GNGTS 2018 - 37° Convegno Nazionale

416 GNGTS 2018 S essione 2.2 References AA.VV. (2008) – Note illustrative della Carta Geologica d’Italia alla scala 1:50.000, foglio 374 Roma. APAT, Dipartimento Difesa del Suolo, Servizio Geologico d’Italia, stampa: S.EL.CA. , Firenze, 156 pp, in visione presso http://www.isprambiente.gov.it/Media/carg/note_illustrative/374_Roma.pdf Tab. 2 - The configuration adopted for the modelling whose output spectra are reported in Fig. 3. Reference acronym of Base level for the modelling Seismic input source output spectrum in Fig. 3 free-field Rexel db free-field (street level) Rexel catalogue foundation Rexel db foundation level (-12 m from street level) Rexel catalogue free-field RAN db free-field (street level) RAN catalogue foundation RAN db foundation level (-12 m from street level) RAN catalogue Tab. 3 - The configuration adopted for the NTC (2008) spectra reported in Fig. 3. Vn50 and c2 refer to the nominal design life (here assumed as 50 years) and the building usage class (here assumed as c2), respectively. Reference acronym of NTC Ultimate Limit States Soil category (2008) spectrum in Fig. 3 slv D Vn50 c2 Life Safety Limit State (slv) Soil type D slc D Vn50 c2 Collapse Limit State (slc) Soil type D slv C Vn50 c2 Life Safety Limit State State (slv) Soil type C slc C Vn50 c2 Collapse Limit State (slc) Soil type C Fig. 3 - Comparison between the output spectra obtained from the modelling (free-field Rexel db; foundation Rexel db; free-field RAN db; foundation RAN db) and those from NTC (2008) (slv D Vn50 c2; slc D Vn50 c2; slv C Vn50 c2; slc C Vn50 c2).