Steel Design - New Design for High Shear in Combined Bending & Axial Check - Eurocode EC3 All NA’s

Added September 16, 2020 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
Tekla Structural Designer 2020

Steel Design - New Design for High Shear in Combined Bending & Axial Check - Eurocode EC3 All NA’s

Steel Design - New Design for High Shear in Combined Bending & Axial Check - Eurocode EC3 All NA’s

Previously beyond scope in steel beam design, design for high shear in the combined bending and axial check is now checked. The new calculations have been based on Eurocode EC3 part 1 and also with reference to the research paper ‘Resistance of steel cross-sections subjected to bending, shear and axial forces’ by Jerzy Goczek and Lukasz Supel, Engineering Structures 70 (2014) 271-277, Elsevier.

  • No additional input is required for the new check - valid beam members which satisfy the load condition requirements will automatically be designed for high shear where this exists. The new check is considered in the autodesign routine thus sections failing the check will not be selected and further section sizes will be attempted.

  • The scope of the new check is as follows:

    • Members: doubly symmetric rolled or plated I section beams

    • Loading: uniaxial major bending and axial force with major axis high shear is the only condition for which high shear will be designed

      • Note the presence of torsion force (above the ignore torsion force level) will not be a valid load condition for the high shear check, regardless of whether ‘check for torsion’ is ticked on or off, and will result in Beyond Scope status

      • Note that where the shear web buckling exceeds 50% of capacity, this will not be a valid condition for the high shear check, hence will result in Beyond Scope status.

  • A new warning will be displayed in each of the three buckling checks when high shear is present (including minor axis high shear and for non-valid members and loading conditions). This states that buckling design is assumed to be unaffected by the presence of high shear (which is not explicit in EC3 but mirrors the statement in BS5950 clause 4.8.1).

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