossbar with a fixed pitch, and on the end faces dowels are made in the form of horizontal recesses of a triangular section, and prefabricated floor slabs with a gap between their ends, monolithic at the same time with a hole in the columns, the reinforced outlets from the prefabricated rigs released into them To support and reinforcement to be laid in a monolithic part beams, concrete columns have an opening height equal to the total height of the beam and the precast monolithic part, the end surfaces of precast floor slabs must be performed to the inclined plane of the plate.

A utility model is illustrated in the drawings. Figure 1 shows the node pair of the crossbar with the column. Figure 2 shows a section 1-1 node pairing the crossbar with the column.

The interface consists of a prefabricated column 1 having a hole 2 in the level of overlap, a prefabricated crossbar 3, the end faces of which have horizontal recesses of a triangular section 4, with releases of reinforcement 5 on the upper face with a fixed pitch s and along the ends 6, of prefabricated floor slabs 7, connected by simultaneous monolithic holes 2 in the column 1. The monolithic part of the crossbar 8, coincides with the gap between the prefabricated floor slabs 7, based on the prefabricated crossbar 3, the releases of the reinforcement 5 along the upper face of the precast crossbar provide local work team 3 and 8 parts monolithic pins, which fit in the level of a monolithic part 8 of the support fittings 9.

The assembly of the crossbar with the column experiences a complex deformed state when it is operated as part of the frame. The tensile forces arising in the upper zone of the supporting part of the precast-monolithic crossbar are perceived by the supporting reinforcement 9. The compressive forces are perceived by the monolithic concrete, and the cutting forces by the concrete keys 4. The advantage of this coupling unit is that two components are included in the work - monolithic and precast concrete. Thus, we obtain a rigid interface even without welding.

The joint work of the monolithic part 8 and the prefabricated crossbar 3 is achieved by ensuring the strength of the contact seam due to the operation of the vertical outlets of the reinforcement 5 along the upper face of the precast crossbar 3 installed with a fixed pitch s.

The number of dowels 4 along the end face of the crossbar 3 can vary depending on the cross-sectional height of the crossbar. The bearing capacity of the interface increases due to the work of the keys 4 on the slice, the triangular shape of which, according to the results of experimental studies, provides the greatest strength.

Prefabricated floor slabs 7, based on a prefabricated crossbar 3, have slanted end faces that are inclined to the plane of the slab with an inclination angle of 14 ÷ 16 ° over the entire section height to form a section of the monolithic part of the crossbar.

The proposed assembly of the crossbar with the column allowed it to be used in the construction of prefabricated monolithic frame buildings of increased number of storeys, to increase the rigidity and reliability of the coupling of the crossbar with the column due to work in the compressed zone of monolithic concrete, and in the stretched - reinforcement, to reduce the complexity in the manufacture of prefabricated elements due to simplicity of formwork and reducing the number of sizes, while increasing the manufacturability of the assembly.

Claims (1)

The coupling of the crossbar with the column of the reinforced concrete frame of the building, including the prefabricated column with a hole in the level of the floors, prefabricated crossbars with reinforcement outlets at the ends and on the upper face, with vertical outlets located along the length of the crossbar with a fixed pitch, and dowels in the form of horizontal recesses of a triangular section, and prefabricated floor slabs with a gap between their ends, monolithic at the same time with a hole in the column, reinforced outlets from the prefabricated crossbar and supporting reinforcement released into it minutes, laid in a monolithic part beams, wherein the aperture in the reinforced concrete column at the overlap formed height equal to the total height of the beam and the precast monolithic part and end surfaces of precast slabs are inclined to the plane of the panel along its entire height.