Consider the below statements with respect to plate girders and identify the correct answer.
Statement A : The intermediate transverse stiffener increases the buckling resistance of web
caused by shear.
Statement B: When the computed shear stress in the web of a plate girder is less than the
critical shear stress, intermediate stiffeners are theoretically not required
Statement A – Correct
Intermediate transverse stiffeners divide the web into smaller panels. This reduces the panel aspect ratio and significantly increases the critical shear buckling stress of the web, thereby enhancing its resistance to shear buckling.
Statement B – Correct
If the actual (computed) shear stress in the web is lower than the elastic critical shear stress of the unstiffened web, the web will not buckle under shear. In that case intermediate transverse stiffeners are theoretically not required (only load-bearing/end stiffeners may still be needed).
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