Article

Azeem M, MACE Kothamangalam; Prof. Dileep Kumar PG ,Calicut University; Prof. Merin Mathews ,KTU

Modern construction industry is aiming at incorporating cost effective, economic, durable and light weight sections in their construction practice. Cold formed steel sections due to its high post buckling strength and the above mentioned qualities have a become a favorite building material among engineers. Hence it is necessary to make an in depth study about the buckling behavior of cold formed steel sections to understand about the most economical design of light gauge sections. Even though studies on individual flexural members like channel sections, lipped channel sections, zed sections have been done there are a very few researches on built-up I sections which is a very important flexural member. In this study, cold formed sections under considerations are built-up I sections. Finite element analyses are used to investigate the web buckling behavior of various cold formed built-up I sections with and without web holes, under interior two flange and interior one flange loading conditions. Sections are made with similar cross sectional areas for comparison. The web holes are located at the mid-depth of the sections with a horizontal clear distance of the web holes to the near edge of the bearing plate. This becomes of great importance to study the effect of web holes on the strength of the sections so that a better precise design and economy can be maintained.