Osama Amer
Hany el-Kady
Ahmed Hassan Ali
Hesham Ahmed Haggag
Ashraf Shawky
Abstract
Using Glass fiber-reinforced polymer (GFRP) bars as a replacement for conventional steel bars is one of the most potential solutions to steel-corrosion-related problems in concrete. Their durability and high strength-to-weight ratio make them a cost-effective and applicable alternative to conventional steel bars. This study investigates the characteristic behavior of concrete shear walls reinforced with steel, GFRP, and a hybrid scheme of steel and GFRP bars under seismic loading. Six full-scale RC shear walls with an aspect ratio of 3.25 were tested under pseudo-static reversed-cyclic lateral load to investigate the potential of a hybrid reinforcement scheme of steel-GFRP to improve the seismic behavior of slender RC shear walls. The overall performance of each tested wall was characterized by investigating the hysteretic response, crack propagation, lateral load capacity, and energy dissipation behavior.
Furthermore, the effects of the GFRP web reinforcement ratio on different behavioral aspects are also investigated. The results indicated that the GFRP-reinforced concrete cantilever walls had an elastic behavior with recoverable deformation up to more than 80% of its ultimate lateral strength. A considerable enhancement in the self-centering capacity of hybrid GFRP-steel reinforced walls was observed, which helped to mitigate the experienced concrete damage. Moreover, higher displacement capacity, increased lateral strength, and equivalent viscous damping coefficient were attained with the GFRP web reinforcement ratio.
Keywords
Hysteretic behaviour, Reinforced concrete,
Shear walls,
Equivalent viscous damping,
Seismic Performance,
Cyclic load
