Effect of Triangular Web Profile on the Shear Behaviour of Steel I-Beam

Shear buckling occurred in the instability modes of steel beams when it slender. This paper develops a three-dimensional finite element model using LUSAS 14.3 to study on the effect ofthe triangularsteel beamweb profile (T WP) inshearbuckling behaviourof differentthicknesscompared RI to that of thenormalflatbeam (FW). All specimens are cantilever beam which are fixedat one ends. The flange is constant with variable web thickness. Eigenvalue buckling analysis was used in analysing the buckling load of the flat plate model and triangular web profile (TRIWP). Results showed that the web thickness gave a significant impact on the shear buckling of the TRIWP. In addition, the corrugation thickness of web was also effective in increasing the shear buckling capacity of the profile.