International Journal of Engineering and Technology

This paper is focused on the investigation behavior of shear strength of castellated beam with and without stiffeners. Castellated beams are steel beams with web openings and they gain its advantage due to its increased depth of section without any additional weight. However one consequence is the presence of web opening which leads to various local effects like shear and deformation.
In this paper steel I section ISMB 150 and ISMB 200 is selected and castellated beams are fabricated such that depth of the beam is 1.5 times greater than the original depth. The beam is analysed using Finite Element Analysis (ANSYS 14).Two point loads is applied and stress distribution is studied. Stress concentration increases at the hole corners along the shear zone and at load application point. Deflection of the beam with and without stiffeners is studied. And stiffeners are introduced diagonally on the web opening along the shear zone, and in the other case stiffeners are provided on the solid portion of the web along the shear zone.
From the results obtained from ANSYS14 it is concluded that shear strength of castellated beam can be improved by providing diagonal stiffeners along the web opening. Also it is concluded that stiffeners provided on the opening of the web is more effective than stiffeners provided on the solid portion of the web