GLOBAL PERSPECTIVES ON RC BEAM DESIGN: A COMPARATIVE STUDY OF CONCRETE CONTRIBUTION TO SHEAR STRENGTH ACROSS INTERNATIONAL STANDARDS
DOI:
https://doi.org/10.55766/sujst8140Keywords:
Flyash and Glass Fibres, Metakaolin, Shear Reinforcement, Shear ResistanceAbstract
Concrete and shear reinforcement give Reinforced Concrete (RC) beams their shear resistance. This study analyzes several national regulations and examines how concrete affects the shear strength of RC beams. Three-point loading was tested on six RC beams that were 150 mm wide, 300 mm deep, and 2000 mm long, made of M35 grade concrete. The optimal span of the supports was 1700 mm. The longitudinal reinforcement varied, with B1 to B3 being conventional mixes and B4 to B6 being 10% Metakaolin, 10% Flyash, 80% OPC, and 1.5% glass fiber. Measured experimental shear strengths were compared to the theoretical values found in ACI 318-19, Eurocode 2, and IS 456:2000. According to IS 456:2000, the comparison showed that concrete’s shear strength penetrates its shear resistance. Closer estimates to experimental results were given by codes like ACI 318-19 and Eurocode 2, with Eurocode 2 being the most accurate, as demonstrated by ACI 318-19 and IS 456:2000. According to the study’s findings, IS 456:2000 tends to underestimate shear strength and suggests modifications to lessen reliance on shear reinforcement. These results force researchers and structural engineers to choose appropriate shear strength values for RC beam designs that are both safe and economical.
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