Abstract
Cold-formed steel members have been widely used in residential, industrial and commercial buildings as primary load bearing structural elements due to their advantages such as higher strength to weight ratio over the other structural materials such as hot-rolled steel, timber and concrete. However, they are susceptible to various buckling modes including local and distortional buckling. Fire safety design of building structures has received greater attention in recent times as fire events can cause loss of property and lives. Therefore it is essential to understand the fire performance of light gauge cold- formed steel structures under fire conditions. The buckling behavior of cold-formed steel compression members under fire conditions is not well investigated yet and hence there is a lack of knowledge on the fire performance of cold-formed steel compression members. Therefore, this paper deals with behavior of cold formed steel compression member under fire and to analyze the effect of fire on critical buckling load of compression member. Eigen value analysis for Lipped channel sections made of various thicknesses and both low and high strength steels was carried out through finite element method. The ultimate load carrying capacity results from experimental investigation and finite element analyses were then compared.
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