ABSTRACT
FRP bars are made of continuous fibres bonded by impregnating them with matrices, such as epoxy resins and vinyl ester resin. Three main types of fibres are used to produce FRP bars: carbon, aramid and glass. Carbon fibres are made from petroleum or coal pitch and polyacrilic nitril. The stress-strain relationships for FRP bars in tension is linear up to failure by rupture. Values of the tensile strengths, ffu and the moduli of elasticity, Ef of carbon, aramid and glass FRP bars are compared in Table 14.1 with the nominal yield stress and modulus of elasticity of steel reinforcing bars. The values given in the table for FRP are approximate; the mechanical properties depend upon the constituents as well as the manufacturing process; the manufacturers commonly provide the mechanical properties of their products.
