Limited ductility moment resisting frames with RHS columns

在过去的25年里，已经进行了物理测试和分析研究，以开发延性和中等延性抗弯框架（MRF）的钢弯矩连接和柱拼接;然而，对有限延性（LD型）MRF连接的研究已经滞后，这种连接更便宜，更容易制造。这种明显的缺乏关注，使得加拿大钢铁市场的很大一部分，在低和中等地震活动的地区，服务不足。本研究的主要目标是开发非专有的，预先合格的力矩连接类型LD MRF，并改进现场螺栓RHS到RHS柱拼接的设计方法，这是有效的（即，满足规范要求）并且易于制造。这项研究预计将使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.