SU1491993A1 - Method of securing inclined rigidity ribs to steel girder - Google Patents

Abstract

This invention relates to the field of construction. The purpose of the invention is to reduce the labor intensity of manufacturing and to provide the possibility of reinforcing beams under load. The inclined stiffening ribs 1 are connected to 6 themselves and to the walls of the beam 3. In this case, at the ends of the ribs 1, from the side of the edges adjacent to the wall of the beam, rectangular cuts are made. The ribs 1 are connected to the 6 themselves with the help of the grommets 2 in the form of plates or corners, and with the wall 3 by means of short ones 5. 4 Il.

Description

Figg

The invention relates to construction and can be used to restore or increase the carrying capacity of steel I-beams under conditions of their continuous operation.

The aim of the invention is to reduce the labor intensity of manufacture and to provide the possibility of reinforcing beams under load.

Figure 1 shows a compartment - a part of a beam bounded by two adjacent vertical stiffeners in which inclined ribs are installed; in fig. 2 - node I in figure 1; on fig.Z the same, with gussets and short ones from the corners; figure 4 - section aa in figure 2,

In the method of attaching inclined stiffeners to steel1 (beam, inclined stiffening ribs 1 are attached to the gussets 2 adjacent to the wall 3 of the beam by means of welds 4. The ribs 1 are fixed to the wall of the girder 5, and the gaps 2 to beams 6 itself and vertical stiffening ribs 7 - by means of welds 8.

The inclined stiffening ribs 1 are made shorter than the diagonal of the compartment, made of sheet or strip coBoii steel and make cutouts 9 under the gaps 2 at both ends. These cutouts ensure that the edges fit tightly to the gaps 2 and the wall 3 of the beam at the same time , as well as with the free installation of gussets in the design position. Inclined stiffeners are connected to the bevets 2 by means of welds 4. To reduce the effect of welding in the reinforcement process, the attachment of the inclined ribs 1 to the wall 3 is accomplished with the help of talons 5. Beams 2 are connected to the beams 6 themselves and vertical stiffeners 7 by weld seams 8. I

The attachment of the 10 pieces to 6 itself, and the short 1 1 to the wall 3 can be made with the help of bolts. In this case, they are made of rolled angular steel. The bolt holes in the corner beads are oval to ensure that the bevels can move in the transverse direction relative to the longitudinal axis.

beams direction.

The constructive dimensions of the gables, the length of the welds and the number of bolts for fastening the reinforcement elements are determined on the basis of

efforts arising in inclined stiffening ribs. The step is assigned according to the condition of ensuring the stability of the ribs between the anchorage points.

The method of attachment (JiacoHOK to by itself and the edges to the wall allows to minimize undesirable beam deformations in the process of strengthening under load, to reduce the laboriousness of work on

strengthening due to the simplicity of fixing the assembly into the design position and at the expense of Toj o, which does not require an individual fit of the ribs at the place of fit,

installations

Claims (1)

Invention Formula The method of attaching inclined stiffeners to a steel beam containing ca, wall and vertical stiffeners, including the manufacture, placement and attachment of sloping stiffeners to the wall, along the vertical and beams of the beam, characterized in that, in order to reduce the labor intensity of manufacture and to enable the beam to be strengthened under load, inclined stiffening ribs are performed less lengths than the diagonal length of the compartment, and on opposite sides of the rib, perpendicular to it, is attached short, and at the ends of the inclined stiffener on the side of the edges adjacent to the wall of the beam, cutouts for the gouges are made, then inclined stiffening ribs are mounted close to the wall of the beam and the torsion bars are attached to the wall in welding or on bolts, and at the points of attachment of the inclined edge to the beams themselves, rectangular gussets are installed and attached to the inclined edge and the corresponding vertical edges and by themselves.