The aim of this master thesis is the safety assessment of an existing multistory building and the examination of different reinforcing scenarios of its concrete frame. The building studied is a six storey residential building in Amathounta area in the city of Limassol, Cyprus. The structure was built in 1980. It is constructed from reinforced concrete according to the early Cyprus National Codes as has already been pointed out.

Linear and nonlinear analyses were used for the capacity assessment of the construction. These two different techniques were compared giving an insight to the pros and cons of each method. In this thesis linear methods that were applied to the structure are analyzed. Modal analysis results, modal response spectrum and linear time history analysis methods are presented. The results from each technique are compared in order to acquire the differences among the analysis methods.

Moreover the current study deals with the evaluation of reinforced concrete buildings using inelastic method (Pushover analysis). Capacity curve, which is load-deformation plot, is the output of pushover analysis. As, pushover analysis is non-linear static analysis, so the load-deformation curve can be obtained from Sap2000. It is software which is used to perform the non-linear static pushover analysis.  The analysis of the structure showed the need for additional reinforcements to the original concrete frame, in order to improve its seismic behavior.