Design of Steel Structure
The moment-curvature relation at a plastic hinge is

constant moment for all curvatures
constant curvature for all moments
parabolic
linear

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Design of Steel Structure
The sway bracing is designed to transfer

25% of the top panel wind load to bottom bracing
10% of the top panel wind load to bottom bracing
50% of the top panel wind load to bottom bracing
2Vi % of the top panel wind load to bottom bracing

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