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← TechnologyWhich bending failure occurs when compressive stress exceeds local strength in a steel I-beam?
A)Lateral-torsional buckling initiates✓
B)Web crippling deformations increase
C)Flange yielding plastically develops
D)Shear lag effects dominate
💡 Explanation
Lateral-torsional buckling happens when the compression flange deflects sideways; because the beam lacks sufficient bracing, this torsional instability occurs rather than pure bending. Thus, the compressive stress causes sideways buckling, therefore reducing the I-beam's overall load-bearing capacity.
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