RU63394U1 - COMBINED FITTINGS FOR REINFORCED CONCRETE FLOORS - Google Patents

Abstract

Combined reinforcement can be used as fixed formwork in the production of reinforced concrete structures. The utility model is aimed at increasing the bearing capacity and reliability of reinforced concrete structures through the use of corrugations of complex section and stamping on the shelves of a profiled sheet, which allows to increase the adhesion of the sheet to concrete and redistribute the loads arising in the supporting structure. The presence of additional elements in the form of anchor stops (stud bolts, electrical rivets) makes it easier to assemble finished reinforced concrete structures.

Combined reinforcement (figure 1) is a corrugated metal sheet (1) with a trapezoidal shape of the profile of the corrugations, longitudinal zigzag broken lines are stamped on the side walls (2) (3); on the upper shelf (4), an additional corrugation (5) with a cross-section in the form of a “dovetail” is formed along the entire length, and on the lower shelf (6) there is a longitudinal stamping (7).

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Description

The design claimed as a utility model relates to construction, namely, to reinforcement for concrete made of profiled metal sheets. This design can be used as a fixed formwork in the production of reinforced concrete structures, and also as a lower supporting sheet reinforcement, included in the calculation of the bearing capacity of reinforced concrete slabs.

Known manufactured by the industry in accordance with GOST 24045-94 steel sheet corrugated bent profiles with trapezoidal corrugations having protrusions on the upper and lower shelves used as fixed formwork for monolithic reinforced concrete slabs [1].

The use of such a profiled sheet as a reinforcing element in a reinforced concrete structure is ineffective because of the weak adhesion of the smooth surface of the walls to concrete. The technical solution [2], chosen as the closest analogue, is a corrugated metal sheet with a rectangular or trapezoidal shape of corrugations, on the side walls of which a continuous (as an option - interrupted) stamping is made in the form of a zigzag broken line with the same bending angles and height not less than half the height of the wall. In this case, due to the presence of protrusions on the side surface of the corrugation walls, better adhesion of concrete to the surface of the metal reinforcement is achieved, but the presence of smooth surfaces of the upper and lower shelves reduces this effect.

The aim of the proposed technical solution is to increase the bearing capacity and reliability of reinforced reinforced concrete structures by increasing the adhesion strength of reinforcement with concrete achieved by more efficient use of the surface of a profiled metal sheet. Figure 1 shows a General view of a profiled sheet, proposed for use both as a fixed formwork and as a lower supporting sheet reinforcement, included in the calculation of the bearing capacity of a reinforced concrete slab, the additional elements of which are anchor stops of the HILTI type, stud bolts or electric rivets (Fig.2-4). Electro rivets can be directly welded to the supporting structures, or fastened by welding through washers.

The reinforcement (figure 1) consists of a corrugated metal sheet 1 with a trapezoidal shape of the profile of the corrugations; longitudinal ledges in the form of zigzag broken lines 3 are stamped on the side walls of the reinforcement 2; a protrusion is formed along the entire length of the upper shelf 4

(additional corrugation) 5 with a profile section in the form of a “dovetail”, and on the lower shelf 6 there is a longitudinal stamping 7.

In order to improve the manufacturability of construction works carried out using reinforced concrete structures, the proposed reinforcement can be equipped with anchor stops (8, Fig. 2) or stud bolts (8, Fig. 3) or electric rivets (8, Fig. 4).

Comparative analysis with the closest analogue [2] allows us to conclude that the claimed design of the profiled sheet used as reinforcement differs from the known one by the presence on the shelves of additional elements in the form of corrugations of complex section and longitudinal stamping (ie, more efficient use of bearing surfaces), and also - the presence of additional fastening elements in the form of anchor stops (stud bolts, electro-rivets). Thus, the claimed technical solution meets the criterion of "novelty."

The longitudinal protrusion (5, Fig. 1) on the upper flange and the stamping (7, Fig. 1) on the lower flange of the profiled sheet form additional stiffeners, which provide greater resistance to bending of the reinforcement. In addition, the use of a sophisticated upper shelf can improve the adhesion of the metal sheet to concrete.

Thus, the profiled sheet proposed as a reinforcing element for a reinforced concrete structure provides a technical effect of increasing the strength of the reinforced concrete structure. The presence of additional structural elements for fastening to the longitudinal beams in the form of anchor stops (stud bolts, electrical rivets) makes it easier to assemble finished concrete structures.

The proposed reinforcement for building construction can be made using known in the art means and materials, therefore, has industrial applicability.

Information sources:

1. GOST 24045-94 Bent steel sheet profiles with trapezoidal corrugations for construction. Group B22. Interstate standard. Date of introduction 1995-09-01.

2. Copyright certificate of the USSR No. 1557289, Cl. E 04 C 5/03, publ. 04/15/90.

Claims (4)

1. Combined reinforcement for reinforced concrete floors, containing corrugated metal sheets with a trapezoidal shape of corrugations, on the side walls of which there are protrusions in the form of zigzag broken lines, characterized in that on the upper shelves of the corrugations there are protrusions with a cross-section in the form of a dovetail, and on the lower shelves of the corrugations along the entire length made longitudinal protrusions. 2. Combined reinforcement for reinforced concrete floors according to claim 1, characterized in that it has additional elements in the form of anchor stops. 3. Combined reinforcement for reinforced concrete floors according to claim 1, characterized in that it has additional elements in the form of stud bolts. 4. Combined reinforcement for reinforced concrete floors according to claim 1, characterized in that it has additional elements in the form of electrical rivets.