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Verification of shear resistance for built-up cross-sections

Verification of the shear force Vz

If the axis z is perpendicular to the strong axis of the cross-section (this is fulfilled for the most of cases), the shear resistance for the force Vz is calculated in the same way as for solid cross-sections:

Where is:

AV,z

  • The sum of shear areas of all partial cross-sections for the direction z

fy

  • The yield strength

γM0

  • The partial safety factor

The final verification is done according to the following expression:

Verification of shear resistance Vy

The force Vy is usually parallel to the strong axis of the cross-section. It means, that the shear resistance depends on the stiffness of battens. This behaviour affects the bending resistance (chapter "Verification of axial resistance for built-up cross-sections"), buckling (the chapter "Verification of buckling resistance of built-up cross-sections") and the verification of battens and lacing (the chapter "Verification of connection in built-up members").

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