Uno strumento di pianificazione per la salvaguardia degli edifici storico-monumentali. Un caso di studio: la chiesa del SS. Salvatore a Naro

The historical heritage, and in particular the monumental buildings, are among the most vulnerable artifacts against seismic events, and often also have serious repercussions on what is commonly defined as "urban risk". For the conservation and protection of cultural heritage with regard to seismic action, it is necessary to have analysis tools capable of allowing the assessment of vulnerability and risk, as well as the design of seismic improvement interventions. The Guidelines for the assessment and reduction of the seismic risk of cultural heritage - alignment with the new technical standards for buildings, G.U. 26.02.2011, n ° 47 (hereinafter referred to as Guidelines) constitute programmatic tool for the mitigation of the seismic risk of the protected heritage and operational tool for the quantitative assessment of the seismic safety of a historic masonry building, in pre and post intervention conditions. They propose a path of knowledge of the artifact that returns a confidence factor Fc according to the degree of depth of the investigations and a subsequent assessment of the vulnerability with a modeling of the structural behavior identified by three different Levels of Assessment (LV1, LV2 LV3) of increasing completeness. The article aims to critically examine the methods and tools proposed by the Guidelines through the application to a specific case of the historical-monumental heritage of Agrigento: the church of SS. Salvatore di Naro (see Photo 1).