When slender columns amplify axial‑flexural interaction, what paired mechanisms govern capacity checks beyond squash load alone?
Choices
- (A) Increasing shear ignoring flexure
- (B) Second‑order amplification of bending under axial thrust (P‑delta effects)
- (C) Steel corrosion unrelated to stiffness
- (D) Axial-only capacity regardless of slenderness
Correct answer: (B)
Second‑order amplification of bending under axial thrust (P‑delta effects)
Explanation
P‑delta couples axial load with amplified curvature.