Akademik Veri Yönetim Sistemi
ENGINEERING FAILURE ANALYSIS, cilt.185, 2026 (SCI-Expanded, Scopus)
It is important to RC concrete structures with environmentally friendly and sustainable materials in order to both reduce environmental pollution caused by waste and increase structural performance. Geopolymer concrete (GC) has recently become the focus of researchers as an alternative to Portland cement, which has high-carbon emissions. However, there is a gap in the literature in the use of GC technology, especially in the strengthening of RC beams. The aim of this study is to use of 50 mm thick GC layer, an innovative and sustainable concrete type, in the strengthening of damaged RC beams. For this purpose, the shear performance of damaged RC beams repaired using 50 mm thick layers produced with one glass FRP and four different GC components (GC, glass fiber GC, hybrid fiber GC and carbon mesh reinforced GC) and five different strengthening configurations (at the bottom, bottom and top, U-shaped, hollow and maximum moment region) were experimentally investigated. This study makes a significant contribution to the existing literature by examining the effect of 50 mm thick GC layers with different fiber and mesh reinforcements on the strengthening performance of damaged RC beams with a holistic approach, both experimentally and analytically. Three-point bending tests were applied to determine the load carrying capacity, load-deflection curves, failure mode, crack distribution, ductility and energy dissipation capacity of three reference and 25 repaired RC beams. Moreover, an analytical model was developed to predict the load carrying capacity of the repaired damaged RC beams. Test results showed that the load carrying capacity and energy dissipation capacity of RC beams strengthened with layers increased by 45 %-90 % and 50 %- 100 %, respectively. The highest load-bearing capacity was achieved in layers produced from carbon mesh reinforced GC and hollow-shaped wrapping reinforcement. In light of the information obtained at the end of the study, it was concluded that GC layers will be an environmentally friendly alternative to traditional reinforcement methods and will constitute an important resource for future field applications and large-scale studies.