GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 2.2 GNGTS 2023 Table 2. Final results with ranking. A1 A2 A3 A4 Results 0 0.98 0.97 0.96 A1 and A4 should be disregarded even if they are the most typical in practice. This shows how, if carefully studied, even more complex intervention might be the most economical and environmentally friendly. Therefore the second option has turned out to be the most viable overall and the most appropriate from all angles considered although being the most difficult to realize. The best alternative is a fascinating illustration of how innovative retrofit solutions may be advantageous and sustainable, and how they might eventually take the place of more traditional and inefficient rehabilitation alternatives from both an economic and environmental standpoint. The replacement of the bars (A2) is a viable choice since it tends to take sustainability over the long run and raises awareness of the maintenance issue. In fact, if the corroded bars are not replaced, they could result in substantial long-term local and global damage due to both a drop in ductility and strength. References Briseghella B, Borghese V, Contiguglia CP, Pelle A, Lavorato D, Santini S, Nuti C; 2022: The greenway for bridge column rehabilitation: a comparison between different techniques based on multi-criteria decision analysis. Rev. IBRACON Estrut. Mater., 15, 6, e15601, DOI 10.1590/S1983-41952022000600001 Xue J, Lavorato D, Bergami AV, Tarantino AM , Briseghella B, Nuti C; submitted: Reinforcing Bar Replacement in Damaged RC Bridge Column Plastic Hinges: Design Criteria and Experimental Investigation. Journal of Structural Engineering. He R, Grelle S, Sneed LH, Belarbi A; 2013: Rapid repair of a severely damaged RC column having fractured bars using externally bonded CFRP. Compos. Struct., 101, 225–242. DOI :http://dx.doi.org/10.1016/j.compstruct.2013.02.012 Lehman DE, Gookin SE, Nacamuli AM, Moehle JP; 2001: Repair of earthquake-damaged bridge columns. ACI Struct. J., 98, 2, 233–242,. Acknowledgement The authors want to thank BuzziUnicem and Ing. Angelo Pelle. Reference author: V. Borghese (vittoria.borghese@uniroma3.it)