Numerical Investigations of GFRC beams strengthened in shear with innovative techniques

This paper discusses the Finite Element analysis (FE) conducted to predict behavior of Glass Fiber Reinforced Concrete (GFRC) beams without shear reinforcement (stirrups) and strengthen them with proposed techniques increase their strength. for this study, A total eighteen (18) (120 * 300 2200 mm) specimens were modeled using Ansys™ mechanical. The main variables percentage discrete glass fiber in concrete (0.0, 0.6, 1.2%), type reinforcing bars (steel or GFRP), strengthening material (GFRP steel) links, systems (side near-surface mounted (SNSM) bars, externally bonded (EB) sheet, both), various NSM GFRP configurations full wrapped stirrups, side C-shaped bent bars), link spacing, inclination angle, number bars. Each model had a free span 2000 mm constant span-to-depth ratio (a/d) 2.0. numerical models verified against experimental results presented earlier publication. These analyzed investigate effect on Increasing R.C beam 0.6 1.2% enhanced ductility strength by 24% 32% steel 16% 29% reinforcement, respectively. use instead as slightly but decreased stiffness. capacity up 115%. new technique (SNSM strips) produced better improvements terms capacity, ductility, crack propagation compared other techniques. Numerical analyses considered, between is equivalent factor 0.96 1.04.