This study investigates the link between probabilistic seismic hazard assessment and corresponding loss estimations by using different ground-motion logic-tree frameworks from reliable large scale seismic hazard projects as well as the logic-tree framework established in this study. The predictive models selected for these logic trees are expected to represent the center, body and range of ground-motion intensity measure estimates. Regarding with the hazard component of risk assessment, the ground motion intensities obtained by alternative logic-tree frameworks showed considerable dispersion. To scrutinize the effect of this dispersion on seismic risk and loss assessment, fragility curves derived for low and mid-rise reinforced concrete and masonry structures in İstanbul are used. The comparisons of loss estimations indicate the importance of the uncertainty in ground motion intensity calculations and the decision making process of hazard calculation for seismic risk and loss estimations studies
