Limited ductility moment resisting frames with RHS columns

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Physical testing and analytical studies have been conducted over the last 25 years to develop steel moment connections and column splices for ductile and moderately ductile moment resisting frames (MRFs); however, research on connections for limited ductility (Type LD) MRFs - which are less expensive and easier to fabricate - has lagged. This glaring lack of attention has left a large part of the Canadian steel market, in regions of low and moderate seismicity, underserved.The primary objective of this research to develop non-proprietary, pre-qualified moment connections for Type LD MRFs, and improved design methods for field-bolted RHS-to-RHS column splices, that are effective (i.e., that meet code requirements) and easy to fabricate. This research is expected to make Type LD MRFs a more attractive and efficient building system, to keep Canada's (approximately) 4-billion-dollar steel industry competitive.