Date of Publication :7th October 2016

Abstract: Two types of structural steel members are being used, namely hot rolled steel and cold formed steel. The use of thinwalled, cold-formed high strength steel products in the building industry has significantly increased in recent years. These products are being widely used in various applications such as purlins, girts, portal frames and steel framed housing The performance of the Cold Formed Steel (CFS) sections is affected due to buckling mode involving flexural-torsional buckling and local buckling, distortional buckling, overall buckling and their interactions, which are invariably important facets of Cold Formed Steel sections. It is therefore important that these buckling modes are either delayed or eliminated to increase the ultimate moment capacity of the CFS sections. To overcome this limitation, the webs are stiffened by means proper bending on it. Stiffeners in the web of the Csection increase the local buckling stress, distortional buckling stress of the section. Due to the stiffeners, more distortional buckling modes occur in the section. In the present numerical investigation, web of the Cold Formed Lipped ‘C’ section are stiffened by means of proper bending, these web stiffened lipped channel section named as sigma section used as a purling and their effectives is analyzed using a commercially available Finite Element Software ANSYS 12.0. Specimens are modeled analyzed in simply supported coition for varing h/t ratio and d/t ratio and Von-Misses stress and strain variations, displacement were found. This is followed by determination of the load carrying capacity using ANSYS and compared with experimental results.

Reference :