Numerical Modelling and Validation of Cold-Formed Steel Lipped Channel Beam with Web Perforation Subjected to Web Crippling Under ITF Load Case

Abstract

Cold-formed steel sections are widely employed in steel construction because they are lighter and more economical than traditional hot-rolled members. Due to their numerous advantages, including a higher load-to-weight ratio, shape flexibility, and availability over relatively long spans, CFS have recently been used in construction. In the structural system, CFS channel sections can be used as joists and purlins; As a result, they are susceptible to various buckling instabilities, such as web crippling. Validation of cold-formed steel lipped channel sections with web openings subjected to web crippling was undertaken using  FE analysis, to investigate the effects of web holes and cross-section sizes on the web crippling strengths of channel sections subjected to web crippling under ITF  loading conditions. In this loading conditions, the hole was centred beneath the bearing plate. The present paper includes a web crippling strength of channel section by numerical study, where the models are validated against the performed experiments.