The Effectiveness of Retrofitting RC Frames with a Combination of Different Techniques

During the last two decades, attention of researchers has been focused on repairing and retrofitting concrete frames to make them more earthquake-resistant. Two methods have developed increase seismic resistance previously undamaged structures before they are subjected an earthquake. The first is through addition new structural members, such as steel braces second by selectively strengthening elements, for instance caging. Seismic response analysis results utilized in multi-story RC that were designed without design criteria. This study aims determine whether technique effective based comparisons between braces, cages, their combinations. performance defined code Algeria RPA 2003 according latest recommendations. Static nonlinear was used compare responses existing non-ductile reinforced under a variety retrofit schemes. show with caging gives excellent terms ductility low shear capacity. bracing increased capacity but led severe deficiency. structure combined shows good ductility. Using Zipper system (steel bracing) V combination similar model.