Journal of Physics: Conference Series | 2021
Numerical investigation of shear reinforcement effects on the flexural behavior of reinforced concrete beams
Abstract
The aim of this article is to study the effects of lateral reinforcement on the flexural behaviour of Straight Reinforced Concrete (RC) Beam by Finite Element Method (FEM). Three-dimensional nonlinear finite element analyses was performed for simply and fixed supported beams utilizing computer program called NFHCBSL, this program incorporates 20-node isoparametric brick element that is used to represent the concrete elements while reinforcing bars are idealized as axial members embedded within the concrete elements without any relative displacement between them. Different flexural reinforcement ratios, stirrups spacing, depth to width ratios (h/b), and shear span to depth ratios (a/h) have been studied. The failure of all specimens is designed to be by flexure. The results have shown that the most increments in ultimate load with increasing shear reinforcement were found for ratios of ρprov./ρmax larger than 80% for h/b less than or equal to 2, while the increments were near to 9% when the stirrups increased by 100%. Also, for h/b is equal to 2.5 the optimal efficiency of stirrups on the ultimate load was at ρprovided/ρmax equal to 43. The increments in the ultimate loads were 20% and 33% when the stirrups increased by 50% and 100% respectively.