SU1746893A3 - Column and covering plate connection unit - Google Patents

Abstract

Usage: at the junctions of the columns and the floor slab. SUMMARY OF THE INVENTION: The junction of the columns and the slab assembly includes interconnected upper and lower columns and a slab having a mounting hole with beveled ends in the upper and lower portions with the formation of a triangular prism, a shell around the perimeter of the hole. The invention relates to the construction, in particular to the construction of frame buildings with flat frames without capillary ceilings of different heights. A well-known junction of the column and slab, containing a team column, made in height with a break in the concrete level overlap, and a team floor slab, made with a hole with beveled ends in its lower part to pass the column and shell, rigidly attached around the perimeter of the hole to the working plate fittings and is supplied rigidly attached to the working fixture of the plate, and connecting elements attached to the top of the shell and the working fixture of the column. The assembly is provided with a connecting rod and loop-shaped outlets of the working reinforcement of the column, the connecting elements are made dihedral with an inner surface corresponding to the outer surface of the shell and rigidly connected to it, and an outer edge parallel to the release of the working reinforcement of the column and attached to it, the upper columns are made in the shape of a truncated pyramid with a central hole through which the connecting rod is passed. A variant is provided for supplying the unit with a reinforced concrete vertical link and a table with a base plate, which is elastically connected to the bond parts and rigidly attached by one side to the upper face of the prism of the shell of the overlap plate and by the other side to the fixed part of the column. 1 hp f-ly, 5 ill. Additional rods located in the lower zone of the plate, and provided with rods connecting the slab working armature with additional shell rods and attached to the column by connecting the working reinforcement of the latter with the shell. The closest to the proposed technical entity is the assembly of prefabricated monolithic reinforced concrete frameless frameless frame, which includes a combined column connected to the assembly and a prefab slab.

Description

ti. made with a mounting hole with beveled ends in the upper and lower parts, forming a triangular prism, a shell around the perimeter of the hole rigidly attached to the slab working reinforcement, and connecting elements attached to the upper part of the shell and the working reinforcement of the column.

The disadvantages of the known assembly are the increased intensity and complexity associated with the significant amount of welding and concrete work required to embed the joint, the impossibility of joining the overlapping columns, the interconnected columns, and the columns together in one assembly.

The aim of the invention is to improve the reliability of the frame, reducing the complexity and material consumption.

This goal is achieved by the fact that the assembly is provided with a connecting rod and loop-shaped releases of the working reinforcement of the column, the connecting elements are made dihedral with the inner surface corresponding to the outer surface of the shell and rigidly connected to it, and with an outer edge parallel to the release of the working reinforcement of the column and connected to it, at the same time, the connecting ends of the lower and upper columns are made in the shape of a truncated pyramid with a central hole through which the connecting rod is passed.

In addition, the node is provided with a reinforced concrete vertical link and a table with a base plate, elastically connected to the mortgage details and connected rigidly by one side to the upper face of the prism of the shell of the overlap plate, and the other side to the fixture on the face of the column; The free release of the embedded part attached to the table's base plate and the thickness h of the latter are determined by the formulas

l 0.3 Nb3 sin a.

v

Elhj

h-1,225

T

Nb sin a Rl

where N is the force due to;

b is the distance between the outer edges of the embedded parts of communication:

R is the calculated resistance of steel;

I is the width of the base plate;

a is the angle of inclination of the bond to the horizon:

E is the modulus of elasticity of steel.

Fig, 1 shows a node in the usual version, a cross-section; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1; figure 4 - node in seismic performance, cross section: figure 5 - section bb In Fig 4.

The frame assembly contains the top 1 and bottom 2 columns, a prefabricated slab 3 with a mounting hole 4 with beveled ends 5 in the top and bottom for passing the columns forming a triangular prism 6, and a shell 7 rigidly attached around the perimeter of the opening to the working fixture 8 slabs. Knot

provided with connecting elements 9. attached to the upper part 10 of the prism of the shell. The connecting elements are made dihedral with an inner surface that coincides with the outer surface of the corners of the shell. The outer edge 11 of the connecting element, made for example from a corner, is arranged parallel to the release of the working reinforcement 12 of the column and is welded to it. The ends

the lower and upper columns are made in the form of a truncated pyramid 13. In the lower column at the top of the truncated pyramid, a hole is made with a branch pipe 14 for the installation of the connecting centering rod

15, located at the top of the truncated pyramid at the end of the upper column. The upper column is made with loop-shaped releases of the working reinforcement 16.

