Investigation on the behaviour of cold formed steel latticed built up beams

Abstract

In steel construction hot rolled members and cold formed members are the two main families of structural members Even though cold formed structural members are less familiar it has a growing importance relative to the traditional heavier hot rolled steel structural members Steel products are extensively used in building industries such as bridges roof trusses transmission line towers multi storied buildings etc Because of its high strength to weight ratio Cold Formed Steel member results in the reduction of deadweight newlineThis study is aimed at developing an innovative latticed cold formed steel beam by utilizing the advantages of lacing and cold formed steel to enhance flexural capacity at minimum fabrication cost The latticed hot rolled section beams are in existence and they are widely used in industrial sectors In this research an attempt has been made to use similar type of latticed beam just by replacing the hot rolled section by cold formed steel sections This study therefore involves investigations into flexural behaviour of latticed beams comprising various steel grades steel thickness section sizes and span to fully understand the primary buckling and ultimate failure characteristics newline newline