RU2464386C1 - Glued laminated beam - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: glued laminated beam comprises wooden plates and woven nets in quantity equal to quantity of supports in a glued laminated beam. Woven nets are laid in glued layers, from the lower face of the lower wooden plate, serially embracing all wooden plates bottom-up, and the remaining part of woven nets is wrapped around the glued laminated beam. Woven nets are glued between wooden plates by a width equal to 1/4-1/5 from the total length of the glued laminated beam, at the same time the total length of the glued laminated beam is calculated in accordance with the following formula: L=2h+2b+nb, where h - height of glued laminated beam section, b - width of section of glued laminated beam, n - quantity of glued layers along height of glued laminated beam section.

EFFECT: increased chipping strength of a beam and higher durability of a beam due to corrosion protection of support sections.

2 dwg

Description

The invention relates to construction and can be used as load-bearing wooden structures of beam type.

A wooden beam is known (see USSR author's certificate No. 540020, published 03.03.77) containing reinforcing elements made in the form of triangular prisms, an angle of 30-60 ° is formed between the plane of contact of the beam with the beam and the direction of its fibers.

A glued wooden beam is known (see USSR author's certificate No. 808627, published on 02.28.81), including plates assembled in a package, between which adhesive layers and overlays are attached, attached to the side surface at the ends of the beam. The plates are mounted vertically in the cross section of the beam, and the lining is made in the form of plates having a variable length, decreasing to the supporting ends of the beam.

A glued wooden beam is known (see USSR author's certificate No. 989010, published January 15, 83), containing horizontally arranged plates arranged in a bag, between which adhesive layers and reinforcing elements of support zones attached to the side faces are placed. The reinforcing elements are made in the form of corrugated sheets with horizontal perforated sections, each of which is placed between the plates in the adhesive layer.

A glued wooden beam was adopted as a prototype (see USSR author's certificate No. 989009, published January 15, 83), including wooden plates vertically mounted in the cross section of the beam, between which adhesive layers were placed, and reinforcing elements in the supporting areas of the beam having a variable length , each reinforcing element is placed in the corresponding adhesive layer between the plates and is made in the form of a woven mesh, the rods of which are oriented in the direction of action of the main compressive and tensile stresses.

The disadvantage of the prototype is the inability to protect the supporting sections of the beam from corrosion without additional structural measures.

The technical result is an increase in the shear strength of the beam and an increase in the durability of the beam due to the protection of the supporting sections against corrosion.

The technical result is achieved by the fact that in the construction of the glued wooden beam, woven nets are used in an amount equal to the number of beam supports glued in the manufacture of the beam on the supporting sections between the wooden plates.

A feature of the invention is that woven nets are glued to a width equal to 1 / 4-1 / 5 of the length of the glued wooden beam, and the total length of the glued wooden beam is calculated by the formula:

L = 2h + 2b + nb,

where h is the height of the section of glued wooden beams,

b is the width of the section of glued wooden beams,

n is the number of adhesive layers along the height of the section of the glued wooden beam,

while the woven nets are glued to the supporting section of the beam 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 remaining part of the woven mesh is wrapped around the glued wooden beam, creating a continuous waterproofing layer on the supporting section of the beam.

In comparison with the prototype, where additional structural measures are required to protect the supporting sections of the glued wooden beam from corrosion, in the proposed solution, the woven mesh sequentially bends around all wooden plates and covers the section of the glued wooden beam as a whole, creating a closed waterproofing layer that protects the supporting sections of the beam from corrosion .

The invention is illustrated graphically.

Figure 1 shows a General view of the beam in the variant of free support on two supports, figure 2 is a transverse section of the supporting section of the beam 1-1.

The glued wooden beam (Figs. 1, 2) consists of wooden plates 1 and woven nets 2 in an amount equal to the number of supports of the glued wooden beam laid in the adhesive layers 3 from the lower layer of the lower wooden plate, sequentially bending all the wooden plates 1 from bottom to top and the rest of the woven nets 2 is wrapped around a glued wooden beam. Woven mesh 2 is glued between the wooden plates 1 to a width equal to 1 / 4-1 / 5 of the total length of the glued wooden beam, while the total length of the glued wooden beam is calculated by the formula:

L = 2h + 2b + nb,

where h is the height of the section of glued wooden beams,

b is the width of the section of glued wooden beams,

n is the number of adhesive layers along the height of the section of the glued wooden beam.

Claims (1)

Glued wooden beam, consisting of wooden plates and woven nets, characterized in that woven nets in an amount equal to the number of supports of the glued wooden beam are laid from the lower layer of the lower wooden plate, sequentially bending all the wooden plates from the bottom up, and the remaining part of the woven mesh around the glued wooden beam to a width equal to 1 / 4-1 / 5 of the total length of the glued wooden beam, while the total length of the glued wooden beam is calculated by the formula
L = 2h + 2b + nb,
where h is the height of the section of glued wooden beams;
b is the width of the section of glued wooden beams;
n is the number of adhesive layers along the height of the section of the glued wooden beam.

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