International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Comparative Study on Distortional Buckling Strength of Cold-Formed Steel Lipped Channel Sections

Author Affiliations

  • 1Vijayasimhan M, Marimuthu V., Palani G.S. and Rama Mohan Rao P.
  • 2 CSIR-Structural Engineering Research Centre, Chennai, INDIA VIT University, Vellore, INDIA
  • 3
  • 4

Res. J. Engineering Sci., Volume 2, Issue (4), Pages 10-15, April,26 (2013)


Usage of cold formed steel structural components for buildings and structures is gaining popularity in India for a decade. Hot rolled steel member behaviour and design are well developed, whereas the cold formed steel member behaviour and design is not developed fully compared to the rest of the world. The Indian code for cold-formed steel design, IS 801 was revised during 1975, which is in line with 1968 edition of AISI standard. Bureau of Indian standards is in the process of revision of IS 801 to catch up with the latest developments and design methods with the other codes of practices in the world. As a background for the development of codal provisions, the design provisions developed in the various codes of practices have been reviewed and a comparative study has been carried out on design flexural strength of cold formed steel lipped channel sections. For this purpose, experimental results are collected from the literature. Based on the comparative study, direct strength method (DSM), which gives flexural strength closer to experimental results has been chosen for further parametric studies. There are several failure modes among which distortional buckling is one such failure mode that affects the strength of the section. In order to assess the influence of distortional buckling, a parametric study has been conducted by varying the lip depth, which is the influencing factor for distortional buckling strength. This paper presents the details of the studies carried out and the conclusions arrived.


  1. Dinar C. and Pedro B.D., Coupled instabilities with distortional buckling in cold-formed steel lipped channel columns, Thin-Walled Structures,49, 562–575 (2011)
  2. Teng J.G., Yao J. and Zhao Y., Distortional buckling of channel beam-columns, Thin-Walled Structures,41, 595–617 (2003)
  3. Tadeh Zirakian, Hossein Showkati, Distortional buckling of castellated beams, Urmia university, J. of Cons Steel Re.,s62, 863–871(2006)
  4. Ashkan S. and Yong C.W., Direct Strength Method for calculating distortional buckling capacity of cold-formed thin-walled steel columns with uniform and non-uniform elevated temperatures, University of Manchester, 2012, Thin-Walled Structures,53, 188–199 (2012)
  5. AISI Standard – North American specification for the design of cold formed steel structural members (2007)
  6. Cheng Yu and Benjamin W.S., Simulation of Cold-formed steel beams in local and distortional buckling with applications to the direct strength method,” Johns Hopkins University, J. of Constructional Steel Research63, 581–590 (2007)
  7. BS: 5950 part 5 - Code of practice for design for cold formed thin gauge sections (1998)
  8. IS: 801 –Draft Code of practice for use of cold formed light gauge steel structural members in general building construction (2010)
  9. Eurocode 3: Design of steel structures, Part 1-3: General rules- Supplementary rules for cold-formed members and sheeting (2006)
  10. Direct Strength method of design AS/NZS 4600 –(2005)
  11. Australian/New Zealand standard
  12. Moreyra and Pekoz., Experiments on lipped channel flexural members, 12th International specialty conference on cold formed steel structures, St. Louis, Missouri, U.S.A., (1994)
  13. CUFSM (V 3.12) – Cornell University Finite Strip Method – Elastic Buckling Analysis of thin walled members by Finite Strip Analysis (2011)