This paper presents an experimental investigation on the behavior and performance of the cold-formed steel (CFS) framed shear walls sheathed with a composite panel which contains a 0.0686 mm (0.027 in.) steel sheet and a 15.9 mm (5/8 in.) gypsum board bonded together. The shear wall framing configurations were selected to be suitable for mid-rise buildings. Both monotonic and cyclic tests were conducted and the research was focused on the seismic performance. It was found that the composite panel provided considerably higher shear strength than the traditional wood based sheathing and the 0.838 mm (0.033 in.) steel sheathing. The composite panel demonstrated similar failure mechanism and post-peak behavior as the steel sheet sheathing. It is concluded that the tested composite panel is a suitable structural sheathing material for mid-rise buildings, particularly the Type Ⅰ and Ⅱ constructions, in seismic areas.
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