SU1643682A1 - Prefabricated reinforced concrete slab - Google Patents

Abstract

The invention relates to the construction of industrial, civil and agricultural buildings and structures. The aim of the invention is to reduce the consumption of materials due to the rational distribution of the material along the length of the slab while simplifying production. In the team panel, the ribs 3 are made of two parts, pivotally connected to one another at the level of the bottom face. In the middle part of the span, the ribs have a variable height, increasing from the center to the ends. As a result of this construction, a groove is formed in the ribs 3, closing the top of the slab 1. The stiffening elements 5 are placed in the groove between the slab and the ribs. 3 il.

Description

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The invention relates to the construction of industrial, civil and agricultural buildings and structures,

The purpose of the invention is to reduce material consumption by rational distribution of the material along the length of the panel while simplifying manufacture,

FIG. 1 shows a reinforced concrete panel, a general view; FIG. 2 is a section A — A of FIG. one; in fig. 3 shows a section BB in FIG. one.

The reinforced concrete panel includes slab 1, which is pre-stressed in two directions and provided in the extreme sections (1/8 - 1/6 of the span) with fixed parts 2 thin reinforced concrete strip of constant thickness, and longitudinal vertical ribs 3 of thin reinforced concrete strip variable cross-sectional height having hinges 4 in the middle of the span. The ribs are connected to the slab at the extreme sites (1/8 - 1/6 of the span) with the help of rod elements 5 of rigidity and welding of embedded parts 2, and in the middle part (2/3 + 3/4 of the span) only through the rod elements of rigidity 5 . Core stiffener elements 5 are welded to the plate and the fins of the panel.

Reinforced concrete panel works on supporting sections as a beam. The lower parts of the ribs 3 in these areas perceive tensile forces, the upper parts - the compression. In the middle part, the panel works as a plate with expansion, connected in length through stiffening elements 5 with ribs to ensure its stability as a flexible element. The presence of a hinge coupling in the middle of the ribs leads to an arched effect, expressed in the fact that the slab perceives thrust, which is transmitted to it at the junction with the ribs, by means of embedded parts 2 and stiffening elements 5.

Variable in the middle of the panel, the height of the cross section of the ribs contributes to the reduction of the material intensity of the structure. And

shear strength is not reduced in this case, since in this area the shear force decreases to zero.

The absence in the middle of the plate and the edges of embedded parts due to the fact that

the connection is made only through stiffeners, which provides a significant reduction in the labor intensity of panel production.

Claims (1)

Invention Formula A prefabricated reinforced concrete panel comprising a slab with longitudinal and transverse prestressed reinforcement, ribs extending downward, stiffeners placed along the ribs, embedded parts for connecting the ribs to the slab, characterized in that. that, in order to reduce material consumption by distributing the material along the length of the panel while simplifying manufacture, each edge is made of two equal parts, pivotally connected in the level of the lower edge and having a variable in the middle part of the span, a height increasing from the center to form a notch along the length of the edge, closed at the top by the slab, and stiffeners are installed in the notch between the slab and the ribs. Y /////////. ////////////////// Aa / 77 /////// 1 FIG. I / 7 /// 7/1 3