International Journal of Innovative Research in Advanced Engineering (IJIRAE) ISSN: 2349-2763 Issue 08, Volume 3 (August 2016) www.ijirae.com _________________________________________________________________________________________________ IJIRAE: Impact Factor Value – SJIF: Innospace, Morocco (2015): 3.361 | PIF: 2.469 | Jour Info: 4.085 | Index Copernicus 2014 = 6.57 © 2014- 16, IJIRAE- All Rights Reserved Page -92 Structural Analysis and Design of Castellated Beam in Fixed Action Ajim S. Shaikh 1 Pankaj B. Autade 2 PG Scholar PG Guide Department of Civil Engineering Department of Civil Engineering PDVVP COE PDVVP COE Ahmednagar, India Ahmednagar, India Abstract— The depth is the most important parameter which governs the sectional property of the section. For the serviceability moment of inertia plays very important role and moment of inertia of I-section is directly proportional to the third power of the depth. Research on cellular beams with circular web openings is very limited and is less developed than Cellular beams which may be attributed to the fact that cellular beams are more complicated to analyze due to their continuously changing section properties around the cell. Keyword- structural, Cellular beam, FEA. I. INTRODUCTION Cellular beam have been used in construction for many years. Today with the development of automated cutting and welding equipment. These beams are produced in an almost unlimited number of depths and spans. Suitable for both light and heavy loading conditions. In the past the cutting angle of Cellular beams ranged from 45° to 70° but currently, 60° has become a fairly standard cutting angle. Although 45° sections are also available. It should be noted that these are approximate values. Actual angles will vary slightly from these to accommodate other geometrical requirements. The beam section obtained in such away can be even 50% deeper than the original section by increasing the depth, the section modulus is increased by about 2.25 times the section modulus of original beam section. Thus load carrying capacity of the beam increased by considerably. A Cellular beam has some limitations also viz. stress concentration occurs near the perforations and the shear carrying capacity is reduced. Stress concentration may be reduced by making perforations near the neutral axis where the stresses are small admitting the cut in zigzag way. The shear carrying capacity can be increased by stiffening the web at points of concentrated loads and reaction. The primary advantage of Cellular beams is the improved strength due to the increased depth of the section without any additional weight. However one consequence of the increased depth of the section is the development of stability problems during erection. To fully utilize the engineering advantage of Cellular beams, erection stability must be considered. Cellular beams have been used as structural members in the Europe and the United States since the early 1900’s. The theory behind the Cellular beam is to increase the beam’s depth and strength without adding additional material. Prior to automated cutting and welding technology, the manufacturing process used to make Cellular beams was to cut the beam apart and weld them back together manually. The resistance of Cellular beams is frequently controlled by shearing forces. These forces may cause excessive stresses in the tee-sections above and below the holes excessive stresses at mid-depth of the web-post between holes or web-buckling involving the web-post.[1,2] II. CELLULAR BEAM A) Terminology Throughout this paper various terms will be used to discuss Cellular beam components and testing results. - Web Post: The cross-section of the Cellular beam where the section is assumed to be a solid cross-section. - Throat Width: The length of the horizontal cut on the root beam. The length of the portion of the web that is included with the flanges. - Throat Depth: The height of the portion of the web that connects to the flanges to form the tee section. - Expansion Percentage: The percentage change in depth of the section from the root (original) beam to the fabricated Cellular section.