Structural performance of riveted connections in cold-formed steel wall stud

摘要

Cold-formed steel shear walls are commonly used in the housing industry. Generally, the wall stud connections play an important role in the seismic performance of these structures as they should be capable to dissipate the induced energy via the plastic deformation of the shear wall components. The riveted connection between the studs and the tracks is one of the most important components that dictates the behaviour and strength of such panels. In this paper, details of an experimental study on the behaviour and strength of two types of rivets which are applied in riveted wall stud connections under tension and compression monotonic loading are presented. Twenty-four full-scale specimens were taken into account. Two dominant failure modes are identified: rivet head failure and buckling failure of the section away from the connection in tension and compression tests, respectively. The results show that the second rivet type (type O) possesses a higher capacity in both tension and compression; and therefore is recommended to use by CFS designers. In addition, the design capacities of the connections were calculated based on some design codes and compared with the experimental results. It is shown that the codes are too conservative and can be improved considerably.