Limited ductility moment resisting frames with RHS columns

在过去的25年里，已经进行了物理试验和分析研究，以开发用于延性和中等延性抗弯框架(MRF)的钢弯矩连接和柱拼接；然而，针对有限延性(LD型)MRF的连接的研究一直滞后，这种连接更便宜，更容易制造。这项研究的主要目标是开发LD型MRF的非专有、预认证的弯矩连接，并改进现场螺栓RHS-RHS柱拼接的设计方法，有效(即，满足规范要求)和易于制造的设计方法。这项研究有望使LD型MRF成为一种更具吸引力和效率的建筑系统，以保持加拿大(约)40亿美元的钢铁行业的竞争力。

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.