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Design of cold-formed stainless steel lipped channel sections with web openings subjected to web crippling under end-one-flange loading condition

Yousefi, Amir M and Lim, James BP and Uzzaman, Asraf and Lian, Ying and Clifton, G. Charles and Young, Ben (2016) Design of cold-formed stainless steel lipped channel sections with web openings subjected to web crippling under end-one-flange loading condition. Advances in Structural Engineering. ISSN 2048-4011

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    Abstract

    This article presents a numerical investigation on the web crippling strength of cold-formed stainless steel lipped channel sections with circular web openings under end-one-flange loading condition. In order to take into account the influence of the circular web openings, a parametric study involving 1992 finite element analyses was performed, covering duplex EN1.4462, austenitic EN1.4404 and ferritic EN1.4003 stainless steel grades; from the results of the parametric study, strength reduction factor equations are proposed. The web crippling strengths predicted by the reduction factor equations are first compared to the strengths calculated using the equations recently proposed for cold-formed carbon steel lipped channel sections. It is demonstrated that the strength reduction factor equations proposed for cold-formed carbon steel are unconservative for the stainless steel grades by up to 7%. Unified strength reduction factor equations are then proposed that can be applied to all three stainless steel grades.