To the issue of strengthening of existing timber structures with composite materials
Abstract
To the issue of strengthening of existing timber structures with composite materials
Incoming article date: 22.02.2022The use of composite materials based on epoxy matrix and carbon or glass fibers for strengthening of existing timber structures of buildings is analyzed. Main benefits and limitations of composite materials are discussed. High tensile strength and stiffness, light weight, corrosion and chemical resistance and relative ease of application without changing the static scheme of structures or stopping exploitation makes fiber reinforced polymers (FRP) suitable for strengthening of timber structures, including those in cultural heritage buildings. Application of FRP in the tension zone of elements under bending helps to arrest crack opening caused by defects and to better exploit the plastic compressive behavior of wood. The use of FRP is limited by their cost, low thermal resistance and limited research and normative documents base. Concluded that further study of materials properties, behaviour of strengthened elements under different types of loading, strength and durability of a bonded joint under different temperature and moisture conditions is required.
Keywords: external strengthening, timber structure, wood, composite, lamella, reconstruction, fiberglass, carbon fiber, reinforcement, epoxy resin