Experimental and numerical investigation of T-joint enhanced confinement using flat steel strips

In this present study, an effort has been made to investigate the performance of reinforced concrete (RC) beam-column joints (BC) sub-assemblage using flat strips (FS) as an amended technique for confinement, to enhance the shear capacity of BC sub assemblage in the RC structure. Furthermore, the finite element (FE) model for tested joint assemblage using ANSYS was also carried out to compare the effects of ductility in terms of load-carrying capacity and ultimate load. The assemblage was provided with adequate transverse reinforcement as per ACI-318. The specimens were investigated into two groups. The reference specimen, BC-SS (joint standard stirrups) detailed with conventional stirrups of 10 mm-Ø and modified specimen, BC-FS (detailed by using flat strips). The specimens were tested under vertically monotonic loading to study their behavior at the ultimate limit state (ULS). The results show the significant improvements in the BC-FS specimen referred to in terms of ductility factor, stiffness, and strength. © 2020, Springer Nature Switzerland AG.