ABSTRACT
Linear dynamic analysis and non-linear static analysis were performed on a reinforced concrete Gravity Load Design frame built in 1937. Before structural analyses, an in-situ investigation campaign was planned and, then, carried out for both verifying the correspondence between original design documents and true realization and obtaining information on materials. During 20th century, usually reinforced concrete buildings were designed only considering gravity loads, and no horizontal seismic forces. The seismic assessment of these structures according to current seismic design practices depends on available information and, therefore, on the value of the confidence factor (CF). Different structural analyses are allowable according CF value. The structural safety assessment and the seismic response of existing reinforced concrete buildings gravity load designed are a key topic in the appraisal of the Italian seismic hazard. A great variability and quantity of parameters characterise these type of structures, and, therefore, the type of performed structural analysis can strongly affect the final structural safety level.
