The five-storey (residential) concrete building was constructed in the mid-1980s. The structural system consists of reinforced concrete frames and few lightly-reinforced concrete walls.

Evaluation and Seismic Retrofit of the existing building as well as the Addition of a new steel floor were designed by EBLECTON according to the recent (2012) Greek Code for Structural Interventions and the relevant part 3 of Eurocode 8.

Aiming the normal knowledge level of the building and the material properties (geometry, reinforcement and detailing, strength, etc.) the available information was supplemented by material tests and assessments.

Nonlinear methods of Analysis (mainly of pushover type) were performed and the below retrofitting techniques were designed via optimization:

• CFRP-wrapping
• Steel-bracing
• Column to shear-wall conversion
• Foundation strengthening