Abstract
An experimental investigation on the fillet welded clip-angle connection between the cold-formed steel (CFS) beam and column was conducted under four-point bending. The purpose of the study was to investigate the shear strength of the fillet welded clip-angle between the CFS beam and column. To accomplish this objective, a total of 30 experiments with 27 clip-angle configurations and three repeat tests were carried out. The parameters studied include thickness and aspect ratio of the clip-angle. The clip-angles were found to fail in (i) distortional buckling for an aspect ratio (W/D) < 0.8 and (ii) local buckling for an aspect ratio (W/D) ≥ 0.8. The experimental outcomes of the welded clip-angles were summarized and compared with the design strength predictions for screwed and bolted connections in terms of design shear strength equations and behavior of the test specimens. The studies indicate that the welded connections exhibited higher stiffness with respect to the screwed and bolted connections resulting in lower serviceability limit requirements. Based on the test results, a new shear strength design equation for the fillet welded clip-angle is suggested. Further, the reliability analysis is conducted to evaluate the resistance and safety factors for the LRFD, LSD and ASD methods to determine the design shear capacities accordingly. The effectiveness of the proposed design method for the welded clip-angle between CFS beam and column is illustrated with the help of the design example in this paper.
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