Flexural-Torsional Stability of Curved Beams

by Chai Hong Yoo, (M.ASCE), Assoc. Prof. of Civ. Engrg.; Auburn Univ., Auburn, Ala. 36849,

Serial Information: Journal of the Engineering Mechanics Division, 1982, Vol. 108, Issue 6, Pg. 1351-1369

Document Type: Journal Paper


General fourth order coupled differential equations are presented to determine the elastic buckling loads of in-plane as well as out-of-plane buckling modes of spatial thin-walled curved beams. Included are the warping contribution to the buckling loads, and the effects of antisymmetry of cross-section (found to be significant). The governing differential equations are based on the variational principle. Critical load formulas are given for a few special combinations of loadings and boundary condition. Comparative studies were made and possible sources of discrepancies were traced.

Subject Headings: Curved beams | Critical loads | Flexural strength | Load combinations | Comparative studies | Coupling | Elastic analysis | Warpage

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