International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 08 | Aug-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 163 Structural Analysis and Design of Castellated Beam in Cantilever Action Ajim S. Shaikh 1 ,Prof.Pankaj B. Autade 2 1 PG Scholar, Department of Civil Engineering,PDVVPCOE,Ahmednagar,Maharashtra,India, 2 PG Guide, Department of Civil Engineering,PDVVPCOE,Ahmednagar,Maharashtra,India, ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract – The majority of existing literature on castellated beam is focused on Simply supported analysis, but this paper provides new analytical solution for calculation critical buckling load by the cantilever action. In Simply supported castellated beam the maximum deflection takes place at the mid span of the Beam, but in cantilever castellated beam maximum deflection on the free end. By experimentally it was observed that the value of web shear deformation on the critical buckling load of castellated beam increase with the increase in cross sectional area of the tee section and depth of web opening, but decrease with the length and web thickness. The experimental study of the castellated beam is verified on the cantilever action in the castellated beam the buckling capacity of the web post with fillet corner hexagonal web opening are compared with the circular opening by this opening service pipe can also have passed through this. Comparison Between Castellated Beam and Cellular Beam is executed by different test. A concentrated load or reaction point applied directly over a web-post cause this failure mode, such a failure mode could be prevented if sufficient web reinforcing stiffeners are provided in castellated beam we have to use hexagonal, Square opening and cellular has to kept circular web. Use of Castellated beam for various structure rapidly getting appeal. This happens due to increased depth of section without any addition of weight, high strength to weight ratio, their lower maintenance and painting cost. The limitation of castellated beam is Stress concentration occurs near the perforation and the shear carrying capacity is reduced. Stress concentration may be reduced by making perforation near the neutral axis where the stresses are negligible. Key Words: structural, castellated beam, FEA. 1. INTRODUCTION Cutting and re-welding a solid web steel beam with perforation is a castellated beam not only have higher bending moment capacity but also more effective in terms of passing service wires, pipes and ventilating ducts through opening. Failure of web opening depends on opening shape, opening dimensions, the distance between opening, web post thickness. Modes of Failure - 1. Flexural failure of the section 2. Lateral torsional buckling of beam 3. Local buckling of web or flange 4. Rupture of weld in the web post 5. Vierendeel failure of perforation of section 6. Web post buckling The cutting of castellated beam may be hexagonal, square, circular, fillet corner hexagon. Three group of castellated steel beam were analyzed to show effect of opening shape on the web post buckling behavior. Castellated beam are such structural members which are made by flame cutting a rolled beam along its center line and then rejoin the two halves by welding so that the overall depth is enhanced by 50% to increase structural performance against bending. Reasons for fabricating- a. The increase in sectional height that result in the enhancement of moment of inertia, sectional modulus, stiffness and flexural resistance of the sections. b. Decrease the weight of profile which in turns, cut down the weight of whole structure and economized on construction work. c. There is no need of plate girder. d. The passage of service wires through the web opening Castellated beams are used as a structural member in multistory building, commercial and industrial building, ware house and portal frames. Consequently, various theoretical and experimental studies reported in a deferent failure modes have been identified and investigated Vierendeel collapse mechanism, buckling of a web post, web weld failure, flexural failure, lateral torsional buckling, shear failure. The Vierendeel mechanism can be defined as Dzcontinuous formation of plastic hinges at the ends of four tee sections above and below opening under the combinations of bending moment, local axial force and local shear force.dz The