sismic upgrading strategies for non-ductile R/C structures

this study investigates the effectiveness of different strategies for the seismic retrofitting of a gravity -load-designed plan -wise irregular R/C building tested at the JRC elsa laboratory . An alternative retrofitting intervention based on both FRP wrapping and R/C jacketing applied to selected criticla columns was proposed . the retrofitting strategy was focused on two main objectives: relocating the centre of stiffness and strength in order to reduce the torsional component of the response of the structure, increasing the local deformation capacity of columns and thus the global deformation capacity of the structure nonlinear dynamic time history analyses and simplified procedures based on nonlinear static pushover analyses were carried out and comparison with the retrofitting interventions carried out at the JRC ELSA laboratory were performed.