This thesis deals with the shear resistance of thin-walled steel I-sections and the interaction between shear and bending. In I-sections, most of the shear load is carried by the web, which is often slender and susceptible to shear buckling. The thesis analyses the shear resistance according to the current standards SIST EN 1993-1-1 and SIST EN 1993-1-5 and compares it with the shear resistance according to the upcoming new generation of standards. The key changes in the shear resistance of cross-sections introduced by the two new standards are highlighted. Finally, worked examples for different cross-section classes are presented using the equations from the new standard.
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