Due to the function to prolong the heat transfer route between one side of the member and the other side

the slots in the webs of cold-formed thin-walled steel members can reduce the bridge effect notably.At ambient

the failure modes of cold-formed thin-walled steel members are very complex

including global buckling

local buckling and distortional buckling.Different failure modes can interact on each other.The failure modes of cold-formed thin-walled steel members will be much more complicated in fire.So it’s difficult to get its critical load by using the general stability theory.The authors take use of the finite element method to investigate the mechanical properties of cold-formed thin-walled steel members in fire

taking the factors of element type

material model

initial geometric imperfection magnitude and solution scheme into consideration.At meantime this article offers some advice on the computational modeling of cold-formed thin-walled steel members for fire-performance analysis.