ABSTRACT
In an eccentrically braced frame (EBF), the link-to-column connection plays a critical role in the seismic performance and safety of the frame. However, many of the welding and design conditions responsible for the poor performance of moment frame connections in the 1994 Northridge and 1995 Kobe Earthquakes are also present in EBF link-to-column connections. At the same time, the force and inelastic deformation demands at link-to-column connections are substantially different than at moment frame connections. A program of combined analytical and large-scale experimental studies are currently underway on link-to-column connections for seismic-resistant steel EBFs. Tests are being conducted on link-to-column connection details typical of pre-Northridge practices, as well as on connections incorporating welding, detailing and design improvements. This paper will provide an overview of this research program, as well as present initial results of the testing program.
