ANALYSIS OF THE USE METAL AND NON-METAL REINFORCEMENTS FOR STRENGTHENING WOODEN ELEMENTS AND STRUCTURES

Abstract

Domestic and foreign experience in the use of metallic and non-metallic reinforcement to strengthen load-bearing wooden elements and structures in industrial and civil construction, as well as in engineering structures is analyzed. The main types of metallic and non-metallic fittings and their mechanical characteristics are characterized. A detailed analysis of steel and various types of composite reinforcement (basalt reinforcement BFRP, fiberglass composite reinforcement GFRP, carbon composite reinforcement GFRP, composite reinforcement based on aramid fibers).
 Currently, designers use reinforced steel, usually corrugated reinforcement, of such classes, which has a site of fluidity, to reinforce glued wood elements. Since the strength of reinforcement affects the load-bearing capacity of the reinforced element of wood, it is necessary to take it into account when designing such elements and calculate together. Therefore, it is rational to reinforce wooden elements and structures with the use of steels, the strength and elastic properties of which most fully correspond to the properties of wood.
 There are four types of composite reinforcement: fiberglass reinforcement (with glass fibers); carbon fiber fittings (with carbon fibers); basaltoplastic (with basalt fibers); organoplastic (with artemis fibers); organoplastic (with natural fabrics). The most common of them in construction are carbon, basalt and fiberglass. The main advantages and disadvantages of such types of reinforcement are given. Composite has the following advantages over metal: resistant to temperature changes, increases the service life of the structure, is not exposed to aggressive environments, light weight, durable, non-toxic, can be made of any length.
 In the future, there will be an attempt to use combined reinforcement to strengthen wooden elements and structures.