Response and Strength of Intermediately Stiffened Cold-Formed Steel Lipped Channel Columns Formed from 100 ksi (690 MPa) Steel

The main objective of this paper is to summarize findings of recent axial compression tests on a cold-formed lipped channel section with multiple intermediate longitudinal stiffeners in the web, a single longitudinal stiffener in the flanges, and return lips formed from high strength low-alloy steel with a yield strength of 100 ksi (690 MPa). The studied section has potential application as driven piles intended to provide support for solar array installations. The paper also provides a complete analysis of the elastic stability of the section, compression test results at three different lengths, material test results, comparison with a study investigating the axial compressive strength of advanced high-strength steel (AHSS) members, and comparison with available strength design predictions.

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