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Low and high shear

The shear verification affects bending and axial resistances according to EN 1993-1-1. The "low shear" is defined by the following condition:

Where is:

VSd

  • The shear force

Vpl,Rd

  • The shear resistance

Otherwise, "High shear" appears. If there are shear shear forces due to torsion in the cross-section, the value of resistance Vpl,T,Rd (reduced value due to torsion, described in the chapter "Shear stress due to torsion") is used instead of the resistance Vpl,Rd. The design values of the axial and bending resistances are reduced for "High shear". The reduction is based on the reduction factor for yield strength according to the following formula

Where is:

ρ

  • The reduction factor making an allowance for the presence of shear forces

fy

  • The yield strength

The reduction factor ρ is given by formula

or by the expression

for shear due to torsion

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