Performance of Steel Bar Lap Splices at the Base of Seismic Resistant Reinforced Concrete Columns Retrofitted with FRPs—3D Finite Element Analysis

This paper examines analytically the design criteria for composite retrofit of reinforced concrete (RC) columns with a short lap splice length steel rebars inside critical region. The advanced potential pseudo-dynamic three-dimensional (3D) finite element (FE) modelling is utilized to investigate parameters required carbon fiber-reinforced polymer (FRP) jacketing RC rectangular cross-section based on experimental lateral force-to-drift envelope behavior characteristic cases from international literature. satisfactory analytical reproduction results allows systematic numerical investigation developed stress along length. maximum force and horizontal displacement ductility column, as well tensile axial longitudinal bars, their variation lap, bar yielding, plastic hinge variation, are considered determine seismic columns. For first time, smooth slip together delayed yielding or without identified that may be recorded through “ductile” P-d response. Such pseudo-ductile response revisited suitably revised redesign adequate FRP jacketing.