NUMERICAL INVESTIGATION ON BEHAVIOUR OF COLD-FORMED STEEL BUILT-UP COLUMN WITH WEB PERFORATIONS

T, DYANESH; M, RAMA; C, KARTHIK

doi:10.22059/ceij.2025.376568.2061

NUMERICAL INVESTIGATION ON BEHAVIOUR OF COLD-FORMED STEEL BUILT-UP COLUMN WITH WEB PERFORATIONS

Articles in Press

Authors

¹ STRUCTURAL ENGINEERING, PG STUDENT, GOVERNMENT COLLEGE OF TECHNOLOGY, COIMBATORE, TAMILNADU, INDIA

² STRUCTURAL ENGINEERING, ASSOCIATE PROFESSOR, GOVERNMENT COLLEGE OF TECHNOLOGY, COIMBATORE, TAMILNADU, INDIA

³ CIVIL ENGINEERING, VELALAR COLLEGE OF ENGINEERING AND TECHNOLOGY, ERODE, TAMILNADU, INDIA

10.22059/ceij.2025.376568.2061

Abstract

Cold-Formed Steel (CFS) channel sections are increasingly being employed in structures to handle weights-to-strength ratio. The web perforations are often punched to limiting their size and reduce the section weight to some extent. Back-to-back CFS lipped channels with edge-stiffened holes are an innovative kind of structural element, to be more efficient than regular CFS channels with unstiffened holes. This study delivers the findings of 15 parametric results on the axial strength of back-to-back lipped channels with edge-stiffened holes, un-stiffened holes and plain webs. Nonlinear elastoplastic finite element model was analyzed and it agreed well with the test results. When compared to a back-to-back lipped plain channel section, a built-up lipped channel section with seven edge-stiffened web apertures displayed a better improvement in compression resistance and the same section with the same number of unstiffened web openings experienced a significant reduction in compression resistance. The design strength of the sections was calculated through BS5950-5:1998 and assessed. By incorporating seven edge-stiffened web perforations, there was 10% decrease in the overall size of the member, enabling weight reduction without compromising major structural integrity. Web perforated sections are reduced the structural weight; it may reduce the shear resistance caused by wind and seismic effect.

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