Evaluation of building dynamic properties through in situ experimental techniques and 1D modeling: The example of Catania, Italy

• Assessment of buildings dynamical properties using ambient noise records, processed through spectral ratio techniques.
• Site amplifications evaluated using simple 1D modeling.
• Estimate of fundamental period–height relationships through regression analysis.

Ambient noise records, processed through spectral ratio techniques were used to assess the dynamic properties of a sample survey of both reinforced concrete and masonry buildings. Soil-structure interactions were also investigated using simple 1D modeling to evaluate site amplifications, comparing the results with target spectra postulated by Eurocode8 requirements. The experimental periods obtained are always lower than those proposed by the building regulations. Therefore one has to pay attention in estimating seismic actions, particularly in those sites of the urban area where there are outcrops of either volcanic products or soft coarse materials.