RU146116U1 - STRUCTURE OF OVERLAP FRAME FROM CROSS BEAMS - Google Patents

Abstract

1. The construction of the building flooring frame, characterized in that it is a flat rectangular structure made of contour, transverse and longitudinal steel beams; contour beams are located along the perimeter of the structure end-to-end; transverse beams are installed perpendicular to two opposite contour beams and parallel to two other contour beams; cross beams are installed with the same pitch; between the transverse beams and the contour beams parallel to them are installed with the same step as the transverse beams — longitudinal beams, the length of each longitudinal beam being equal to the step of the transverse beams; each steel beam consists of a middle bearing element, upper and lower steel belt elements, and steel shear ties; the middle bearing element is a steel welded double tee; upper and lower steel belt elements are made of sheet metal; steel shear bonds have an angular equal-shelf section; upper and lower steel belt elements are installed in parallel and with a gap to the upper and lower belts of the middle bearing element, steel shear ties are established in this gap. 2. The steel beam according to claim 1, characterized in that the lower and upper belts of the middle bearing element and the upper and lower steel belt elements of each beam are equipped with a hole system having a constant pitch for establishing steel shear bonds.

Description

The utility model relates to the field of construction, namely to structures of floor frames made of cross beams, and can be used in structures designed for lateral bending, mainly in large-span structures of floors and coatings of buildings and structures.

Various types of floor frames are known in the art.

From GB 242822 A, an overlapping frame is known which is made of longitudinal, transverse and oblique beams.

The disadvantage of this frame is the low rigidity.

The closest analogue of the claimed utility model is document GB 1088995 A from which the skeleton of overlapping of cross steel beams is known. The frame is made of longitudinal and transverse beams, each of which has a box-shaped cross section, at the corners of which stiffeners are installed.

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

Thus, the technical result, the achievement of which the claimed utility model is aimed at, is to increase the rigidity of the building flooring framework.

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 frame design changes the operating mode: bending moments are practically eliminated from the main factors determining the strength and stiffness of structures, the beams in it work mainly on transverse and shear forces, that is, mainly on compression-tension.

The construction of the building floor frame is a flat structure of contour, transverse and longitudinal beams. Contour beams are located around the perimeter of the structure and are connected to each other. Cross beams are installed end-to-end to two opposite contour beams and parallel to two other contour beams with the same pitch. Between the transverse beams and parallel to them contour beams with the same pitch as the transverse longitudinal beams are installed. The length of each longitudinal beam is equal to the pitch of the transverse beams. All beams are interconnected by any known method (welding, screw-nut connection, riveting, etc.). Each steel beam is a three-element structure consisting of a middle bearing element, upper and lower steel belt elements, and steel shear ties. The middle bearing element is a welded steel I-beam with upper and lower chords connected by a connecting element. The upper and lower steel belt elements are made of sheet metal. Steel shear bonds have an equal-angled cross-sectional angle. The upper and lower steel belt elements are installed in parallel and with a gap to the upper and lower zones of the middle bearing element, in which steel shear bonds are installed with a constant pitch.

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

In FIG. 1 is a diagram of an overlapping frame;

In FIG. 2 is a section AA in FIG. one;

In FIG. 3 is a section 1-1 in FIG. 2;

In FIG. 4 - node "A" in FIG. 2;

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

In FIG. 5 - steel shear bond separately.

The claimed design of the building flooring frame is a flat rectangular structure made of contour (1), transverse (2) and longitudinal (3) steel beams. Contour beams (1) are located around the perimeter of the structure. Cross beams (2) are installed perpendicular to two opposite contour beams (1) and parallel to two other contour beams (1). Cross beams (2) are installed with the same pitch. Between the transverse beams (2) and the contour beams parallel to them (1) are installed with the same pitch as the transverse beams (2) - longitudinal beams (3), and the length of each longitudinal beam (3) is equal to the step of the transverse beams (2). Each steel beam (contour, longitudinal and transverse) consists of an average supporting element (4), upper (5) and lower (6) steel belt elements, and steel ties (7) of shear. The middle bearing element (4) is a welded steel I-beam. The upper (5) and lower (6) steel belt elements are made of sheet metal. Steel shear bonds (7) have an equal-angled cross-sectional angle. The upper (5) and lower (6) steel belt elements are installed in parallel and with a gap to the upper and lower zones of the middle bearing element (4). In this gap, steel shear bonds (7) are installed.

The lower and upper belts of the middle bearing element (4) and the upper (5) and lower (6) steel belt elements are equipped with a system of holes (8) that have a constant pitch for installing steel shear bonds (7).

The connection of the elements of each steel beam is made by welding with metal fusion.

Steel shear bonds (7) are mounted parallel to each other across the tank itself.

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

This constructive design of the frame 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 beams.

The control of the parameters of the limiting states of each steel beam is carried out by optimizing the gap between the belts of the middle bearing element and steel belt elements, as well as the pitch of the steel shear bonds.

The bearing capacity of the floor structure is determined by the maximum edge stresses and the maximum tangential 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 the building flooring frame in the above manner provides an increase in the rigidity of the building structure as a whole.

Claims (2)

1. The construction of the building flooring frame, characterized in that it is a flat rectangular structure made of contour, transverse and longitudinal steel beams; contour beams are located along the perimeter of the structure end-to-end; transverse beams are installed perpendicular to two opposite contour beams and parallel to two other contour beams; cross beams are installed with the same pitch; between the transverse beams and the contour beams parallel to them are installed with the same step as the transverse beams — longitudinal beams, the length of each longitudinal beam being equal to the step of the transverse beams; each steel beam consists of a middle bearing element, upper and lower steel belt elements, and steel shear ties; the middle bearing element is a steel welded double tee; upper and lower steel belt elements are made of sheet metal; steel shear bonds have an angular equal-shelf section; the upper and lower steel belt elements are installed in parallel and with a gap to the upper and lower belts of the middle bearing element, steel shear ties are installed in this gap. 2. The steel beam according to claim 1, characterized in that the lower and upper belts of the middle load-bearing element and the upper and lower steel waist elements of each beam are equipped with a hole system having a constant pitch for establishing steel shear bonds.