RU2709576C1 - Steel wood concrete h-beam - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to construction, specifically to structures of steel wood concrete H-beams. Steel wood concrete H-beam includes top and bottom belts from metal-toothed shells, and wall from glued pack of boards or wood plastic. Upper belt consists of 2 half-shells, which are filled with concrete, lower belt – from shell of solid cross-section. Anchor shells of circular cross-section are formed of two teeth of semi-ring section, which are in contact with wall are pressed into it, and in area of upper belt are dipped in concrete. At lower belt teeth have semicircular section, are bent inside longitudinal edge and are pressed into wall through holes of stamping teeth of middle zone.

EFFECT: technical result consists in improvement of strength and rigidity.

3 cl, 7 dwg

Description

The invention relates to the field of construction, and in particular to structures of beams used as load-bearing elements of floors or coatings of buildings.

Known wooden glued beam, including a glued package of boards, a metal gear plate, a rubber layer and an outer board glued through an adhesive layer (see RF Patent No. 2022109, Е04С 3/18, publ. 30.10.1994).

The disadvantage of a wooden glued beam is the low strength of the connection of the metal gear plate with the outer board, which is provided only by a layer of glue, a large consumption of material on the beam.

Known metal wooden I-beam, including the upper lower belt made of wood with metal plates and a wall from an glued package of boards, where the wooden wall and the belt are interconnected by the teeth of metal plates (see RF Patent No. 157379, ЕСС 3/292, publ. 06.11.2015 )

The disadvantages of the metal-wooden beam is the low strength of the upper belt, the "fluctuation" inherent in wooden beams, the increased consumption of material on the beam.

The closest is a steel-concrete beam, including the upper and lower belts of metal shells, one of which is filled with concrete and a wooden wall connected to the belts by means of anchors stamped from the shells (see RF Patent No. 166399, ЕСС 3/29, publ. November 20, 2016 Bulletin No. 32).

The disadvantages of this steel-concrete beam are: low rigidity and strength of the joint of the upper belt with the wall, deformability due to the expansion of the anchors from the longitudinal axis included in the wooden wall and concrete shelf, smoothness of the beam anchors and increased consumption of materials for the product.

The result is achieved in that in a steel-concrete I-beam, including the upper and lower belts of metal shells, the upper of which is made of two halves and filled with concrete and a wall of an glued package of boards or wood plastic, the upper and lower belts are connected to the wall through a circular anchor metal plates placed along the length of the beam with different steps, which are directed alternately towards the walls and shelves in the middle zone from the longitudinal axis, and the teeth have a semicircular section in the lower belt anes wooden wall in holes through the semi-circular section shells punched holes annular teeth forming the anchor section. To improve joint work with concrete and increase the bearing capacity of the anchors of the upper belt, the anchors are filled with concrete, the metal shell of the upper belt is equipped with reefs. In addition, ruffs are carved in the anchors of the upper and lower shells.

In FIG. 1 shows a fragment of a general view of a steel-concrete I-beam. In FIG. 2 shows a longitudinal section of the beam AA; in FIG. 3 and 7 show fragments of metal-toothed shells of the upper and lower zones, respectively, in FIG. 4, 5, 6 - nodes and types A, B, C, D (composite teeth-anchors).

The steel-wood I-beam includes lower 1 and concrete-filled upper belts with metal-toothed casings 2a and 2b (Fig. 3), wall 3 made of wood plastic. Wall 3 is attached to the belts through metal shells 1 and 2, teeth 5, 6, 7, 8 are stamped in the latter, and teeth 9, 10 of a semicircular section with a step a ₁ a ₂ a ₃ , etc. are stamped in the shell 1, and pressed into the wall of the upper and lower parts. The teeth 6, 8, 10 of a semicircular section passing through the holes of the stamped teeth 5, 7, 9 form an annular section anchor.

Assembling a composite I-beam is performed in the following sequence.

In the factory, first half-shells 2a and 2b are made, in which the teeth of the half-ring section 5, 6, 7, 8 are stamped, in which the "ruffs" 12, 13 are carved. In the half-shell 2b of the upper belt, the stamped teeth of the half-ring section 6 are inserted into the holes from the stamped teeth 5 of the half-shell 2a and connect them with studs 11 of the edges of the teeth; while the teeth of the semicircular section 7 enter the holes from the extrusion of the teeth 8 and also form an anchor of the circular section. In the wall 3, holes are drilled for the size and pitch of the anchors of the upper and lower belts 1 and 2, the anchor of the upper belt 2 is pressed into the wall 3. At the shell of the lower belt 1, the teeth of the semicircular section 9 are inserted into the formed holes from the stamped teeth of the same section 10, forming an anchor of annular cross-section, fill the annular cross-section anchor with quick-hardening plastic 14 and press it into the wall 3. To prepare the beam in this way, the upper belt 2 is monolithic with concrete 4, liquid concrete falling into the circular anchor 5, 6, 7, 8 forms t anchor composite sections 15 and 16.

The assembled steel-concrete I-beam has an increased overall strength and rigidity and the strength of the connection of the belts with the wall, provides a reduction in the material consumption of the beam.

Claims (3)

1. Steel-wood double-tee beam, including the upper and lower belts of metal shells, the upper of which is filled with concrete, and a wooden wall connected to the belts by stamped from the shells of the anchors, characterized in that the shell of the upper belt is made of two halves with an overlap in the zone contact with the beam wall, and the anchor teeth are stamped with a semicircular section. 2. A steel-wood double-tee beam according to claim 1, characterized in that the stamped teeth-anchors of the lower layer of one of the halves of the upper shell, passing through the holes of the stamping of the upper layer of the other half, form round anchors with the upper teeth and are interconnected by carved studs at the edges , and when monopolizing the upper belt is filled with concrete. 3. Steel-concrete I-beam under item 1, characterized in that in the anchors of the upper and lower shells are carved "ruffs" with a point directed from the plane of the shell.

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