Moment Connection Using Wide Flange Beam and Hollow Structural Section Column in Steel Moment Frames Structures Under Seismic Loads

Abstract eng:
The use of Hollow Structural Sections (HSS) provide an alternative for steel buildings in seismic zones, increasing the structural redundancy without incorporating bracings and the performance of flexural, compression and torsion unlike other columns sections. The HSS columns have shown satisfactory performance under seismic loads, as observed in buildings with steel moment frames in the Honshu earthquake (2011). The purpose of this research is to propose a new moment connection, EP-HSS (“End-plate to Hollow Structural Section"), using a wide flange beam and HSS column through a configuration that is out of the range of prequalification established in the ANSI/AISC 358-10 Specification, as an alternative to the traditional configuration of steel moment frames established in current codes. From an analytical, numerical (FEM) and experimental study, based on qualification protocols established in the ANSI/AISC 341-10 Specification, the results showed that the EP-HSS allows the development of inelastic action only on the beam, avoids stress concentration in the column and develops a high energy dissipation capacity, ensuring satisfactory performance under seismic actions without brittle failure mechanisms, satisfying the requirements and protocols established in the AISC (American Institute of Steel Construction) Specifications for seismic zones.

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