SURVEY OF BUILDINGS, ELABORATION OF URBAN MAPS, DATABASES FOR DESCRIBING THE SEISMIC BEHAVIOUR OF HISTORICAL SITES

The survey was not extended on a single block, as was the case previously examined, but on a larger portion of territory characterized by diversified manufacturing of building. The urban texture of the historic city center of Chieri, the object of analysis, ranges from the Middle Age, with buildings made of brick masonry and horizontal elements in wooden structure, until, in the sixties of Nineteen Century, with modern buildings made of reinforced concrete. Inside the block it is possible to find buildings rich in architectural and construction typical of an urban transformation that, since medieval age, consolidated, through the Baroque period to the end of the nineteenth century, as a result of strong urban and architectural transformations. The research was developed according to the following steps: - Identification of a sample portion of land characterized by a wide assortment of historical buildings of different architectural features and different uses, with load-bearing masonry structure and stratigraphy of significant historical periods from the Middle Ages to the twentieth century. - Geometrical survey of the actual state and return of buildings in their current state with the identification of the buildings, their height, width, openings at ground level and over, survey of common areas such as hallways, stairwells and courtyards. - Analysis of the fronts, the openings and the development plano-elevation of buildings, the aspect ratio of each architectural element constituting the block; - Identification of materials, the elements making up the organism resistant, both in material and constructive state, with attention to construction techniques and to the connections between the elements, as defined by the DPCM 09/02/2011, for the assessment and mitigation of seismic risk of the cultural heritage in relation to technical standards for construction - Identification of the hierarchy and constructive relations between the building and the urban context. - Identification of carriers as unidirectional or bidirectional load-bearing walls, vertical columns or masonry pillars or galleries. The presence of spaces with a significant height interstory and the presence of buildings sleeve simple or double sleeve. - Identification, where possible, of the areas of discontinuity and inhomogeneities of materials due to different construction phases (additional bodies, cant, substitutions of certain parts of buildings or floors, insertion of new structural elements and balconies etc.).