Previously beyond scope in steel beam design, design for high shear in the combined bending and axial check is now checked in Tekla Structural Designer 2020. 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.
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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.
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The scope of the new check is as follows:
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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).