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This research deals with the assessment of the seismic behavior and capacity of a reinforced concrete building in order to examine the possibility of strengthening. This process is achieved by using the Nonlinear Static Analysis (Pushover Analysis) and is based also on performance criteria. In case of damages two different methods of strengthening are implemented: the reinforced concrete jacketing and the carbon fiber reinforced polymer wrapping (CFRP). Afterwards, the determination of the optimum strengthening design is performed, thanks to metaheuristic optimization algorithms, aiming at the minimization of the cost. Subsequently, the retrofitting measures are evaluated through a methodology defined by vulnerability criteria and fragility curves, produced either by the Incremental Dynamic Analysis (IDA) or by using Eurocode8 Regulations, the Method of Coefficients as well as the Hazus Methodology. The fragility curves refer to different earthquake performance levels and as a result they express the probability of excess of the different target damage states. A comparison between these curves, before the intervention and after that, indicates the effectiveness of the selected strengthening techniques.

ASSESMENT OF OPTIMUM STRENGTHENING DESIGN OF A REINFORCED CONCRETE BUILDING WITH VULNERABILITY CRITERIA