Structural performance of cold-formed Steel channel joist with web openings subjected to bending

Abstract

This study investigates the structural behaviour of a cold-formed steel channel joist subjected to bending. Channel joists with or without web opening were considered. Web-opening types, such as circular and square were considered. Channel joist selection for this investigation was performed on the basis of a section frequently used in construction practice. Two different heights of the joists were considered. The significant factors that influence the performance of joists subjected to bending were examined. An analytical investigation was conducted on the experimental models considered. Analytical investigation was performed using ANSYS16.2 APDL software. Thus, significant factors that influence the performance of joists subjected to bending were identified. Specifically, the maximum load-carrying capacity, load –deflection relationship and stiffness these were taken as influence factors and discussed. As a continuation of this study, a comparison of the experimental and analytical results was performed. The analysis results revealed that when joists with different web openings were observed. The circular type exhibited better performance than the other web-opening types. The circular shape generally falls under the economic cross-section category and has a good shape factor. Thus, joists with this type of web opening exhibited high stiffness and low deflection value.