Finite element modelling of sheathed cold-formed steel beam–columns

The structural behaviour of sheathed cold-formed steel lipped channel section columns (studs) subjected to combined compression and major axis bending is investigated herein by means numerical modelling. Finite element (FE) models single studs, set in tracks connected oriented strand board (OSB) gypsum plasterboard sheathing under varying combinations axial horizontal loading were developed ABAQUS validated against experimental results reported the literature. incorporated cross-sectional global geometric imperfections, while geometrical material nonlinearities for both considered analyses. Particular emphasis was given replicating “as-built” boundary conditions at ends columns, controlled screws connecting column track column–track contact interaction. interaction between column, as well fasteners two components, also explicitly modelled. Both shear pull-through characteristics simulated based on findings. Following successful validation finite models, parametric studies conducted. showed that substantial performance benefits can be achieved addition members spacing connectors has a strong influence member response. For typical system, decreasing connector from 300 mm 75 found increase stud capacity stiffness up 12% 10% respectively when pure 26% 22% bending; loading, increases 29% found.