Analytical Equations for Critical Local Buckling Stress of Lipped Channels
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Date
2023-05
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Abstract
The objective of this study is to develop accurate analytical equations for calculating the critical local buckling stress of lipped channels with or without punchouts under compression and bending. Finite strip analysis is conducted on over 1000 lipped channel sections under four different loading conditions. Simple polynomial ratio equations are fit to the finite strip analysis results. The performance of the developed expressions are compared against the finite strip analyses and the element method currently provided in the AISI S100 Specification. The developed expressions are intended for use by engineers in future versions of the AISI S100 Specification.
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cold-formed steel, elastic buckling, members with holes, analytical expressions