Abstract:Major earthquakes occurring in Northridge, USA in January, 1994 and Kobe, Japan, in January 1995 focused attention on the seismic performance of steel structural sections, particularly thick-flange 'jumbo' columns used in conjunction with welded beam-column connections. Subsequent investigations identified joint design, poor fabrication, and low weld metal toughness as significant factors in the instances of cracking which occurred in and around the special moment-resistant frame (SMRF) welded beam-column conn… Show more
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