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Web crippling design of cold-formed duplex stainless steel lipped channel-sections with web openings under end-one-flange loading condition

Yousefi, A.M. and Lim, J.B.P. and Uzzaman, A. and Lian, Y. and Clifton, G.C. and Young, B. (2016) Web crippling design of cold-formed duplex stainless steel lipped channel-sections with web openings under end-one-flange loading condition. In: 11th Pacific Structural Steel Conference, 2016-10-29 - 2016-10-31, Crowne Plaza Shanghai.

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Abstract

Cold-formed stainless steel sections are becoming more widely used in the residential and commercial sectors due to their high corrosion resistance and high strength-to-weight ratio. However, their susceptibility to web crippling at points of concentrated loading is well-known to be an important design issue. In addition, web openings are also become popular, as they improve ease of installation of services. This paper presents the results of an investigation into the effect of web crippling on cold-formed duplex stainless steel lipped channel-sections, having such openings, under the end-one-flange (EOF) loading condition. 728 non-linear elasto-plastic finite element analyses are undertaken, with web openings located either centred above the bearing plate or offset to bearing plate. The effect of the size of the web opening, length of bearing plate and location of the web opening is considered. Strength reduction factor equations are proposed, that can be used to take into account such openings in design.