Effective Cross Section of Cold Formed Steel Column Under Axial Compression

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Abstract

The compressive resistance of cold-formed steel (CFS) section may be governed by local, distortional or overall buckling and any apparent interaction between these modes. A new inventive stiffened CFS section is elected in this study, selected cross sections geometries and lengths are chosen such that all the types of buckling modes are met with. Buckling plot is plotted using linear elastic buckling analysis software (CUFSM). Using the test results obtained in the literature, the developed finite element model is calibrated and furthers a total of 126 parametric study is conducted such as a consequence of dimensions and the length of the cross section, thickness and yield stress. The FEA included relevant material and geometric imperfections. All the columns are analyzed under pin end conditions with axial compression. The analysis results demonstrate that the DSM equations generally assess the strength of stiffened section conservatively. Modifications to the DSM equations are recommended to evaluate the strength of stiffened section more precisely.

Keywords

Buckling Cold-formed steel Compression member Direct strength method Finite-element analysis 

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Copyright information

© The Institution of Engineers (India) 2018

Authors and Affiliations

  1. 1.Department of Civil Engineering, Centre for SONA Structural Engineering ResearchSona College of TechnologySalemIndia
  2. 2.Department of Civil EngineeringK.S.Rangasamy College of TechnologyNamakkalIndia

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