COMPATIBILITY OF REINFORCEMENT AND WOOD IN BEAMS WORKING ON TRANSVERSE BENDING

Abstract

One of the ways to eliminate the negative shortcomings of wood (dependence of its properties on the structure, defects, the need for use and significant consumption of quality lumber, excessive mass of sections, creep under prolonged load, etc.) and increase technical and economic efficiency is reinforcement of solid and glued trees, steel or composite plastic fittings. This allows you to significantly reduce wood costs, reduce installation weight, improve the quality and reliability of wooden structures that work mainly on the bend.
 The expediency of reinforcing elements of solid or glued wood with steel and composite polymer reinforcement is substantiated. The rather high compatibility of wood work in the compressed and stretched zones of the bending element of steel reinforcing steel of classes A400C, A500C and composite fiberglass reinforcement, composite basalt reinforcement and composite carbon tape is shown. Reinforcement of solid and glued cross-sectional elements of wooden structures with steel or composite plastic reinforcement or tape can significantly reduce wood costs, reduce height and installation weight, improve quality and reliability.
 Analysis of the current state of research of reinforced wooden structures indicates the need for a thorough study of the bending of wooden beam elements with combined reinforcement of steel and composite reinforcement and with combined pre-stressed reinforcement. To date, the issue of studying the stress-strain state of reinforced wood in the "calculated cross section" of both the structure and the work of the material in its composition is insufficiently covered. The use of reinforced wood in structures is not regulated by most countries, so there is no general theory of calculation of reinforced wood structures, which would be based on sound clear hypotheses and assumptions and would be based on the basic principles of solid mechanics.