The definition of a seismic action for the structural analysis of existing buildings generally consists in the selection of a response spectrum. The Italian design code offers a basic procedure to define a reference spectrum that includes amplification effects from site conditions. However, when considering architectural heritage buildings, a more accurate determination of the local spectrum could be of interest, given the need to effectively protect these assets. A local seismic response analysis has been performed in three study sites using geological and geophysical tests for the reconstruction of the seismo-stratigraphy, individuation of the expected seismic inputs on bedrock, numerical analyses and individuation of the expected elastic acceleration response spectra. Test results have been applied in the structural analysis of the heritage buildings at the sites, showing significant effects on the assessment of their seismic safety.
