DefinePK

Abstract

The use of cold-formed steel (CFS) structures is increasing due to the advances in manufacturing, construction technologies and relevant standards. CFS has many advantages. However the design of CFS structures is complex because of their thin walled open sections making them vulnerable to torsional-flexural buckling and local buckling. Direct strength method (DSM) is the method available for individual beam and column, with certain limitations. To overcome few such limitations this paper attempts to find some simplified formulae as an extension to DSM for stiffened perforated column and two dimensional frames made from same columns. Already experimented column sections and frames were used for validation. Finite Element Method is used to analysis the column and frame for its load carrying capacity with various parameters. Based on FEM analysis simplified formulae are proposed as an extension to use of DSM for stiffened perforated columns and two dimensional frames.