Computer · Design of Steel Structures
A mono-symmetric I-beam is subjected to uniform bending. Why does its lateral-torsional buckling (LTB) resistance increase when the larger flange is placed in compression?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The Shear Center and Centroid coincide
- 2The Wagner Effect (J-parameter) increases the torsional stiffness✓
- 3The increased moment of inertia about the minor axis (Iy) dominates the Euler formula
- 4The warping constant (Cw) is minimised
Correct answer
The Wagner Effect (J-parameter) increases the torsional stiffness
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