ABSTRACT
The chapter aims to approach the effects of the uncertain parameters on the global structural response. Masonry towers are diffused through the whole European territory; these structures show unique typological and morphological features that might lead to severe effects under horizontal loads. Some parametric considerations are developed in order to quantify, when performing a last level of evaluation approach through nonlinear models, the effects of the uncertainties on the seismic risk of such structural typology. The structural response was investigated by using a nonlinear static analysis approach. The results of the pushover analyses in terms of capacity curves were employed to perform a safety check according to the Capacity Spectrum Method. To analyse the seismic behaviour of the towers, full nonlinear time-history analyses were performed employing two-dimensional numerical models. The risk assessment of the towers was developed according the provisions of the Italian Guidelines for the assessment and mitigation of the seismic risk of the Cultural Heritage.
