SU410148A1 - - Google Patents

Description

one

The invention relates to the field of construction and is intended to be used as reinforcement for prestressed concrete products.

A reinforcing rope for reinforcing reinforced concrete products is known, including a single-layered twist of wires of different diameters, in contact with the central rod.

However, in the known rope all thick wires of the layer are placed evenly over the cross section of the strand and the width of the recesses for securing the rope in the concrete is smaller and their number is larger.

A wider recess increases the strength of concrete protrusions and creates better conditions for concrete, and also expands the possibility of using concrete of different grades, including those with larger aggregate.

The aim of the invention is to increase the anchoring capacity of a rope in concrete, for which wires of the same diameter are placed in two opposite located sections of the cable section and separated by two groups of wires of smaller diameter.

FIG. Figure 1 shows schematically the cross sections of the reinforcing rope; in FIG. 2 is a cross section of a rope of 12 wires in the outer layer (section along AA in FIG. 1);

in fig. 3 is a cross section with a twisted central rod (section along BB in FIG. 1). The principle of construction of reinforcing rope

next: a layer of round wires of different diameters is wound around the central core 1 with a round cross-sectional shape, the wires of the largest diameter are 2 equally divided and are symmetrically placed in two opposite

plots pd. FIG. 1 in cross section of such wires are two, and in FIG. 2, 3 - their number is four, since the transverse normal cross section of the strand can consist of any even number of wires.

Between the two groups of wires of the largest diameter, as well as around the core, equally thin and symmetrically thinner wires 3 are placed. With such a set and arrangement of the wires, the outer section coitures

A strand of twisted round wires will not have the form of a circle, but will be a contour in the form of a closed curve of variable curvature. The contours of the two adjacent sections aa and b-

They are rotated relative to each other around the longitudinal geometric axis of the rope and their identical position is only twice observed along the length of the lay. The central angle p between the centers of adjacent wires

The largest diameter of one group differs in size from the angle Pd between the wires, located in different groups Pi Pr.

The linear segment of such a rope is a spatial body of complex configuration. The difference between the area of the circle of maximum radius and the area of the contour of the rope section corresponds to the sum of the areas of the sections of the concrete protrusions of the structures, which additionally participate in mechanical engagement with the reinforcement.

 2

Subject invention

A reinforcing rope for reinforcing reinforced concrete products, including a single-layered twist of wires of different diameters in contact with a central rod, characterized in that, in order to increase its anchoring capacity in concrete, the wires of the same diameter are placed in two oppositely located sections of cable section and separated by two groups of wires smaller diameter.

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