Pseudo-Dynamic Tests of Cold-Formed Thin-Walled Steel Wall

Abstract

This paper presents the dynamic response and failure mechanism for the cold-formed thin-walled steel wall. Based on current seismic provisions and previous research, Full-scale pseudo-dynamic tests (PDTs) were conducted on a 3m high cold-formed thin-walled steel wall. The time-history response, hysteretic behaviour, failure mode, stiffness degradation and ductility were investigated to analyse the dynamic response of the cold-formed thin-walled steel wall structure under a series of ground motion records. The results showed that the structural deformation position was concentrated at the intersection of the cross bar and the diagonal bar in the middle of the wall, and other joints had no obvious plastic deformation; The structure was still elastic under the frequently occurred earthquake of 7 degree and 8 degree. Under the rare earthquake, the stiffness degradation was developed rapidly and the bearing capacity was still higher, and also had better ductility. Cold-formed thin-Walled steel structure which exhibits excellent seismic behaviour and ductility, can be used as a reliable and effective assembly structure in seismic regions.