Abstract
Numerical and experimental investigation of reinforced geopolymer concrete (RGPC) beams containing steel fibres with loads placed at different span-to-depth ratios is presented in this study. Analytical investigations on RGPC beams with different load geometries are undertaken using nonlinear finite element analysis. ABAQUS software is employed for general-purpose finite element modelling (FEM) and analysis. The material properties of concrete in compression and tension and steel reinforcement used for modelling are presented. Types of constraints provided for FEA between concrete and steel are explained. The four-point test and finite element analysis have been performed to investigate the mechanical performance of RGPC beam specimens and compare the experimental results with the analytical outcomes. The effect of position loads at various span-to depth ratios on ultimate load, deflection, and crack manners are discussed. The results indicate that the modulus of elasticity and compressive strength of RGPC is improved due to the incorporation of steel fibres. The failure pattern of the RGPC is similar to the conventional concrete. The FEM proves its potential for predicting the behaviour of RGPC beams and the pattern of failure. Furthermore, the experimental findings are found to be in good agreement with the results of the FEM.