Experimental Investigation of the Effects of Longitudinal and Transverse Reinforcement Diameters on the Flexural Strength of Reinforced Concrete Beams
DOI:
https://doi.org/10.55927/fjst.v5i10.14Keywords:
Experimental, Reinforced Concrete Beams, Crack, Flexural Strength, Rebars Diameters.Abstract
The flexural behavior of reinforced concrete beams is influenced by the characteristics of longitudinal and transverse reinforcement, including reinforcement diameter and stirrup configuration. This study experimentally investigated the flexural strength and deflection of four reinforced concrete beams with different reinforcement configurations. Beams B1 and B2 were reinforced with 12 mm diameter longitudinal reinforcement and 8 mm diameter stirrups, whereas Beams B3 and B4 were reinforced with 13 mm diameter longitudinal reinforcement and 6 mm diameter stirrups. The specimens were subjected to flexural loading to evaluate their structural performance in terms of flexural strength and deflection. The results showed that Beams B1 and B2 achieved flexural strengths of 80.50 MPa, while Beams B3 and B4 exhibited flexural strengths of 71.01 MPa and 52.07 MPa, respectively. Beam B1, reinforced with 8 mm diameter stirrups spaced at 100 mm and arranged at a 90° angle, exhibited a deflection of 100 mm under a load of 85 kN. In comparison, Beam B3, reinforced with 6 mm diameter stirrups arranged at a 90° angle, exhibited a deflection of 75.5 mm under a load of 75 kN. The experimental results indicate that beams reinforced with larger-diameter stirrups exhibited greater measured deflection. The occurrence of diagonal shear cracks indicates the contribution of shear-related mechanisms to the damage development in the reinforced concrete beams. Transverse reinforcement plays an important role in resisting shear forces, controlling diagonal crack propagation, and influencing the progression of damage toward failure
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