Effect of the FRP elastic modulus on the strength and deformation properties of RC structures
Abstract
Effect of the FRP elastic modulus on the strength and deformation properties of RC structures
Incoming article date: 05.12.2019The strength, deformability and width of the opening of normal cracks of prototypes 220, section 12.5x25 (h) cm, reinforced with composite canvases and laminates of different cross-sectional areas, made on the basis of glass and carbon plastics, are compared. The samples had working reinforcement, represented by 2Ø14А600, transverse - with double-section clamps Ø5В500, installed with a pitch of 100 mm. Samples were loaded with two concentrated forces applied in thirds of the span. With composite reinforcement, the appearance of the external composite reinforcement was varied, as well as the presence or absence of U-shaped anchoring clamps glued to the supporting sections of the beams. It has been established that the greatest reinforcing effect is provided by composite materials based on carbon fibers, in which the modulus of elasticity is comparable to the modulus of elasticity of steel.
Keywords: concrete, reinforced concrete, bending element, composite, fiberglass, carbon fiber, strength, deformability