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Erschienen in:
2022 | OriginalPaper | Buchkapitel
Evaluation of the Canadian Seismic Design Provisions for Wide-Flange Columns in Steel Moment-Resisting Frames
verfasst von : Abrar Islam, Ali Imanpour
Erschienen in: Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas
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Abstract
This paper evaluates the stability design requirements set by the 2019 Canadian steel design standard for steel moment-resisting frame columns with base flexural plastic hinging through the finite element analysis of square and deep wide-flange columns that are part of a five-story building subjected to ground motion accelerations. The results showed significant local buckling and strength deterioration of deep slender columns compared to square sections, however the new web slenderness limit h/tw = 37 appears to limit strength deterioration and column axial shortening within acceptable ranges at axial loads around 0.15AFy. No columns experienced member buckling even though none of the deep, slender columns met the global slenderness ratio limit Lb/ry = 50 specified by the standard, suggesting the limit may be overly conservative and can be relaxed.