Research of work of i-bearing wooden beams with osb wall

Abstract

New types of beams manufactured by private entrepreneur S. Derkach are presented for testing with Milushi of Lutsk district beam belts are made of wooden bars of the second grade pine; the beam wall is a component made of oriented strand board; a pair of walls with belts is made with an adhesive connection.

The modern development of construction is characterized by the desire to reduce the own weight of structures and increase their thermal characteristics. This has led to the revival of the domestic construction market structures, using wood and waste from its processing. Previously developed provisions for the calculation and design of such structures require experimental confirmation. The well-known design of I-beams with a flat wall, which has become widely used in construction, in recent years has undergone significant changes - the wall, which was previously made of plywood, is made of oriented strand board (OSB). Since the strength and deformability characteristics of plywood and OSB have significant differences, it is necessary to conduct experimental studies of their behavior under load in order to install such beams for the production of design loads for their application in construction.

I-beams - a structural material used for the construction of houses on frame technology, installation of floors, roofing and attics. The formula "wood + OSB + wood" allows to avoid the shortcomings inherent in wood, and thanks to the I-beam section high characteristics of durability are reached.

Studies have shown satisfactory performance of wooden beams of I-beam section with walls of oriented strand board. The load-bearing capacity of the beams exceeded the calculated destructive load, calculated theoretically by 55%. The accepted geometric parameters of the cross section of the beam are optimized for a span of 4.5 m, as in this case the bearing capacity of the beam in different design cases is approximately the same. According to the calculation, this beam with a span of 4 m can withstand a distributed load of 100 kg per 1 r.m.