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Design of Monosymmetric Sections in Flexure

by Duane S. Ellifritt, Univ of Florida, Gainesville, United States,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

Monosymmetric members are generally I-shaped, symmetrical about the plane of the web, and characteristically have a larger compression flange than tension flange. Examples are crane girders made of a W-shape with a channel cap cover-plated beams, and the three-plate welded beams found in metal building systems. The most extreme case of monosymmetry is the WT section. Such sections have shape factors larger than doubly symmetric sections and therefore have more reserve capacity between first yield and the formation of a plastic hinge. The purpose of this paper is to present a realistic design procedure for these sections. The main emphasis is on those members welded together from three plates, W-shapes with channel caps, or W-shapes with cover plates.

Subject Headings: Structural analysis | Plastic hinges | Welding | Symmetry | Steel structures | Steel plates | Steel construction

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