PSI - Issue 78

Salvatore Mottola et al. / Procedia Structural Integrity 78 (2026) 623–630

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0.0 0.5 1.0 1.5 2.0 Peak Absolute Acceleration [g]

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Peak IDR

Fig. 9. Peak IDR over the height: (a) X-direction; (b) Y-direction. Peak absolute acceleration over the height: (c) X-direction; (d) Y-direction.

4. Conclusions This study presents a comprehensive and effective design methodology for the seismic retrofit of RC buildings employing dissipative exoskeleton systems. This innovative approach is particularly well-suited for strategically important and seismically vulnerable structures that must maintain operational functionality throughout the retrofit process, minimizing disruption to occupants and building services. The exoskeleton solution is designed to be both rapid in implementation and minimally invasive, offering a reversible retrofit alternative that not only strengthens the structural framework but also enhances the building’s overall energ efficienc and environmental performance. The proposed strategy employs P-Spectra to establish a direct relationship between performance levels and mechanical properties of the dampers. Through rigorous nonlinear time-history analyses, the effectiveness of this method has been demonstrated by significant reductions in critical seismic response parameters, including inter-story drift ratios and peak acceleration values. These improvements underscore the capability of dissipative exoskeletons to substantially increase seismic resilience, reducing potential damage and enhancing occupant safety during seismic events. References Ferraioli, M., & Lavino, A., 2 18. A displacement-based design method for seismic retrofit of RC buildings using dissipative braces. Math Probl ng, 5364564. Ferraioli, M., Nuzzo, ., Concilio, A., 2 19. hape memor allo s for earthquake building protection. In Proceedings of PI - The International ociet for Optical ngineering, 1 97 . Ferraioli, M., Lavino, A., Mandara, A., 2 2 . eismic retrofit design method of RC buildings using metallic ielding dampers. Ingegneria ismica 37(1 , 19–32. Ferraioli, M., Lavino, A., Molitierno, C., i Lauro, G., 2 21. eismic retrofit of an existing reinforced concrete building with buckling restrained braces. Open J Civ ng 15, 2 3–225. Ferraioli, M., Concilio, A., & Molitierno, C., 2 22. eismic performance of a reinforced concrete building retrofitted with self-centering shape memor allo braces. arthq ng ng ib, 21(3 , 785–8 9. Ferraioli, M., Lavino, A., e Matteis, G.,2 23a. A design method for seismic retrofit of reinforced concrete frame buildings using aluminum shear panels. Arch Civ Mech ng 23(2 , 1 6. Ferraioli, M., Laurenza, ., Lavino, A., Frattolillo, C., e Matteis, G., 2 23b. eismic retrofit of a steel-reinforced concrete hospital building using continuous energ -dissipative steel columns. teel Compos truct 47(4 , 467–488. Takeda, T., ozen, M. A., Nielsen, N. N., 197 . Reinforced concrete response to simulated earthquakes. J truct iv 96(12 , 2557–2573. Guo, J. W. W., & Christopoulos, C., 2 13. A procedure for generating performance spectra for structures equipped with passive supplemental dampers. arthq ng truct n 42, 1321–1338. Guo, J. W. W., & Christopoulos, C., 2 13. Performance spectra based method for the seismic design of structures equipped with passive supplemental damping s stems. arthq ng truct n 42, 935–952. Mottola, ., Ferraioli, M., Mistakidis, ., e Matteis, G., 2 24. ehavior and design of dumbbell-shaped steel strip dampers. In: Proc. of the 11th International Conference on ehaviour of teel tructures in eismic Areas. T A 2 24. Lecture Notes in Civil ngineering 52 , 174–186. Ferraioli, M., Mottola, ., Mistakidis, ., e Matteis, G., 2 25. Lateral torsional buckling design of dumbbell-shaped steel strip dampers. tructures 77,198. NTC-Guidelines, 2 18. Technical tandards for Constructions. Official Journal of the Italian Republic. N 1998-3, 2 5. urocode 8 - esign of structures for earthquake resistance. uropean Communities for tandardization. Iervolino, I., Galasso, C., & Cosenza, ., 2 1 . R X L: Computer aided record selection for code-based seismic structural anal sis. ull arthq ng 8(2 , 339362. eismosoft (2 23 . eismo truct - A computer program for static and d namic nonlinear anal sis of framed structures.