Abstract
The technical-and-economic efficiency of wood structures can be implemented by their longitudinal, transverse or combined reinforcement. Both metal and composites made of high-strength fibers (glass, carbon, aramid, basalt, etc) can be used as reinforcing materials. Schemes of reinforcement of wood and wood-glued structures by composite materials are described. The rational geometry of twisted composite reinforcement is proposed, which provides high adhesion to wood material. A method for determining the calculated resistance of a twisted bar to pulling out of wood is given. When calculating the holding force of the calculated pull-out resistance should take into account both the friction force at the contact boundary and the force of crushing the wood under the surfaces of the helical line. It makes possible to increase strength, rigidity, as well as the operational characteristics of wood structures, including load-bearing capacity, durability and reliability in chemically aggressive environments.
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