Nonlinear static analysis of cold-formed steel frame with rigid connections

Abstract

Cold-formed steel (CFS) has become widely popular in mid and low-rise housing owing to efficient construction practice, technical, structural, and economic advantages over conventional structural materials. However, these sections are still not presented in seismic region because of their lack of understanding in seismic response. To address this problem, CFS frames used in residential building were analysed for lateral load capabilities. A finite element analysis of cold-formed steel frames (CFSF) with rigid connections was presented in this research. 72 types of CFS frames made from developed upright sections were simulated for nonlinear static behaviour using a commercial package. A geometrical parametric study on lateral load capabilities with respect to maximum permitted lateral deflection was presented. The performance of frames for lateral load was found to be improved significantly by increasing the thickness of uprights and provision of channel stiffeners.