A Performance Evaluation of Seismic Retrofit of Existing Greece Building

Abstract

A seismic retrofit entails modifying existing structures in order to improve the system's performance or to repair or strengthen its components to reach the desired performance. In order to arrive at an appropriate retrofitting scheme, the structure's vulnerability and a detailed seismic evaluation are essential, where seismic fragility curves are one of the tools for seismic evaluation. In this study, a 5-storey typical existing Greek building is selected which was designed according to Greek Code. The selected buildings are modelled for nonlinear analysis with and without shear walls. Seismic records are selected, scaled and modified according to Greek Response spectrum. Dynamic time-history analysis is performed. Inter-story drift is considered as damage parameter and fragility curves are developed for various performance levels. This holistic approach contributes to the broader understanding of seismic retrofitting methodologies and their applicability to existing structures, particularly those designed under specific regional codes such as the Greek Code. The result shows that there are significant improvements after retrofitting the building using shear walls.