RU2763279C1 - Elements connection joint of wooden and metal-wood structures - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and can be used when connecting wooden elements in lattice flat and spatial structures. The specified effect is achieved by the fact that in the junction of elements of wooden and metal-wood structures, including a wooden belt and a lattice element, the wooden belt is equipped with a steel flat rod with a gusset recessed into a blind groove with a hole and is rigidly fixed in it, and in a steel flat rod a special bolt is inserted through the through hole in the wooden belt, and a bracket is attached to the special bolt, which can be made from a corner for attaching the purlin.

EFFECT: elimination of brittle fracture of the connection, increasing operational reliability, reducing the labor intensity of the installation in the design position of the glued flat steel bar, reducing the material consumption for fastening the girders.

1 cl, 6 dwg

Description

The invention relates to the field of construction and can be used when connecting wooden elements in lattice flat and spatial structures.

Known knot pairing brace with the upper chord of a wooden truss, including the upper chord of the farm, blind groove, glued steel flat rod with a gusset, brace with a glued flat rod (Numerical studies of knots of all-wood trusses on steel glued flat rods / I.I. Lissitzky, V. I. Zhadanov // Bulletin of PSTU - Yoshkar-Ola, 2020. - No. 4. - P. 64-77). Such a connection is capable of receiving, redistributing and transmitting tensile and compressive forces and is applicable in lattice flat and spatial structures.

The disadvantage of this node is the possibility of its brittle fracture from chipping wood (inherent in adhesive bonding of wooden structures as a rigid class), the complexity of installation in the design position when gluing a steel flat rod, as well as the need for additional fasteners in the presence of girders (in the case of the upper belt of truss structures) .

EFFECT: exclusion of brittle fracture of the connection, increase in operational reliability, reduction of labor intensity of installation of a glued steel flat rod in the design position, reduction of material consumption for fastening the girders.

The specified technical result is achieved by the fact that in the junction of elements of wooden and metal-wood structures, including a wooden belt and a lattice element, the wooden belt is equipped with a steel flat rod with a gusset, recessed into a blind groove with a hole and rigidly fixed in it, and inserted into the steel flat rod a special bolt passing through a through hole in a wooden belt and a bracket is attached to a special bolt, which can be made from a corner for attaching a girder.

The node for connecting elements of wooden and metal-wood structures includes: a wooden belt 1, a blind groove 2 with a hole (holes) 3, located in a wooden belt 1, a steel flat rod 4 with holes 5, a T-shaped groove (slots) 6 and a gusset 7 with a hole 8 and with a special bolt (bolts) 9 inserted with a head 10 with grooves 11 into the T-shaped groove 6 and installed in a blind groove 2 with holes 3, a lattice element 12 with an eyelet 13 with holes 14, a bracket 15, a washer 16, a nut ( nuts) 17, run 18, bolt 19, nut 20.

In FIG. 1 shows an element-by-element set of a joint for connecting elements of wooden and metal-wood structures (an option with one special bolt) and a special bolt;

in fig. 2 shows an element-by-element set of a joint for connecting elements of wooden and metal-wood structures (an option with two special bolts) and a special bolt;

in fig. 3 - three-dimensional image of an element-by-element set of a joint for connecting elements of wooden and metal-wood structures (option with one special bolt);

in fig. 4 - three-dimensional image of a piece-by-piece set of a joint for connecting elements of wooden and metal-wood structures (option with two special bolts);

in fig. 5 shows the assembled assembly of elements of wooden and metal-wood structures (option with one special bolt);

in fig. 6 shows the assembled assembly of elements of wooden and metal-wood structures (option with two special bolts).

Assembly order: A special bolt (bolts) 9 is inserted into the T-shaped groove (slots) 6 of the steel flat rod 4 and is mounted with grooves 11 in the head 10 on the body of the steel flat rod 4. The connected structure is installed in the groove 2 with a hole (s) 3 such so that the special bolt(s) 9 pass through the hole(s) 3 through the wooden belt 1. Then the gaps between the walls of the groove 2 and the steel flat rod 4 for rigid fixation are filled, for example, with an epoxy adhesive composition. Holes 5 in the steel flat rod 4 are needed to improve the adhesion of the adhesive to the steel flat rod 4. A washer 16 or bracket 15 is installed on the part of the special bolt (bolts) 9 protruding above the edge of the wooden belt 1 (if necessary, the device for fastening the run 18) and tightened with a nut ( nuts) 17. The lattice element 12 is installed in the design position on the gusset 7 by aligning the axes of the holes 14 in the eye 13 and the hole 8 in the gusset 7. Bolt 19 is installed in the aligned hole, onto which the nut 20 is screwed. in the traditional way (self-tapping screws, bolts, etc.)

The node for connecting elements of wooden and metal-wood structures works as follows.

The force from the lattice element 12 through the lug 13 is transmitted to the bolt 19 installed in the aligned holes 14 and the hole 8. From the bolt 19 the force is transmitted to the gusset 7 and is distributed along its length. From the gusset 7, the force is transmitted to the glued part of the steel flat rod 4, then to the wooden belt 1. Holes 5 in the steel flat rod 4 are needed to increase the adhesion of the adhesive to the steel flat rod 4. Special bolt (bolts) 9, in case of brittle fracture of the adhesive joint , perceives the force and transfers it to the nut (nuts 17). From the nut (nuts) 17, the force is transmitted to the washer 16 or to the bracket 15 (if there is a run 18). Washer 16 or bracket 15 distributes the received force and transfers it to wooden belt 1. Bracket 15 is needed if runs are installed along the upper belt of the truss structure.

The proposed connection design can be used in the design of joints and ensures the operability of the structure under complex types of stress-strain state.

Thus, in comparison with the prototype, the inventive node for connecting elements of wooden and metal-wood structures, while reducing the complexity of installing a glued steel flat rod in the design position, eliminates brittle fracture of the connection, increases operational reliability, and reduces the consumption of materials for fastening runs.

Claims (1)

A node for connecting elements of wooden and metal-wood structures, including a wooden belt with a blind groove, a steel flat rod glued into it with a gusset for attaching a lattice element, characterized in that the steel flat rod glued into the wooden belt is equipped with at least one bolt, which is inserted into the The T-shaped groove in the steel flat rod is fitted with grooves on the body of the steel flat rod, and the other end is inserted into the corresponding at least one hole located in the wooden belt.

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