RU197463U1 - Glued wood beam - Google Patents

Abstract

Glued wooden beam (1) refers to building structures, namely to flexible wooden structures such as beams, mainly made of glued wood, and can be used in coatings and ceilings of buildings and structures for industrial and civil purposes. Glued wooden beam (1) consists of a package of glued boards (2), interconnected by adhesive seams (3). Packages of glued boards (2) are provided in reinforced joints (3) with reinforcing elements (4) in the form of fiber from a composite material. The reinforcing elements (4) are evenly distributed over the width of the package of glued boards (2) and unevenly over the span and height of the section of the glued wooden beam (1). The technical result is an increase in the bearing capacity and durability of a glued wooden beam. 7 ill.

Description

The utility model relates to building structures, namely to flexible wooden structures such as beams, mainly of glued wood, and can be used in coatings and ceilings of buildings and structures for industrial and civil purposes.

A wooden beam is known, consisting of a package of glued boards and reinforcement glued into it, while in the lower stretched zone of the glued package, horizontal reinforcement with bends at support zones is installed, and horizontal reinforcement with breaks at the support zones in sections passing through inflection points of the reinforcement of the stretched zone (RU 117474, Е04С 3/14, June 27, 2012).

The disadvantage of the technical solution is the low durability associated with the corrosion wear of the metal reinforcing bars, as well as the increased laboriousness of manufacture, due to the grooves in the components of the beam and the exact matching of the configuration of the steel reinforcing bars having bends with the position of the grooves intended for their gluing.

Known wooden beam, including a package of glued boards and metal reinforcement, which is made in the form of paired frames of the upper and lower longitudinal and inclined rods attached to the side surfaces of the package of glued boards with C-shaped toothed strips having teeth in the area adjacent to the side surfaces of the glued package boards and holes on the horizontal planes in which the pins are installed, while the C-shaped gear strips have a variable width that increases from the middle of the wooden beam to its supports in joint in accordance with the diagram of shear stresses in a wooden beam, and a variable step, decreasing from the supports of the wooden beam to its middle in accordance with the diagram of the forces in the upper longitudinal rods. (RU 2633721, Е04С 3/12, Е04С 3/14, 08.24.2016).

The disadvantage of the technical solution is the low durability associated with the corrosion wear of metal reinforcing bars, as well as the high complexity of manufacturing due to the implementation of welded metal frames.

A wooden beam is known, including packages of glued boards with reinforcing elements combined along the length of the tie rods and wooden planks, and longitudinal plates and transverse plates of composite material glued to the inner surfaces of the packages of glued boards are used as reinforcing elements, while the longitudinal plates have a variable thickness along the height of the section and the span of the beam in accordance with the distribution of normal stresses, and the transverse plates have a variable thickness along the span of the beam in in accordance with the distribution of transverse forces (RU 171490, Е04С 3/12, 02.22.2017).

The disadvantage of the technical solution is the low durability associated with the corrosion wear of metal studs, as well as the high complexity of manufacturing due to the presence of additional adhesive seams that attach reinforcing elements to packages of boards, which are additionally combined with studs.

The closest technical solution to the claimed utility model is a glued wooden beam, including packages of glued boards with reinforcing elements of woven nets glued in the manufacture of the beam on the supporting sections between the wooden plates, while the woven nets are glued from the bottom of the lower wooden plate of the glued wooden beam, sequentially bending all the wooden plates from the bottom up, and the rest of the woven nets wrapped around a glued wooden beam, creating a continuous waterproofing layer on supporting beam section (RU 2464386, ЕВВ 1/26, 02/25/2011).

The disadvantage of the technical solution is the low bearing capacity of the beam in the middle of the span, due to the lack of reinforcement in this section, as well as the low durability of the beam due to the wear of the reinforcement on the outer planes of the beam as a result of temperature, mechanical and other influences.

The objective of the utility model is to increase the bearing capacity and durability of a glued wooden beam.

The technical result is achieved by the fact that a glued wooden beam, including a package of glued boards with reinforcing elements, contains fiber from composite material as reinforcing elements, placed in adhesive seams between the boards of the glued package, while the reinforcing elements are placed along the entire height of the package on the supporting section of the beam and in the extreme layers of the glued package in the middle part along the span of the beam.

The essence of the utility model is illustrated by drawings:

- FIG. 1 - wooden beam;

- FIG. 2 - section 1-1;

- FIG. 3-section 2-2;

- FIG. 4 - section 3-3;

- FIG. 5 - diagram of the transverse forces along the span of the beam;

- FIG. 6 - diagram of normal stresses along the height of the beam;

- FIG. 7 - plot of bending moments along the span of the beam.

The glued wooden beam 1 consists of a package of glued boards 2, interconnected by adhesive seams 3. The packages of glued boards 2 are provided in the adhesive seams 3 with reinforcing elements 4 in the form of fibers made of composite material, for example, carbon fiber reinforced plastic or fiberglass. The reinforcing elements 4 are evenly distributed over the width b of the package of glued boards 2 and unevenly over the span L and the height of the section h of the wooden beam 1 (Fig. 1). The reinforcing elements 4 are placed along the entire height of the package of boards 2 on the supporting section of the wooden beam 1 of length L ₁ ≈ 0.15 L (Fig. 2) and in the extreme layers of the glued package of boards 2 in the middle part along the span of the glued wooden beam 1 of length L ₂ ≈ 0.15 L, L ₃ ≈ 0.4 L (Figs. 3, 4).

The reinforcing elements 4 are glued into the package of glued boards 2 in the adhesive seams 3 along the entire length of the glued wooden beam 1, work together with them, which leads to an increase in the bearing capacity of the glued wooden beam 1.

The reinforcing elements 4 are made of composite material, which avoids the corrosive wear of the material and, as a result, increases the durability of the glued wooden beam 1 as a whole.

The reinforcing elements 4 are located inside the glued package of boards 2, protected by adhesive seams 3, which protects the reinforcing elements 4 from high temperatures and solar radiation and, as a result, increases the durability of the glued wooden beam 1.

The reinforcing elements 4 are placed along the entire height of the package of boards 2 on the supporting section of the glued wooden beam 1 of length L ₁ (Fig. 2) - in accordance with the distribution of transverse forces in the beam from the calculated load (Fig. 5), and in the extreme layers of the glued package boards 2 in the middle part along the span of a glued wooden beam 1 of length L ₂ , L ₃ (Fig. 3, 4) - in accordance with the distribution of normal stresses and bending moments in the beam from the action of the calculated load (Fig. 6, 7), which leads to increase the bearing capacity of glued wooden beams 1.

The reinforcing elements 4 of the fiber are placed laying in adhesive joints 3 without additional technological operations, which also reduces the complexity of the glued wooden beam 1, especially compared to the manufacture of analogues.

The dimensions of the cross section of the package of glued boards 2, the material of the adhesive joints 3 and the parameters of the reinforcing elements 4 are determined by calculations.

The proposed glued wooden beam in comparison with the prototype allows to increase the bearing capacity and durability, and in comparison with analogues - the complexity of manufacturing.

Claims (1)

A glued wooden beam, including a package of glued boards with reinforcing elements, characterized in that a fiber made of composite material is used as reinforcing elements, placed in adhesive seams between the boards of the glued package, while the reinforcing elements are placed along the entire height of the package on the support section of the beam and in the extreme layers of the glued package in the middle part along the span of the beam.

Images