Numerical Analysis and Validation of Octagonal Castellated Steel Beams with Circular and Octagonal Ring Stiffeners

摘要

Steel structure are employed in heavy industrial building to provide good strength and also carry tonnes of loads safely. Recently uses of castellated beam with different profile is increasing due to its good vertical bending stiffness, high weight ratio and high strength. The objective of the thesis is to strengthen the castellated beam with the application of extended plate and circular and hexagonal stiffener. The virtual CAD model of the I section beam is prepared with the help of standard sectional profile of IPE 140. FEM results guide us to the find out the stress and deflections in the existing parent beam and validate the result with experimental result. In order to reach the most optimum design of beam, several models in the form of different profile castellated were tested on the basis of ultimate strength and the most optimum design was selected. Based on the satisfaction of different factors in the form of load bearing capacity, stress induced and deflection the optimum selection of beam was performed.....