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IntroductionConnection is one of the most important elements in structural components for steelwork. This is because the internal forces and moments at the connection are transferred by the connection from the connected members to other supporting member. The mechanical properties of the connections will have effects on the strength, stiffness and stability of the whole structure. Hence, most of the recent research works were focussed on the behaviour of the connection. For multi-storey buildings, the type of connections between the main structural elements which are usually classified as beam-to-column connections, beam-tobeam connections, column splices, column bases and bracing connections. However, the most common type of connections used in the research is the beam-to-column connection.
Abstract. This paper presents the finite element analysis of lateral torsional buckling of tapered steel section with perforation. The numerical analysis consists of four main models with a ratio of tapering 0.3 for 3.5m and 5.5m span and ratio of tapering 0.5 for 3.5m and 5.5m span. This study has 94 models in order to investigate the effect of thickness and the openings on the buckling moment. LUSAS software was used to carry out the finite element analysis to study the effect of web opening on the buckling behavior which had five variables such as thickness of web and flange, opening size, ratio of tapering, and opening arrangement. The opening size from 0.2D to 0.4D is recommended because buckling moment capacity difference only around 2% was observed for the opening size exceeds 0.4D. Ratio of tapering 0.3 and ratio of tapering 0.5 was observed increase with the web opening area. The deformation patterns are almost similar for the different sizes of web openings and ratio of tapering. Based on the finite element results, tapered steel section without perforation has higher buckling moment capacity. The comparison of the buckling moment between non-perforated sections with the recommended section is around 2% to 4%.
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