Recent studies on the behavior of bolted extended end-plate connections designed for seismic-resistant frame have highlighted how the stress concentration produced by stiffeners on the beam flange can compromise connection performance, leading to the initiation of brittle fracture mechanisms. Therefore, a new alternative connection without the use of stiffeners was recently introduced in literature. This type of extended endplate connection features an innovative bolt arrangement around the beam flange that enables a more uniform distribution of stresses in the bolts, ensuring adequate performance under both monotonic and cyclic loads. However, the absence of stiffeners necessitates the use of thicker end plates than those required in prequalified connections, resulting in increased weight and cost. In this work a new beam-to-column design procedure was proposed for joints having the innovative bolt arrangement together with the rib stiffeners. The aim of this work is to investigate, by means of advanced numerical analyses, the performance of this new type of joints. The results show how the combination of these two aspects imply an increase of the beam-to-column joints performances representing a more economical solution.
SEISMIC BEHAVIOUR OF BOLTED BEAM-TO-COLUMN STEEL JOINTS
Monte F.;Tartaglia R.
;Maddaloni G.
2025-01-01
Abstract
Recent studies on the behavior of bolted extended end-plate connections designed for seismic-resistant frame have highlighted how the stress concentration produced by stiffeners on the beam flange can compromise connection performance, leading to the initiation of brittle fracture mechanisms. Therefore, a new alternative connection without the use of stiffeners was recently introduced in literature. This type of extended endplate connection features an innovative bolt arrangement around the beam flange that enables a more uniform distribution of stresses in the bolts, ensuring adequate performance under both monotonic and cyclic loads. However, the absence of stiffeners necessitates the use of thicker end plates than those required in prequalified connections, resulting in increased weight and cost. In this work a new beam-to-column design procedure was proposed for joints having the innovative bolt arrangement together with the rib stiffeners. The aim of this work is to investigate, by means of advanced numerical analyses, the performance of this new type of joints. The results show how the combination of these two aspects imply an increase of the beam-to-column joints performances representing a more economical solution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
