PSI - Issue 44

Andrea Natale et al. / Procedia Structural Integrity 44 (2023) 1768–1775 Andrea Natale et al./ Structural Integrity Procedia 00 (2022) 000–000

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EALs for the different configurations and retrofit solutions. With reference to the case study in exam the following conclusions can be drawn: • The application of the base isolation provides an important reduction in terms of drift and acceleration demand with significant advantages in terms of reduction of the expected losses; • This has a direct impact in terms of EAL and PBT with a value of 0.33 and 33; • The base isolation is more convenient (low PBT) as much as the performance of the building in as-built configuration are low; • The concrete strength and the transversal reinforcement ratio affect the seismic capacity of the As-built configuration, in particular the shear strength of the columns, influencing the value of the EALs and PBT; in this case the increasing value of the Asw/s produce a reduction in the EALsAs-Built with an increase of PBT’s value Further research effort is needed to extend the proposed procedure to other case studies in order to draw more general conclusion that may reflect the economic convenience of base isolation varying the hazard of the site, the type of building and the geometric characteristics. Acknowledgements The support of Bolina Ingegneria for providing the documents of the case study building and for the technical support in the analysis of the data is gratefully acknowledge. References Adhikari S (2006) Damping modelling using generalized proportional damping. J Sound Vib 293:156–170. https://doi.org/10.1016/j.jsv.2005.09.034 ATC - Applied Technology Council FP-58 (2012) Next-generation Seismic Performance Assessment for Buildings, Volume 2 – Implementation Guide. Fed Emerg Manag Agency, Washington, DC Biskinis DE, Roupakias GK, Fardis MN (2004) Degradation of shear strength of reinforced concrete members with inelastic cyclic displacements. ACI Struct J 101:773–783. https://doi.org/10.14359/13452 Cardone D (2016) Fragility curves and loss functions for RC structural components with smooth rebars. Earthq Struct 10:1181–1212. https://doi.org/10.12989/eas.2016.10.5.1181 Cardone D, Perrone G (2015) Developing fragility curves and loss functions for masonry infill walls. Earthq Struct 9:257–279. https://doi.org/10.12989/eas.2015.9.1.257 Chrysostomou CZ, Gergely P, Abel JF (2002) A Six-Strut Model For NonLinear Dynamic Analysis of Steel Infilled Frames. Int J Struct Stab Dyn 02:335–353. https://doi.org/10.1142/s0219455402000567 Colangelo F (1999) Qualificazione risposta sismica pseudodinamica e modelli fenomenologici di portali di c.a tamponati con laterizio Combescure D, Pegon P (1997) α -Operator splitting time integration technique for pseudodynamic testing error propagation analysis. Soil Dyn Earthq Eng 16:427–443 Del Vecchio C, Di Ludovico M, Prota A (2020) Repair costs of reinforced concrete building components: from actual data analysis to calibrated consequence functions. Earthq Spectra 1–25. https://doi.org/10.1177/8755293019878194 Fenz M., Constantinou MC (2006) Behaviour of the double concave Friction Pendulum bearing. Earthq Eng Struct Dyn 35:1403–1424. https://doi.org/10.1002/eqe.589 Galanis PH, Moehle JP (2015) Development of collapse indicators for risk assessment of older-type reinforced concrete buildings. Earthq Spectra 31:1991–2006. https://doi.org/10.1193/080613EQS225M Iervolino I, Galasso C, Cosenza E (2010) REXEL: Computer aided record selection for code-based seismic structural analysis. Bull Earthq Eng 8:339–362. https://doi.org/10.1007/s10518-009-9146-1 Iervolino I, Maddaloni G, Cosenza E (2007) Accelerogrammi naturali compatibili con le specifiche dell ’ OPCM 3431 per l ’ analisi sismica delle strutture Infrastrutture MD, Trasporti EDEI (2018) Aggiornamento delle «Norme tecniche per le costruzioni». Gazz Uff della Repubb Ital 1–198 Masi A, Vona M (2009) Estimation of the in-situ concrete strength: provisions of the european and italian seismic codes and possible improvements. RELUIS - Eurocode 8 Perspect from Ital Standpoint Work 67–77 Natale A, Del Vecchio C, Di Ludovico M (2020) Seismic retrofit solutions using base isolation for existing RC buildings: economic feasibilty and pay-back time. Bull Earthq Eng 19:483–512. https://doi.org/10.1007/s10518-020-00988-9 Panagiotakos TB, Fardis MN (1996) Seismic response of infilled RC frames structures. Prooceedings of the Eleventh World Conference on Earthquake Engineering, Mexico, Paper No. 225 Verderame GM, Ricci P, Esposito M, Sansiviero FC (2011) Le Caratteristiche Meccaniche degli Acciai Impiegati nelle Strutture in C.A. Realizzate dal 1950 al 1980. Aicap- Reluis 1–8