The main purposes of this work it to present an experimental campaign of different strengthening strategies of RC columns, and evaluating benefits concerning their structural behaviour cyclic loading. 9 RC columns were tested, two of them original and the rest composed by strengthened columns by CFRP and steel plates jacketing. The aim is, therefore, to contribute for developing and calibration a procedure that enables the evaluation of the efficiency of the strengthening strategies, their possibilities and application. It was also an objective of this work to explore the possibility of use this techniques on the improvement of existing buildings performance