PSI - Issue 78

Angelo Masi et al. / Procedia Structural Integrity 78 (2026) 686–693

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enhance the performance of RC beam-column joints, is being investigated by means of numerical simulation and experimental tests, following a proper methodology. In the paper, the experimental tests in progress at the Laboratory of Structures of the University of Basilicata on standalone devices under cyclic quasi-static loading have been described. Preliminary results show that the cyclic response appears stable, without significant intra-cycle degradation, and quite symmetric with respect to the loading and unloading directions. During the tests, the specimen reached the maximum drift of 2.75%, after that its hourglass elements failed in shear. The equivalent viscous damping due to hysteresis, calculated at the maximum drift value, is about 30%. In the ongoing activities, these results, together with those from complementary numerical/experimental analyses considered in the methodology, are being used to define a cyclic moment-rotation relationship for the lumped modelling approach, aimed at assessing a 3D pre-code RC building type under seismic actions and possible foundation settlements. Acknowledgments This work has been carried out in the context of the SAFER-REBUILT project (Sustainable Approaches For Earthquake Resistant_REhabilitation solutions for the BUILT environment), founded by the Extended Partnership Multi-Risk sciEnce for resilienT commUnities undeR a changiNg climate (PE RETURN,https://www.fondazionereturn.it/) - Spoke VS3 Earthquake and Volcanoes (project code PE00000005, CUP H93C22000610002). References Aljabbri, N. A. S., Karim, A. A., Majeed, F.H., 2024. Carbon fiber-reinforced polymer composites integrated beam–column joints with improved strength performance against seismic events: Numerical model simulation. Eng, 5(2), 1112–1139. https://doi.org/10.3390/eng5020061 Alkhateeb, M.Y., Hejazi, F., 2024. Strengthening reinforced concrete beams through integration of CFRP bars, mechanical anchorage system, and concrete jacketing. Materials, 17(12), 2794. https://doi.org/10.3390/ma17122794 Casolo, S., Uva, G., Fiore, A., Mangialardi, F., 2023. Modelling and seismic response analysis of existing Italian residential RC buildings retrofitted by seismic isolation. Journal of Earthquake Engineering, 27(1), 46–69. https://doi.org/10.1080/13632469.2022.2050174 Di Cesare, A., Lamarucciola, N., Ponzo, F.C., 2023. Multi-stripe dynamic analysis of existing RC buildings seismically retrofitted by base isolation or dissipative bracing systems conforming to Italian code, 18th World Conference on Seismic Isolation (18WCSI) and 7th International Conference on Earthquake Engineering and Seismology (7ICEES), 1–12. Ielpo, P., Santarsiero, G., Picciano, V., Masi, A., 2025. Seismic Retrofit of RC Beam-Column Joints with External Dissipation Devices: A Numerical Study, COMPDYN 2025, 10th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.), Rhodes Island, Greece, 15-18 June 2025 Manfredi, V., Santarsiero, G., Masi, A., Ventura, G., 2021. The High-Performance Dissipating Frame (HPDF) system for the seismic strengthening of RC existing buildings. Sustainability, 13(4), 1864. https://doi.org/10.3390/su13041864 Ministero delle Infrastrutture e dei Trasporti. Decreto 17 gennaio 2018 - Aggiornamento delle "Norme tecniche per le costruzioni". Gazzetta Ufficiale della Repubblica Italiana, Serie Generale n. 42 del 20 febbraio 2018 – Suppl. Ordinario n. 8. Ministero delle Infrastrutture e dei Trasporti. Circolare 21 gennaio 2019, n. 7 - Istruzioni per l’applicazione dell’Aggiornamento delle «Norme tecniche per le costruzioni» di cui al decreto ministeriale 17 gennaio 2018. Gazzetta Ufficiale della Repubblica Italiana, Serie Generale n. 35 del 11 febbraio 2019 – Suppl. Ordinario n. 5. Passoni, C., Palumbo, E., Pinho, R., Marini, A., 2021. The LCT Challenge: Defining New Design Objectives 904 to Increase the Sustainability of Building Retrofit Interventions. Sustain., 14(14), 8860. Ponzo, F. C., Auletta, G., Ielpo, P., Ditommaso, R., 2024. DInSAR–SBAS satellite monitoring of infrastructures: How temperature affects the “Ponte della Musica” case study. Journal of Civil Structural Health Monitoring, 14, 745–761. https://doi.org/10.1007/s13349-023-00751-z ReLUIS 2011. Linee guida per riparazione e rafforzamento di elementi strutturali, tamponature e partizioni. Napoli: Doppiavoce Edizioni. Ro, K.M., Kim, M.S., Lee, Y.H., 2023. Improved shear strength equation for reinforced concrete columns retrofitted with hybrid concrete jackets. Materials, 16(10), 3734. https://doi.org/10.3390/ma16103734 Santarsiero, G., Manfredi, V., Masi, A., 2020. Numerical evaluation of the Steel Plate Energy Absorption Device (SPEAD) for seismic strengthening of RC frame structures. International Journal of Civil Engineering, 18(8), 835–850. https://doi.org/10.1007/s40999-020-00510-x Santarsiero, G., D’Angola, A., Ventura, G., Masi, A., Manfredi, V., Picciano, V., Digrisolo, A., 2023. Sustainable renovation of public buildings through seismic–energy upgrading: Methodology and application to an RC school building. Infrastructures, 8(12), 168. Ventura, G., Masi, A., Santarsiero, G., Manfredi, V., Digrisolo, A., Nigro, D., 2019. Sviluppo di tecniche integrate di miglioramento delle prestazioni sismiche ed energetiche: descrizione e risultati preliminari del programma sperimentale su portali in c.a., 18th ANIDIS Conference, “L’ingegneria sismica in Italia”, 15-19 settembre 2019, Ascoli Piceno