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Bimoment resistance

The stress caused by the bimoment is calculated with the help of elastic theory. Therefore, these cross-sections are automatically designed as classes 3 or 4. The resistance is calculated in four points (corners of the cross-sections), where are the worst results expected. The resistance is calculated using following expression:

Where is:

Iω

  • The sectional moment of inertia

ω

  • The warping coordinate

fy

  • The yield strength

γM0

  • The partial safety factor

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