SU1544901A1 - Ferroconcrete skeleton of building or structure - Google Patents

Abstract

The invention relates to reinforced concrete frames of buildings or structures. The purpose of the invention is to reduce material consumption and labor intensity due to more complete use of the strength properties of reinforcement and concrete. At the junction points of the monolithic columns with the floor slabs, additional reinforcement is installed, passing in the floor slabs along the pressure curve from the main combination of operating load and prestressing forces. The sections of the floor slabs adjacent to the columns are made of concrete, which has greater strength than the concrete of the rest of the floor slabs. 1 hp ff, 5 ill.

Description

The invention relates to the construction and can be used in the construction of monolithic reinforced concrete frames of buildings or structures with the voltage of the reinforcement of the ceilings during installation.

The purpose of the invention is to reduce material consumption and labor intensity due to more complete use of the strength properties of reinforcement and concrete.

Figure 1 shows a fragment of the building, top view; figure 2 - section aa in figure 1; fig.Z - node I in figure 1; figure 4 - section bB in fig.Z; figure 5 - section bb In figure 1.

The reinforced concrete frame of a building or structure contains columns 1

and floor slabs 2, combined with columns 3 pre-stressed at the construction site with reinforcement 3. Last placed in joints 4 between floor slabs 2 and in the alignment of columns 1, skipped in channels 5 in the body of columns 1, annealed around the perimeter of the building and monolithic with concrete 6 .

The floor plates 2 are connected to the columns 1 by means of additional reinforcement 7, located diagonally in the plan in the body of the columns 1 in the lower level of the plates 2 and in the latter along the curve from the main combination of the heating load and the prestressing forces.

S

4b

ABOUT

The sections of 8 slabs of 2 floors, adjacent to columns 1, are made of concrete, which has greater strength than the concrete of the rest of the 9 plates of 2 floors.

The floor slabs 2 are interconnected by reinforcement 10 to ensure their joint operation and can be made flat, ribbed or hollow.

Edge beams 11 on the external counter of a building or structure may be excluded. In this case, if necessary, balcony arrangements, balcony plates 12 have consoles 13, on which anchors 14 of prestressed reinforcement 3 are attached.

Columns 1 can be made prefabricated with monolithic sections between the plates 2 floors.

The mounting of the frame is carried out as follows.

Non-stressing reinforcement of columns 1, their formwork and shuttering of slab 2 are installed, as well as additional reinforcement 7 at the points of joining slab 2 to columns 1 and fittings 10 connecting the slab 2, tubes (or extractable rods) that form in columns 1 openings 5 for the passage of tensioned reinforcement 3.

On the formwork of slab 2, liners are installed to form seams 4 between the cells of slab 2 and concreting the columns 1 and slab 2 are carried out. When the concrete reaches 15 minimum strength, the liners are removed, which form the seams A between the cells of the slab 2 overlap, B these seams 4 stack the tension reinforcement 3, tension the tension reinforcement 3, fill the concrete 6 with the seams 4 and after it hardens, disassemble finished slab 2 overlap

and columns 1. The prestress in this case changes the statics of the operation of the slabs 2 of overlap, since the perception of the external transverse load is carried out not by bending, but by membrane forces. Therefore, there is no need to perceive the negative moment over the support (as well as in the span). The reinforcement 7 in the junction of the slab 2 with the column 1 in this case is not installed above the support, but in the lower compressed zone and does not work for stretching, but for compression, which makes it possible to significantly reduce the brand of the concrete of the slab 2 and the flow rebar.

about rmu l and

the invention

0

5 Q

five

0

Claims (2)

1. Reinforced concrete frame of a building or structure, including columns and floor slabs, combined with columns of reinforcement pre-stressed at the construction site, placed in the joints between the floor slabs and in the alignment of columns, missed in the channels in the body of the and monolithic concrete, characterized in that, in order to reduce material intensity and labor intensity by more fully using the strength properties of reinforcement and concrete, the floor slab is connected to the columns by means of additional reinforcement located in the body of the columns in the level of the floor slabs and in the latter along the pressure curve from the main combination of operating load and prestressing effort. 2. The reinforced concrete frame according to claim 1, characterized in that the portions of the floor slabs adjacent to the columns are made of concrete having greater strength than the concrete of the rest of the floor slabs. L and mewt i ± W r -. S Fiel Fig.Z 15 FI.5