SU924294A1 - Prefabricated floor - Google Patents

Description

The invention relates to the construction, and more specifically, to a constructive device flat interfloor overlappings and coatings of prefabricated, mainly reinforced concrete structures of all sectors of the national economy, mainly used in multi-storey frame and panel industrial and civil Buildings.

Known construction precast ceiling, made within the cell columns of the contour trapezoidal plates, based on the corners of the protrusions of the columns with planes at an angle to the horizon, and medium-sized rectangular plates, supported on the ends of the contour plates and located in the horizontal plane. The result is a light, but pierced overlap design [1].

The disadvantages of this design are the impossibility of the device of a smooth floor and ceiling without additional 2

body activities, as well as increased construction height.

The closest in technical essence and the achieved result to the proposed solution is a assembled, overlapping, including slabs, contour beams supported on columns [2].

The disadvantage of this design is the increased complexity of manufacturing due to the large number of different elements.

The purpose of the invention is to simplify the design and installation.

This goal is achieved by the fact that in prefabricated floors, including slabs, contour beams supported on columns, contour beams are wide-flanged, T-section, and the plates are laid on the console shelves of the latter in the same level with them, and the supporting edges of the shelves and slabs are beveled at an angle 45 ° to the vertical.

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FIG. 1 shows the overlap plan; in fig. 2 - the same, cross section; in fig. 3 is a plot of bending moments in the elements of the team slab overlap. 3

The overlap includes the edges of the beams 1 and shelves 2, plates 3, columns 4 'inclined seams 5 and supporting fixtures 6, on which with slab 8, with contour, inclined faces 8, and their mortgages with a gap for the monolithing seam parts are welded to the plates 9. Next, the seams 5 between the inclined face-. MI slabs are filled with mortar or “concrete.

Installation of the ceiling is as follows.

Beams with wide trapezoidal shelves, the overhangs of which in each direction are equal to a quarter of the span, were set-. vajvayutsya in two directions along the contour of each cell and connected to the columns, after which on the ends of the shelves on four sides rely right-angled plates that fill the middle zone of each cell. At the same time, the width of the contour and middle overlapping elements for medium cells is assumed to be the same, not exceeding, for example, for ed of the grid of supports 6x6 m of three meters, which is necessary according to the conditions of transportation. For interfacing with each other and with the middle plates, the contours of the elements in the plan have the shape of a trapezoid. As a result, the pairing of middle plates with shelves of contour elements is carried out along lines that are close to the lines of zero bending moments in monolithic plates embedded in four. to the sides, the slab of prefabricated floors the size of a cell with free support of the middle plates on the contour plates will work as monolithic, embedded on four (.or two) sides ^ and the slab of beams in the places of interfacing with the ribs, where the greatest efforts act, are made monolithic with the ribs in the factory . In addition, the pairing of medium plates with shelves of contour elements having the same thickness of the slab with the plates is arranged in the same level, for which the mating faces: the plates are made inclined, and the seams between them are filled with a solution for a dense support device. On mon- ⁵⁵

the same middle plates are supported on angular sheets that are temporarily fixed on the installation or welded to the embedded parts of the shelves of the contour elements during manufacture, which can also serve as additional connections for all the mates of the floor elements. In panel buildings, only the extreme contour elements should have edges, while in the middle contour elements when resting on the transverse walls, the ribs can be, but can be absent. The shelves of the contour elements and the middle plates can be solid, often ribbed or with voids, with and without pre-stress.

Contour elements can be made without ribs with reinforced longitudinal reinforcement between the columns.

In this case, bebalk-less capless overlap can be obtained. In the case of the use of contour plates with edges in only one direction, and in the other without edges, we will have a traditional girder overlap.

At the same time, the last contour elements may not be connected to the columns, but to carry out the appointment of floor slabs. As a result, a structure that works as a slab overlapped on both sides can be obtained.

Claims (1)

Claim Prefabricated ceiling, including plates, contour beams supported on columns, characterized in that, in order to simplify the design and installation, contour beams are wide-bore, T-section, and the plates are laid on the console shelves of the latter in the same level with them, and the supporting edges of the shelves and slabs are beveled at an angle of 45 ° to the vertical.