Analisi speditive per la valutazione sismica di edifici esistenti in calcestruzzo armato e muratura. Il metodo Adriseismic = Expeditious analyses for the seismic assessment of existing reinforced concrete and masonry buildings. The Adriseismic method

The paper describes two parallel expeditious methodologies for the seismic assessment of existing buildings, one dedicated to reinforced concrete structures and the other one to masonry structures. The proposed methods were defined within the Adriseismic project, based on the preliminary surveys and analyses conducted in the countries participating in the program (Italy, Croatia, Serbia, Slovenia, Albania and Greece). The two methods aim at assessing buildings in a qualitative way, while maintaining an international approach, which allows their application also on different areas. Both methods are implemented on spreadsheets and have a similar configuration: starting from general input data, they arrive at the definition of the structural response index, intended as the inverse of vulnerability, the seismic risk and the most probable collapse mechanism. What differs is the algorithm that determines the building assessment and the specific inputs. The proposed methods also offer to the compiler the possibility of indicating a structural improvement intervention on the basis of the results obtained, as a final step in the seismic assessment process. The two methods were then applied to a sample of 54 buildings, which were analysed in advance with conventional seismic analysis, to validate the results. The comparison showed a good correlation between the conventional analysis methods and the expeditious Adriseismic methods, showing an average difference of 25% between the index of structural response and the capacity/demand parameters used as terms of comparison.