Seismic Behavior Assessment of RBS and AW-RBS Moment Resistant Connections with Double I-Beam

Abstract

Today Steel moment resistance connections are the most common type of connections that are widelyused in steel structures and certainly play a significant role in retrofitting, reliability and economic benefits.It is used also for improvement of the quality and useful life cycle of buildings. Considering the motionsimportance and after the Northridge earthquake, the invention of RBS connection was a turning point inresistant steel moment connections. This research observes the seismic behavior of the RBS connection withreduced section of flange and a new AW- RBS with reduced section of web in a double section beams that areapplicable in Iran. These observations are performed using ABQUS finite elements software. Many models areimplemented under cycle loads and ductility. Energy absorption and plastic behavior in the reduced sectionwere observed. Among the studied connections, AW- RBS with the least resistance and stiffness decrementhad bearded 8% off the rotation of the story. These models have acceptable behavior in cyclic loads.

Keywords

• RBS connections
• Accordion effect
• Double beam
• Plastic hinge
• Hysteresis behavior