Enhancing the Performance of Knee Beam–Column Joint Using Hybrid Fibers Reinforced Concrete

Abstract The knee beam–column joint is a critical location in Reinforced Concrete (RC) structure particularly when subjected to earthquake vibrations. current structural design codes dictate the use of high amounts steel reinforcements frame manage large strain demands seismic-prone regions. However, these could result congestion limited area which can consequently produce numerous construction complications. This study aims improve performance Knee Joint (KJ) by reducing load induced embedded during seismic Hence, this attempted develop Hybrid Fiber (HyFRC) combining multiple synthetic fibers be introduced onto KJ. Six KJ specimens were cast using five developed HyFRC materials and one Control specimen experimentally tested under lateral cyclic loading. results indicated significant improvements for energy dissipation capacity, stiffness degradation rate, displacement ductility toughness, reinforcement hysteretic behavior. A total six Finite Element (FE) models verify from experimental testing. accuracy proposed FE resulted average percentage differences 25.89% peak load, 3.45% 0.18% maximum displacements data. In conclusion, that are beneficial providing cost-efficient alternatives structures areas with low moderate level risks.