PSI - Issue 44

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 44 (2023) 1901–1908

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. Abstract In the last decades, increasing efforts have been devoted to developing new types of beam-to-column connections able to accommodate the seismic local ductility demand and dissipate the seismic input energy. Among the proposed strategies, the so called RBS (Reduced Beam Section) has been widely exploited in the construction market. Nevertheless, new proposals based on the partial-strength philosophy gained approval. Their main advantage is that, in the case of rare seismic events, similarly to RBSs, the connections exhibit wide and stable hysteretic cycles, yet concentrating damage in elements that undergo only minor yielding or are easy to replace. The FREE from DAMage (FREEDAM) and the double split (or X-shaped or hourglass) T-stub connections are promising solutions within this framework. The first strategy includes friction dampers in beam-to-column joints to dissipate the seismic input energy and fix the maximum bending moments transferred to the columns. The second solution differs from the traditional one because the flange of the T-element is appropriately cut according to an hourglass shape. This form replicates the bending moment in the plate part between the stem and the bolts, ensuring a uniform yielding of this part. Even though many research works have already been developed on such innovative connection typologies, experimental results on large-scale structures are still quite limited. Aiming to fill this knowledge gap, an experimental program is currently ongoing at the STRuctural ENGineering Test Hall Laboratory (STRENGTH) of the University of Salerno concerning the pseudo-dynamic testing of a large-scale two-storey steel building equipped with the connection typologies mentioned above. The mock-up has experienced the same sequence of five accelerograms in all the campaigns by the pseudo-dynamic test method. This paper discusses the comparison among the main results obtained so far in the experimental campaigns. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy Keywords: pseudo-dynamic testing method; energy dissipation capacity; ductility; resilience. XIX ANIDIS Conference, Seismic Engineering in Italy Seismic behaviour of steel Moment Resisting Frames with traditional and innovative connections Sabatino Di Benedetto*, Antonella Bianca Francavilla, Massimo Latour, Vincenzo Piluso, Gianvittorio Rizzano University of Salerno, Department of Civil Engineering, via Giovanni Paolo II 132, Fisciano, 84084, Italy Abstract In the last decades, increasing efforts have been devoted to developing new types of beam-to-column connections able to accommodate the seismic local ductility demand an dissipa e th s ismic i put energy. Among the proposed strategie , the so called RBS (Reduc d Beam Section) has b en widely exploited in th construction market. Nevert less, new proposals based n the partial-strength philosophy gai ed approval. Their main advantage i that, in the case of ar seismic events, similarly to RBSs, he con ections exhibit wide and stable hysteretic cycles, ye concentr ing damage in elements that undergo only minor yielding or are asy to replace. Th FREE from DAMage (FREEDAM) a d the double spl t (or X-shaped or hourglass) T-stub connecti ns are promising solutions within this framework. The first strategy includes friction dampers in beam-to-column joints t dissipate th seis ic input energy and fix the aximum b nding moments transfer ed to the colum s. The se nd solution differ from the tradit onal on because the flange of the T-eleme t is appropriately cut according to a hourglass shape. This form replicates the bending moment in the plate part be ween the stem and the bolts, ens ring a uniform yielding of this part. Even though many r search works have alre dy been dev loped on such innovative connection typologies, experimental results on large-scale structur s are still quite limit d. Aimi g to fill this knowledge gap, an experime tal pr ram is cu rently ongoing at the STRuctural ENGineering Test Hall Laboratory (STRENGTH) f the University of Salerno concerning the ps udo-dynamic testing of a large-scale two-storey steel building equipped with the connection typol gies menti ed above. The m ck-up has experienced the same sequence of five accelerograms in all the campaigns by the ps udo-dynamic test met od. This aper discusses the comparison among the main results obtained so far in the experimental campaigns. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of scientific committe of the XIX ANIDIS C nference, Seismic Engineering in Italy Keywords: pseudo-dynamic testing method; energy dissipation capacity; ductility; resilience. XIX ANIDIS Conference, Seismic Engineering in Italy Seismic behaviour of steel Moment Resisting Frames with traditional and innovative connections Sabatino Di Benedetto*, Antonella Bianca Francavilla, Massimo Latour, Vincenzo Piluso, Gianvittorio Rizzano University of Salerno, Department of Civil Engineering, via Giovanni Paolo II 132, Fisciano, 84084, Italy

* Corresponding author E-mail address: sdibenedetto@unisa.it * Corresponding author E-mail address: sdibenedetto@unisa.it

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. 10.1016/j.prostr.2023.01.243