Experimental and Numerical Study of Eco-Friendly Corbels Under Static Loading

Abstract

Corbels are structural members that are often used to support and carry main beams. Failure of such members causes disaster failure and a complete collapse structure. Therefore, attention should be given to such members in terms of design, contention and maintenance to ensure their satisfaction with strength and serviceability requirements. This study put forward practical and programmatically investigation on response and failure mode of recycled concrete aggregate (RA) reinforced concrete (RC) corbels. Four samples test and cast using four replacement ratios of recycled concrete aggregate which are 0%, 35%, 65%, and 100%. All RC corbels are designed using the STM suggested by ACI 318-19 code and loaded using (a/d) = 0.6 up to failure. Failure modes, crack patterns recorded and monitored thoroughly during the tests. Experimental results have shown that for all RC samples increasing the percentage RA reduces the maximum bearing and corresponding displacement of corbels significantly with accelerating the shear cracking. However, all corbels experienced same shear crack patterns which started from the supports towards to the column. The results showed that the maximum reductions in maximum load when the replacement ratio changes from 0% to 100% are 24.03%. Also, the maximum reductions in corresponding displacement are (39.61%). On the other hand, the study showed the possibility of using the ABAQUS/standard 2019 program in modeling corbels cast with recycle concrete aggregate with maximum difference in the maximum shear capacity between the numerical simulation and experimental results in 2.92%.