Seismic response of the Farneto del Principe Dam in Italy usign Hazard-Consistent and Site-Specific Groud Motions

: The Farneto del Principe dam is located in the Calabria region, a seismically active area in southern Italy. Analysis of the dynamic behavior of this type of structures requires evaluation of the seismic demands to which it can reasonably be expected to be subjected in future earthquake events. Demand evaluation usually occurs in two phases: (1) Probabilistic seismic hazard analysis (PSHA) and (2) selection of an appropriate suite of acceleration time series for use in response history analysis. A site-speific PSHA for the Farneto del Principe dam site was developed. The main features of this analysis are the inclusion of two newly implemented seismogenic sources (Lakes fault and subduction interface of the Calabrian arc) and a modern ground motion prediction equation logic tree that includes recent global models. Sensitivity studies are also presented. The results of the PSHA were used to define two target spectra, a Uniform Hazard Spectrum (UHS) and a scenario spectrum (Conditional Spectrum, CS). The target spectra were used for selecting and scaling appropriate acceleration time series suites. The computation of the CS and the time series suites selection were based on the natural periods and mode shapes of the dam numerically evaluated by the Finite Element Method. On these basis, the reliability of the response history analysis is ensured by the rigorous procedure used to evaluate the acceleration time-histories. The seismic response of the Farneto del Principe dam to these hazard-consistent ground motion suites was evaluated by means of several two-dimensional numerical analyses. For evaluating the performance of the dam, typical results are presented and discussed.