Behaviour of Cold Formed Steel Sigma Purlins Using ANSYS

E.Manikandan , S.Janani, Dr.R.Thenmozhi

Abstract

Popularity of the Cold-formed steel is increasing in the recent years due to the high strength of weight ratio. The performance of the Cold Formed Steel (CFS) sections is affected due to various buckling modes. To overcome this limitation, the Webs are stiffened by means of intermediate stiffeners. Stiffeners in the web of the C-section increase the local buckling stress, distortional buckling stress of the section.In the present investigation, two different forms of purlins were studied numerically. The web stiffened channels named as Sigma section is used as a purlin and their effects is analysed using a commercially available Finite Element Software ANSYS 14.0. Two boundary conditions with open and closed distortional buckling restraint around the edges were assumed for analysis. Specimens are non-linearly analysed in simply supported condition for three varying d/t ratio. The stress and deformation contours were plotted to determine the yield load and ultimate load.