Advanced Composite Retrofit of RC Columns and Frames with Prior Damages—Pseudodynamic Finite Element Analyses and Design Approaches

This study develops three-dimensional (3D) finite element (FE) models of composite retrofits in deficient reinforced concrete (RC) columns and frames. The aim is to investigate critical cases RC with inadequate lap splices bars or corroded steel reinforcements the beneficial effects external FRP jacketing avoid their premature failure structural collapse. Similarly, RC-frame FE explore an innovative intervention that includes orthoblock brick infill wall advanced seismic joint made highly deformable polymer at boundary interface frame. experimental validation technique frames presented earlier published papers by authors (as well as for a four-column structure), revealing potential extend contribution infills high displacement ductility levels frames, while exhibiting limited damages. analytical results compare available results. Therefore, this study’s research extends reinforcements, without joints. pseudodynamic analyses reveal different reinforcement detailing columns, lap-spliced may be more detrimental isolated than It seems additional regions are engaged redistribution damage observed. somewhat greater bare all frame considered corroded. Further, prior damages risk collapse receive retrofit achieve higher base shear load original bars, comparable top ductility. Finally, utilized propose modified design equations strength chord rotation deficiencies structures.