Axial capacity of cold-formed steel channel sections with slits
Year: 2024
Type: article
Abstract: Cold-formed steel (CFS) studs often include slits in their webs to improve thermal performance. However, the inclusion of such slits reduces their axial capacity. The literature contains limited experimental studies on the axial capacity of these studs with slits, and no non-linear elasto-plastic finite element studies have been reported. This research aims to address this gap. Non-linear elasto-plastic finite element models were developed and validated against experimental test results. A parametric study consisting of 960 finite element analysis (FEA) models was then conducted, covering the effects of different channel dimensions, slit sizes, section thicknesses, and stud lengths. Ultimate axial capacities obtained from these analyses were compared to the current codified direct strength method (DSM) predictions as per the Australian/New Zealand Standard AS/NZS 4600. Finally, design recommendations in the form of strength reduction factors are proposed. Based on these recommendations, modified DSM design equations with a reliability index above 2.5 are presented. • Cold-formed steel channel sections with slits under compression were investigated. • The results of a total of 960 new finite element analyses were reported. • The prediction accuracy of the current available design guidelines was evaluated. • Design equations in the form of an axial capacity reduction factor were proposed.
Source: Engineering Structures
Institutions: University of Waikato, University of Auckland
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,440
OpenAlex ID: W4403465682