PSI - Issue 44

Maria Teresa De Risi et al. / Procedia Structural Integrity 44 (2023) 958–965 De Risi, Del Gaudio, Scala, Verderame/ Structural Integrity Procedia 00 (2022) 000–000

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failures, particularly in BCJs, were very important in limiting the buildings capacity at Severe Damage. A local strengthening strategy has been designed and analyzed to solve joints shear failures. It was noted that such strategy can be very useful in increasing PGA capacity, except when compressive joint failures prematurely occur, as in the 4-storey building analyzed herein. A preliminary estimation of cost intervention showed that such strategy can easily be covered by the current government contributions for seismic risk reduction, thus leading to an important reduction of casualties after earthquakes. However, it will be important in future works to assess how much such intervention can reduce the expected annual losses, since no changes in lateral stiffness or infills displacement capacity is introduced. The explicit modelling of masonry infills and shear failures in these analyses will be paramount. Acknowledgements This work was developed under the financial support of ReLUIS-DPC 2022-2023, funded by the Italian Department of Civil Protection (DPC). EDIL CAM® Sistemi Srl provided the information about the cost of strengthening interventions via CAM. These supports are gratefully acknowledged. Declaration of competing interests The authors declare no conflict of interest. References Biskinis, D., and Fardis, M.N. "Deformations at flexural yielding of members with continuous or lap-spliced bars." Structural Concrete 11.3 (2010): 127-138. CEN (2005) EN 1998-3-1-4 Eurocode 8, Design of Structures for Earthquake Resistance, Part 3, Assessment and Retrofitting of Buildings. European Committee for Standardization. Circolare 21 gennaio 2019, n. 7 C.S.LL.PP. Istruzioni per l'applicazione dell'«Aggiornamento delle "Norme tecniche per le costruzioni"» di cui al decreto ministeriale 17 gennaio 2018. GU n.35 del 11-2-2019 - Suppl. Ordinario n. 5. (in Italian) D. M. 58 28/02/2017. Linee guida per la classificazione del rischio sismico delle costruzioni. Italian Ministry of Infrastructures and Transport, De Risi, M. T., Di Domenico, M., Manfredi, V., Terrenzi, M., Camata, G., Mollaioli, F., ... & Verderame, G. M. (2022a). Modelling and Seismic Response Analysis of Italian pre-code and low-code Reinforced Concrete Buildings. Part I: Bare Frames. Journ.l of Earth. Eng., 1-32. De Risi, M.T., Ricci, P., Verderame, G.M. (2022b). Experimental Analysis of the Effectiveness of Pre-Stressed Steel Strips for the Strengthening of Beam-Column Joints in Existing RC Buildings, Proceeding of ANIDSIS 2022, 11-15 September 2022, Torino, Italy. Di Ludovico, M, Prota, A, Moroni, C, Manfredi, G, Dolce, M (2017a) Reconstruction process of damaged residential buildings outside historical centres after the L’Aquila earthquake: part II—“heavy damage” reconstruction. Bull Earthq Eng 15(2):693–729 Fajfar, P. (2000). A nonlinear analysis method for performance-based seismic design. Earthquake spectra, 16(3), 573-592. Masi, A., Digrisolo, A., and Santarsiero, G. (2014). Concrete strength variability in Italian RC buildings: analysis of a large database of core tests. In Applied Mechanics and Materials (Vol. 597, pp. 283-290). Trans Tech Publications Ltd. Mori, F., Mendicelli, A., Moscatelli, M., Romagnoli, G., Peronace, E., & Naso, G. (2020). A new Vs30 map for Italy based on the seismic microzonation dataset. Engineering Geology, 275, 105745. R.D. Regio Decreto Legge n. 2229 del 16/11/1939. Norme per la esecuzione delle opere in conglomerate cementizio semplice od armato. G.U. n. 92 del 18/04/1940 (in Italian) Verderame, G. M., Ricci, P., De Risi, M. T., & Del Gaudio, C. (2022). Experimental response of unreinforced exterior RC joints strengthened with prestressed steel strips. Engineering Structures, 251, 113358. Verderame, G.M., Polese, M., Mariniello, C., Manfredi, G., (2010). A simulated design procedure for the assessment of seismic capacity of existing reinforced concrete buildings. Advances in Engineering Software, 41(2), 323-335. Verderame, G.M., Ricci, P., Esposito, M., Manfredi, G., (2012). STIL v1.0 - Software per la caratterizzazione delle proprietà meccaniche degli acciai da c.a. tra il 1950 e il 2000. ReLUIS, http://www.reluis.it/ Verderame, G. M., & Ricci, P. (2018). An empirical approach for nonlinear modelling and deformation capacity assessment of RC columns with plain bars. Engineering Structures, 176, 539-554. Vidic, T., Fajfar, P., & Fischinger, M. (1994). Consistent inelastic design spectra: strength and displacement. Earthquake Engineering & Structural Dynamics, 23(5), 507-521. Italy. http://www.mit.gov. it/normativa/decreto-ministeriale-numero-58-del-28022 017 (in Italian). D.M. 2018, Aggiornamento delle «Norme Tecniche per le Costruzioni» - D.M. 17/1/18. (in Italian)