Seismic Collapse Evaluation of Steel Intermediate Moment Frames

A reduced beam section with a bolted web connection (RBS-B) is permitted for use only in Intermediate Moment Frames (IMF). In order to investigate whether IMFs with RBS-B connections provide a satisfactory seismic performance, this study evaluates the seismic performance of 3-, 6- 9- and 20-story IMFs with pre-qualified RBS-B connections following the FEAM-P695 procedure. Analysis results indicate that the probability of collapses is sensitive to the design parameters of IMF buildings with RBS-B connections.