Abstract
A comprehensive experimental study was conducted on cold-formed steel (CFS) beam-to-column connections, which included a configuration featuring a 3-bolted clip-angle (CA) connecting the web portions and two flange-cleats (FC) linking the top and bottom flange sections of both the beam and column. A total of 22 laboratory tests were performed. An in-depth parametric analysis of the moment-rotation behaviour was carried out and design guidelines were suggested for the optimum design of the chosen connection. The observed failure modes in the tested specimens are local buckling and distortional buckling of the clip-angle connector, pull through and bearing failure in the top and bottom FC respectively. Most of these connections attain at least 80 % of the plastic moment capacities of the associated beam. A new classification system has been suggested for the CFS beam-to-column connections from the 108 collated test data of CFS connections with only web portions connected (Type 1), with web and top flange portions connected (Type 2) and web, top and bottom flange portions connected (Type 3). The CFS connections are classified into rigid, semi-rigid, and flexible types, depending on their strength and stiffness characteristics in relation to the properties of the connected CFS beam.