ウェブの変形を伴うI形断面材の非弾性曲げねじれ座屈強度

概要

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This paper presents an analysis of inelastic flexural-torsional buckling of I-section members in due consideration of the effects of web distortion. By extending the instability theory formulated by Vlazov for thin-walled members to flexural-torsional buckling of I-section members with flexible web, equations governing the problem are derived. A procedure of numerical evaluation of flexural-torsional buckling strength is demonstrated for the simply supported I-beams with typical patterns of residual stress distribution, loaded by uniform bending into the elasto-plastic range. Numerical results in the form of buckling curves, evaluated by the present method, show that the effects of web distorsion considerably reduce the elasto-plastic buckling strength as well as the elastic buckling strength in cases of the beams with particular cross-sectional proportions.
山梨大学の論文