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What will happen when d/tw is sufficiently low?

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in Design of Steel Structures by (962k points)
What will happen when d/tw is sufficiently low?

(a) web will yield under buckling before shear

(b) web will yield under shear before buckling

(c) web will not yield under shear

(d) web will not yield under both shear and buckling

The question was posed to me at a job interview.

I would like to ask this question from Web Panel Subjected to Shear in section Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

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The correct choice is (b) web will yield under shear before buckling

Best explanation: When d/tw ratio is sufficiently low, the elastic critical stress increases above the value of yield shear stress and the web will yield under shear before buckling.

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