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Effect of stiffeners in Lean Duplex Stainless Steel (LDSS) hollow circular stub columns under pure axial compression

Abstract

The present study is an attempt to study the effect of various geometrical stiffeners parameters in the critical/ultimate buckling load capacity of circular Lean Duplex Stainless Steel (LDSS) stub column loaded axially using finite element (FE) analysis, through Abaqus (2009). The effect of increase in number of stiffeners (Ns), thickness of stiffener and width of stiffener were studied on the critical buckling load capacity. Based on the FE analyses, an increase of buckling load capacity has been observed with increasing number of stiffeners. The increase of buckling load followed a nearly linear trend. The buckling load for the stiffened column in comparison to the unstiffened column, increases from ~ 120 % to 180 %, when Ns (number of stiffeners) is increased by 500% from Ns = 4. An increase of buckling load capacity has also been observed for both increasing in thickness and width of the stiffeners.

Gowtham Sriram Vetsa, Konjengbam Darunkumar Singh

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