The present work is focused on seismic assessment and retrofit of the beam-to-column joints of an existing non-conforming steel building. Refined finite element analyses were performed to investigate the performance of the existing beam-to-column joints under monotonic and cyclic loading conditions as well as the effectiveness of different strengthening interventions. The main features of these joints are the continuity of beams and hollow square columns interrupted at each level and connected by a bolted flange that is strengthened by fillet welds to the tapered flanges of the beams. The results of the finite element simulations show that the existing joints of the examined building exhibit very poor seismic behaviour, mainly due to failure of the welds. On the contrary, the strengthened joints have enhanced response. The comparison between the response of the unreinforced and the various retrofitted joints is described, and the best solutions in terms of both cyclic behaviour and technological feasibility are subsequently identified.

Seismic Assessment of Beam-To-Column Joints for a Non-conforming MRF Existing Structure

Tartaglia R.
;
Milone A.;D'Aniello M.;Landolfo R.
2022

Abstract

The present work is focused on seismic assessment and retrofit of the beam-to-column joints of an existing non-conforming steel building. Refined finite element analyses were performed to investigate the performance of the existing beam-to-column joints under monotonic and cyclic loading conditions as well as the effectiveness of different strengthening interventions. The main features of these joints are the continuity of beams and hollow square columns interrupted at each level and connected by a bolted flange that is strengthened by fillet welds to the tapered flanges of the beams. The results of the finite element simulations show that the existing joints of the examined building exhibit very poor seismic behaviour, mainly due to failure of the welds. On the contrary, the strengthened joints have enhanced response. The comparison between the response of the unreinforced and the various retrofitted joints is described, and the best solutions in terms of both cyclic behaviour and technological feasibility are subsequently identified.
978-3-031-03810-5
978-3-031-03811-2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/900482
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