RU145370U1 - REINFORCED CONCRETE BEAM - Google Patents

Abstract

1. Reinforced concrete beam, characterized in that it consists of a middle reinforced concrete beam element, on the upper and lower sides of which are embedded parts of sheet metal, in addition, parallel to the embedded parts and with a gap placed upper and lower steel belt elements of sheet metal, and in the gap between the embedded parts and the steel belt elements, steel shear bonds are established by welding with metal penetration. 2. Reinforced concrete beam according to claim 1, characterized in that the embedded parts and composite waist elements are equipped with a system of holes having a constant pitch for installing steel shear bonds.

Description

The utility model relates to the field of construction, namely to reinforced concrete beams, and can be used in structures designed to work on transverse bending, mainly in structures of ceilings and coatings of buildings and structures.

In the prior art, various versions of reinforced concrete floor beams are known.

Reinforced concrete beam consisting of a concrete core with steel stiffeners is known from document CN 103233537 A.

The disadvantage of this beam is its low rigidity.

From the document KR 101232323 B1, a beam is known, which consists of tee channels that are connected at an angle, between which a concrete core is located.

The disadvantage of this beam is also low rigidity.

The closest analogue of the claimed utility model is document WO 2011012974 A2, of which a reinforced concrete beam is known, consisting of a tray steel duct, inside of which there is a reinforced concrete core with stiffening elements inside.

The disadvantage of the closest analogue is the low rigidity of the structure.

Thus, the technical result to which the claimed utility model is directed is to increase the rigidity of the beam.

The claimed technical result is fully achieved by a set of features of an independent paragraph of the claimed formula of the utility model.

The proposed beam design changes the mode of operation of the beam, the bending moment is practically eliminated from the main factors determining the strength and stiffness of the structures, the beam works mainly on transverse and shear forces, that is, mainly on compression-tension.

A reinforced concrete beam consists of a middle reinforced concrete beam element with embedded parts along the upper and lower belts of sheet metal, upper and lower steel belt elements of sheet metal, installed in parallel and with a gap to the embedded parts, as well as steel shear ties having an equal-angled cross-section.

Steel shear bonds are installed in the gaps between the embedded parts and steel belt elements.

Further, in more detail, the claimed utility model is illustrated by drawings, in which:

In FIG. 1 shows a general view of a beam;

In FIG. 2 - section 1-1 in FIG. one;

In FIG. 3 - Node “A” in FIG. one;

In FIG. 4 is a view of a embedded part or a steel waist member;

In FIG. 5 is a view of a steel shear bond.

The claimed reinforced concrete beam consists of a middle reinforced concrete beam element (1), on the upper and lower sides of which are embedded parts (2) of sheet metal. In parallel with the embedded parts (2) and with a gap, steel belt elements are placed: the upper (3) and lower (4) from sheet metal. In the gap between the embedded parts (2) and the steel belt elements (3, 4), steel shear bonds (5) are installed by welding with metal fusion. In addition, embedded parts (2) and composite waist elements (3, 4) are equipped with a system of holes (6) having a constant pitch for installing steel shear ties (5).

Steel shear bonds (5) are mounted parallel to each other across the beam itself.

This embodiment provides greater rigidity, allowing the structure to withstand heavy loads.

Such a structural solution of a reinforced concrete beam is based on the effect of replacing the bending moment with transverse and shear forces. Bending moments, insignificant in size, are localized mainly within the pitch of steel shear bonds, and do not accumulate along the length of the beam.

The parameters of the limiting states of the reinforced concrete beam are regulated by optimizing the gap between the embedded parts and the composite waist elements and the pitch of the steel shear bonds.

The bearing capacity of the reinforced concrete beam structure is determined by the maximum edge stresses and the maximum shear stresses in the steel shear bonds.

The optimal stiffness of steel shear bonds will be such that the load-bearing capacity of the beam is the same according to these two criteria.

Thus, the implementation of reinforced concrete beams of the above structure provides an increase in the rigidity of the structure.

Claims (2)

1. Reinforced concrete beam, characterized in that it consists of a middle reinforced concrete beam element, on the upper and lower sides of which are embedded parts of sheet metal, in addition, parallel to the embedded parts and with a gap placed upper and lower steel belt elements of sheet metal, and In the gap between the embedded parts and the steel belt elements, steel shear bonds are established by welding with metal penetration. 2. Reinforced concrete beam according to claim 1, characterized in that the embedded parts and composite waist elements are equipped with a system of holes having a constant pitch for the installation of steel shear bonds.