In order to perceive horizontal impacts, including seismic ones, the node is equipped with a reinforced concrete vertical link 17, which has a fixed connection outlet 18 welded to a supporting table 19. The supporting table has a support 20,

one side of which is welded to the top

edges of the prism of the shell of the slab,

and the other side - to the embedded part 21 on

the verge of the column. The table is equipped with a support

plate 22, installed parallel to the slab, and the distance from the base plate to the reinforced concrete connection is equal to the size q of the free release of the embedded part of the connection. The thickness of the slab h and the gap formed by the concrete body of communication and the surface of the slab, equal to the size of the free release of the mortgage bond d, are determined by the formulas respectively

h 1.225

T

Nb sin a.

6

0.3 Nb3 sin a Elh3

Rl

The assembly of the assembly at the construction site is carried out as follows.

After installing the bottom column 2, a known mounting fixture for slabs (not shown) is installed on which the slab 3 is installed with the shell 7 and the outlets of the reinforcement 8 to the design position. The connecting elements 9 are then laid in such a way that the outer face of the element adjoins the release of the working reinforcement 12 of the lower column 2, and the faces lie on the planes of the casing 7. Then the connecting elements 9 are welded to the casing 7 and the reinforcement 12 of the column 2. Thereafter, top column 1. while the nozzle of the central hole 14 in the bottom column 2 is filled with cement. The rod 15 is fixed in the hole 14, the columns 1 and 2 are aligned in the design position. When installing columns 1 and 2, the lower column is not required to be welded to the upper one, which allows to significantly simplify installation and reduce labor costs. Then the concreting of the node cavity (not shown) is performed. After the joint has been monolithic and the required strength has been reached, the mounting devices are removed.

The proposed unit has great strength and reliability, since the strength of the joint is provided by concrete, sandwiched by the shell 7, which is connected to the column 1, 2 and the slab 3. The reliability of the joint is enhanced by the use of a central rod 15, which takes tensile forces at the joint and ensures the fixation and accuracy of installation of the upper column 1. The increased strength of the concrete at the joint due to the shell 7 prevents the traditional welding of compressed reinforcement of the joined columns. The design of the proposed joint allows vertical reinforced concrete ties to be attached to it without changes, using for installation an additional element in the form of a supporting table 22. welded to the sidewall 7.

Claims (2)

Claim 1. Column and slab connection assembly including interconnected upper and lower columns and an overlap plate, having a mounting hole with beveled ends in the upper and lower parts to form a triangular prism, shell around the perimeter of the hole rigidly attached to the working fixture plates, and connecting elements attached to the upper part of the shell and the working reinforcement of the column, characterized in that, in order to increase the reliability and reduce the labor-intensiveness and material intensity of the assembly, it The connecting rod and loop-shaped releases of the working reinforcement of the column, the connecting elements are double-edged with an inner surface corresponding to the outer surface of the shell and rigidly connected to it, and an outer edge parallel to the release of the working reinforcement of the column and attached to it. and the upper columns are made in the shape of a truncated pyramid with a central hole through which the connecting rod is passed. 2. The assembly as claimed in claim 1, in connection with the fact that, in order to increase reliability in perceiving horizontal loads, it is provided with reinforced vertical communication and a table with a base plate, elastically connected to the embedded parts zi and rigidly attached by one side to the top face of the prism of the shell of the slab of the slab, and the other side to the fixing part on the face of the column, while the size d of free release of the fixing part attached to the support plate of the table and the thickness h of the latter is determined by the formulas d 0.3 Mb3 sin a. Elh ° h 1,225 y / nb sin a i rl where N is the force due to; b is the distance between the outer edges of the embedded parts of the communication; R is the calculated resistance of steel; I is the width of the base plate; a is the angle of inclination of the bond to the horizon; E is the modulus of elasticity of steel. FIG. 2 ЈЩ FIG. five