Ricerc@Sapienza

This paper presents a general model for computing partial factors on the resistance or capacity-side, to be used in
codified limit-state design, accounting for epistemic uncertainty in the resistance model, aleatoric uncertainty on
variables input to the model, statistical uncertainty on these variables stemming from limited available data, and
target safety. The choice of resistance-side factors cannot be made independently of the demand-side ones, if a

Seismic risk assessment of an infrastructure, intended as a system of systems including buildings, lifelines and critical facilities, is typically affected by several sources of uncertainty, classified as aleatory or epistemic. Momentum to this work came from the need not only to properly take into account all these uncertainties, but also to provide the confidence in the estimate and quantify the contribution of the employed models and parameters to the total uncertainty.