In recent years, significant advancements have been made in the definition of innovative “minimal-damage structures,” chasing need for more resilient societies against extreme seismic events. this context, moment resisting frames (MRFs) equipped with self-centering damage-free (SCDF) devices column bases and beam-to-column joints represent a viable solution to improve structural resilience dama...

• Bare steel and composite semi-rigid moment-resisting connections were tested. The comprised CFS tubular sections connected using side plates. Various failure limit states captured through the tested connections. infill concrete effectively prevented beam local buckling. Side plate plasticity considered as a desirable energy dissipation mechanism. This paper presents results of full-scale phys...

One of the typically damaged steel beam-column connection during the Northridge earthquake of 1994 was bolted-web, welded-flange (BWWF), now known as “pre-Northridge” connection. Proposed post-Northridge connections are more ductile and capable of dissipating more energy, thus improving the behavior of steel moment resisting frames (SMRF). The post-Northridge connections with added ductility wi...

The column-tree constructional schemes allows for a reliable and convenient erection of moment resisting steel frames. Strengthening of column-tree connection with a haunch part can significantly improve seismic behavior of whole system. In the current study behavior of column-tree connections with haunched beams and end plate splices have been investigated. Special attention was paid for evalu...

The widespread brittle failure of welded beam-to-column connections caused by the 1994 Northridge and 1995 Kobe earthquakes highlighted the need for retrofitting measures effective in reducing the strength demand imposed on connections under cyclic loading. Researchers presented the reduced beam section (RBS) as a viable option to create a weak zone away from the connection, aiding the preventi...

Many recent research studies have focused on developing innovative seismic-resilient structural systems to reduce repair costs and downtime in the aftermath of an earthquake. In this regard, dealing with steel Moment Resisting Frames (MRFs), works demonstrated benefit deriving from adoption both low-damage self-centring column base connections, terms damage residual drifts reduction. Although s...

The connections are used to transfer forces and moments due applied loading. capability of the connection in resisting moment is classify types steelwork particularly for cold-formed steel. Classification schemes based on total moment-rotation behavior have been developed aid design analysis connections. Moment-rotation curve commonly describe that can be obtained from either theoretical or exp...

Today connections are playing an important role in the steel frames subjected to lateral seismic loading. The steel extended end-plate moment connection can play an important role in the steel frame when subjected to seismic loadings. In the past, this type of connection has been under investigation mainly when it was subjected to monotonic loading. After major recent earthquakes and failure of...