Question
Download Solution PDFWhich of the following phenomena occurs due to shear strains modifying bending stresses in the flange and causes the sections to warp?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
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Shear lag is a phenomenon that occurs in flanged sections like I-beams and box girders when shear strains modify the distribution of bending stresses.
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It results in non-uniform stress distribution across the flange, causing the edges of the flange to carry less stress than the central region.
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This uneven distribution of stress leads to warping of the section, which is a characteristic effect of shear lag.
Additional Information
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Local buckling: This is related to instability in thin-walled sections under compressive loads, not shear strain modification.
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Web crippling: This is localized failure in the web of the beam due to high compressive loads, independent of shear lag.
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Torsional instability: This is the twisting failure of sections under torque, not related to shear strain modifications in flanges.
Last updated on Jun 7, 2025
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