RU2564720C2 - Junctional coupling of pillar with solid slab - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to construction and may be used to erect slabs of civil and industrial buildings. A junctional coupling of a pillar with a solid slab comprises a pillar, a slab and meeting beams, at the same time the beam number may be more than four. The junction is based on the even distribution of beam reinforcement in the slab plane, which transfers forces to a guncrete core placed in the body of the pillar. Beam reinforcement is fixed on a section of a pipe fixed to the longitudinal working reinforcement of the pillar. The diameter of the pipe is determined according to the clearance between the working reinforcement of the beams. At the same time reinforcement of the beam of the horizontal layer made of two angular rods represents a single rod that covers the pipe section. The rod of each beam adjoins directly the surface of the pipe section with displacement in the vertical plane (as if along the thread), then at the distance from the section the rod extensions are levelled in the horizontal plane and enter the beam body.

EFFECT: increased bearing capacity and reliability of a slab.

2 cl, 6 dwg

Description

The invention relates to construction and can be used in the construction of floors of civil and industrial buildings.

Known reinforced concrete column for high-rise buildings [and.with. 962489, USSR, M., cl. ³ E04B 1/18, E04B 1/38, E04C 3/30, claimed 03/10/1981; publ. 09/30/1982, Bull. No. 36], containing a hollow trunk. In the barrel, rods of the upper reinforcing outlets are fixed for connection to the support reinforcement of the crossbars symmetrically located on the diametrically opposite sides of the column, and the support consoles for the said crossbars. The column at the level of abutment of the crossbars is made with holes, and the rods of the opposite reinforcing outlets are rigidly interconnected and passed through these holes. In addition, the column is equipped with a concrete core installed inside the barrel at the abutment level of the crossbars, limited by transverse partitions, with the lower support consoles located at the level of the lower core partition. The disadvantages of this design are: large net weight; increased metal consumption due to reinforcing outlets and support consoles, core partitions; the overlap works in one direction, which increases the structural height of the overlap; the cross section of the column is increased due to the created cavity.

Known reinforced concrete frame of a multi-storey building [and.with. 672301, USSR, M., cl. ² E04B 1/18, E04B 1/38, claimed 09/30/1977; publ. 07/05/1979, Bull. No. 25], including columns, reinforcing outlets of columns with anchor parts, support arms based on consoles of crossbars with outlets of reinforcing support connected to outlets of columns.

The columns have a cavity. Anchor parts of the releases are made in the form of metal clips monochromatic in their cavity. The column on the sections of the reinforcing outlets and the fastening of the supporting tables are equipped with external metal clips. The disadvantages of this design are: large net weight; increased metal consumption due to reinforcing outlets and support consoles, metal clips; the overlap works in one direction, which increases the structural height of the overlap, the increased cross-section of the column due to the created cavity.

The closest in technical essence is bezbolnoe overlap [US Pat. RU 2362856, Russian Federation, C1 IPC E04B 5/43, declared 02/26/08; publ. 07/27/09, Bull. No. 21], including columns without capitals and a flat plate. An n-branch console with annular and radial working fittings, the center of intersection of which coincides with the axis of the column, is placed in the body of the plate. The branches of the n-branch console are rigidly attached to the trimming of the pipe. The pipe cut is placed inside the column so that the axis of the pipe cut coincides with the axis of the column. The circumference of the pipe cut is greater than the total width of the shelves of the branches of the n-branch console. The length of the pipe cut is determined by the total bending moment in the branches of the n-branch console. The disadvantages of this design are: large dead weight, increased metal consumption, since the reinforcement of the floor unit is made not only by reinforcement, but also by the branches of the console, with a significant number of welded joints.

The purpose of the invention is to increase the bearing capacity and reliability of the nodal conjugation of the column with a monolithic overlap.

This goal is achieved in that the nodal conjugation consists of a column, a shelf of a plate and converging beams, while the number of beams is possible more than four. With the number of beams more than four, a monolithic overlap is characterized by increased strength and rigidity, since the beams in addition to the orthogonal directions go in one more direction. For example, a monolithic overlap with diagonal and axial beams has eight converging beams on the column, which are directed at an angle of 45 ° relative to each other, while two diagonal beams of one cell, intersecting in the center of it, ensure the transfer of forces from a uniformly distributed load on the overlap redistributing it equally.

