Seismic vulnerability reduction for historical buildings: The case study of house of mosaics

摘要

The present paper explores the possibility to obtain the reduction of seismic vulnerabilityrnof historical buildings through subsoil treatments, in order to reduce the seismic actions. The study isrnmotivated by the unsatisfactory degree of protection of many historical buildings with respect of seismicrnrisk, and by the inadequacy and/or the inability to adopt the reinforcement or base isolation methodologiesrnused on the new constructions. The issue has been addressed through a multi-disciplinary approach.rnA suitable case study was selected, i.e. the ancient Villa Favorita park on the sea in Herculaneum, a siternwell-characterized in terms of geology, stratigraphy, and mechanical properties of the soil. These featuresrnallowed to simulate the seismic subsoil response by 1D modeling, with site effects exclusively induced byrnthe stratigraphy. The seismic behaviour of the building, with high historical-architectural value, was accuratelyrnreproduced by a 3D model. The study was conducted through uncoupled numerical analysis of thernsite response and the structure in elevation, analyzing the effects of possible artificial variations of soilrnproperties on the seismic safety of the building.