Seismic Evaluation of Steel Beams Reinforced with Glass and Carbon Fibres Reinforced Plastics

Today, it has been proven that the development of carbon fibre reinforced plastic (CFRP) and glass fibre reinforced plastic (GFRP) sheets with tensile strength and elastic modulus can increase load transfer on steel beams higher than steel before steel yields. This study was conducted numerically by ABAQUS, which was evaluated after appropriate verification by a parametric in-vitro study the variables. The study results showed that the greatest effect of steel beam reinforcement by FRP fibers was on secondary stiffness, strength and energy absorption, and the effect was insignificant on primary stiffness. Also, the results showed that by reducing the slenderness, strength, primary stiffness and relative energy absorption of the reinforced beam reduced, but the relative ductility increased. In addition, with the bending load on the steel beam, the relative performance of the beam reinforced with CFRP fibers was lower than that of the beam reinforced with GFRP fibers in this study in all samples. results of the relative ductility show that by increasing the slenderness, the relative ductility of the steel beam reinforced with GFRP and CFRP fibers reduces. So that this reduction is for the reinforcement with GFRP fibers with a slope of ۰.۳۳% and is for the reinforcement with CFRP fibers, it happens with a slope of ۰.۴۲%. Also, the relative ductility of the steel beam reinforced with CFRP fibers is higher than the relative energy absorption of the steel beam reinforced with GFRP fibers in all sections.

کلیدواژه ها:

Reinforcement of Steel Beams ، polymer fibers ، GFRP ، CFRP ، Numerical Study