The proposed site is based on the uniform distribution in the plane of the slab reinforcement beams. The beam reinforcement, located in the corners of its section, transfers forces to the pipe-concrete core of the column. The pipe-concrete core of the column is a piece of pipe filled with concrete, placed in the body of the column and attached to the longitudinal working reinforcement of the column. The fittings are fixed on the pipe cut. The diameter of the pipe is determined by the distance in the light between the working reinforcement of the beams. At the same time, the reinforcement of the beam of the horizontal layer, consisting of two corner rods, is the rods of the same diameter, enveloping the pipe scrap along with the rods of other beams. At the same time, the longitudinal horizontal reinforcement of the beam consists of two rods formed by one rod that envelopes the length of the pipe scrap, with the ends of the rod remote from the pipe trim aligned in the horizontal plane and placed in the beam body. The core of each beam is adjacent directly to the surface of the pipe cut with a displacement in the vertical plane as a thread, then, when moving away from the trim, the extensions of the rod are aligned in the horizontal plane of the beam.

Such a unit is applicable to beam-free monolithic floors with the involvement of the required number of rods and a decrease in the structural height of the section of the floor. With a shelf height equal to the height of the beam, hidden beams are obtained in a bezel-less floor. Hidden beams - part of a monolithic slab, the reinforcement of which is carried out according to the principles of beam design, that is, there are clearly defined beam armored belts, transverse reinforcement in the form of clamps. For example, the overlap of series B 1.020.1-7, developed at BelNIIS, Minsk.

The invention is illustrated by drawings. In FIG. 1 shows a plan of the arrangement of reinforcement in a monolithic overlap assembly consisting of a column 1 and beams 2. Column 1 has a longitudinal working reinforcement 3, to which a piece of pipe 5 is attached by means of 4. Beams 2 are reinforced with longitudinal rods 6 that bend around the pipe piece 5.

In FIG. 2 shows a side view of the layout of the reinforcement in the node. The bars of the beams 6 form in the overlap two horizontal layers of reinforcement of the beams of the upper 8 and lower 9. The longitudinal reinforcing bars 6 for the beams 2 are displaced in a vertical plane as by thread near the pipe cut. The shelf of the plate 7 is an integral part of the ceiling, forming together with the beams a ribbed monolithic ceiling.

In FIG. Figure 3 shows an isometry of the layout of the reinforcement in the assembly.

In FIG. 4 shows a section through the beam 2 and partially of the shelf 7. The two upper angular longitudinal horizontal rods 6 of the beam 2 form the upper horizontal layer of the beam 10 and the lower 11. The two lower angular longitudinal horizontal rods 6 of the beam 2 form the lower horizontal layer of the beam 11. Upper horizontal layers of the beams 10, intersecting on the column, form one horizontal layer of reinforcement of the beams 8 near the column. The lower horizontal layers of beams 11 intersecting on the column form another lower horizontal layer of reinforcement of the beams 9 near the column.

In FIG. 5 shows a section through a beam 2 with a shelf height equal to the height of a beam without beam overlapping with a hidden beam.

In FIG. 6 shows a side view of the arrangement of reinforcement in the bezel-less assembly near the column 1.

Nodal conjugation of the column with a monolithic overlap makes it possible to couple up to eight beams on the column or a device without beams. Due to the arrangement of beams in four or more directions, the structural height of the floor as a whole is reduced. Thus, the use of bending of the reinforcement of beams on a concrete core embedded in a column for monolithic floors in construction practice will increase the bearing capacity and reliability of the floor, as well as significantly improve the consumption of materials, cost and labor intensity of construction.

Claims (2)

1. Nodal conjugation of the column with a monolithic overlap, consisting of converging beams, a shelf of a slab and a column, characterized in that the number of beams converging on the column is possibly more than four; in the body of the column is a pipe-concrete core attached to the longitudinal working reinforcement of the column, the diameter of the pipe of which is determined by the distance in the light between the working reinforcement of the beams; reinforcement of one horizontal layer of the beam, consisting of two angular rods, formed by one rod enveloping the trim, which is adjacent directly to the surface of the trim with a displacement in the vertical plane, then, when removed from the trim, its extensions are aligned in the horizontal plane of the beam. 2. Nodal conjugation of the column with a monolithic overlap according to claim 1, characterized in that with a larger number of rods and a decrease in the structural height of the cross-section of the overlap, hidden beams are made in the body of the slab, thereby obtaining a girderless overlap.

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