Torsion behavior of self-compacting reinforced concrete beams produced from recycled aggregate: a numerical investigation

In the study of reinforcement beams, the behavior of reinforcing beams under torsion is challenging.The use of numerical approaches has been extensive for this purpose, particularly in relation to experimental research, which is usually associated with costs as well as very significant difficulties.This study aims to investigate the torsional moment behavior of the properties of concrete beams, where beams are tested by subjection to torsional moments that come from the eccentricity of the applied load.The experimental 12 self-compacted reinforcement beams models adopted for analysis in this study are tested, all beams are geometrically similar, have a rectangular cross-section with dimensions of (200x250) mm2 with 1000 mm length, within parameters considered include the recycled aggregate concrete (RCA) content, (0,25,50 and 75 %), The amount of longitudinal reinforcement and the number of stirrups.An investigation was conducted to evaluate the convenience and efficacy of utilizing ANSYS software for modeling and performing nonlinear analysis on reinforced concrete beams subjected to pure torsion.The fracture threshold of each specimen was reached by applying a monotonic force.The identical specimens were additionally examined utilizing the methodology proposed by ACI318 to determine their torsional capabilities.Where the application of FEM analysis allows for the assessment of cracking and fracture torques with a high level of accuracy.The torsional capacity achieved with this method was superior in precision compared to the method described in ACI318.Also, the torsional cracking morphology and the crack propagation trend were properly predicted through to the point of the crack.