RU2718572C2 - Reinforced glued laminated beam - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, namely, to reinforced wood-glass beam. Beam includes stretched reinforcement partially located outside on the side of the lower face of the beam and partially inclined in the beam body and device for fastening and tensioning of the reinforcement. Horizontal reinforcement is located parallel to lower face of beam, and inclined is glued in body of wood. Device for attachment and tensioning of valves in operation is located at joint of horizontal and inclined reinforcement.

EFFECT: technical result consists in increase of bearing capacity and rigidity.

1 cl, 1 dwg

Description

A known design of reinforced glued wooden beams / 1 /.

The closest in technical essence is the reinforcement beam with steel truss in span 121.

However, to strengthen the beam, the overlap or coating is partially dismantled, and then work is carried out to strengthen the steel truss, which requires significant labor and material costs.

The problem is solved in that the stretched reinforcement of the beam is partially located outside, partially glued to the body of wood. In this case, the external reinforcement is parallel to the lower edge of the beam, and glued is located with an angle of inclination in the supporting parts.

To increase the bearing capacity and rigidity during the operation of the beam - at the junction of the inclined reinforcement and horizontal reinforcement (external) parallel to the lower edge of the beam, a embedded part is arranged that allows to tighten (pre-stress) the extended reinforcement.

In FIG. 1. shows a reinforced board-glued beam, consisting of glued wood 1, inclined reinforcement 2, which is glued into the body of wood, horizontal reinforcement 3 located outside, parallel to the lower edge of the beam. The stretched reinforcement is joined to the device for fixing and tensioning the reinforcement 4, which allows it to be tightened with nuts 5. The device for fixing and tensioning the reinforcement is a p-shaped element consisting of two vertical steel strips of one horizontal box-section profile connected at fillet welds . The p-shaped element can be fixed to the beam using capercaillies 6. Metal plates 7 are located at the ends of the beam to prevent them from crushing when tightening the reinforcement. Tightening the tensioned reinforcement to the required force during operation can be done using nuts that are installed on the threaded portion of the reinforcement at the joints and ends of the beam.

To obtain a reinforced board glued beams, it is necessary to make a beam from boards glued with synthetic glue. Then, grooves are arranged in the beam (by drilling or cutting) for the inclined rods. Next, inclined rods are installed in the grooves of wood and glued. The next step is the installation of embedded parts. To do this, holes are drilled in the horizontal box-sectional profile of the p-shaped element for passing threaded parts of the ends of the inclined and horizontal reinforcement. Mortgage p-shaped elements are put on the holes and are attached with the help of grouse to the body of wood. Then, nuts are screwed onto the ends of the inclined rods. After that, horizontal reinforcement with a threaded part at the ends is passed through the holes in the u-shaped element, and fixed in the joint with screw bolts.

For experimental verification, a reinforced board-glued beam is shown (see Fig. 1).

The use of the claimed reinforced board-glued beam with the possibility of prestressing during operation will increase the bearing capacity, rigidity and reduce cost.

Literature

1. Wooden structures: Textbook / A.V. Kalugin. 2nd edition, rev. And additional.-M.: Publishing house ASV, 2008. -288 p.

2. Technical operation and reconstruction of buildings / Textbook: -M: Publishing House of the Association of Building Universities, 2009. -296 p.

Claims (1)

A reinforced board-glued beam, including stretched reinforcement, partially located outside from the side of the lower edge of the beam, partially inclined in the body of the beam, and a device for fixing and tensioning the reinforcement during operation, characterized in that the horizontal reinforcement is parallel to the lower edge of the beam, and the inclined is glued into the beam body, while the device for securing and tensioning the reinforcement is located at the junction of horizontal and inclined reinforcement.

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