Naaim, Nurfarhah and De’nan, Fatimah and Choong, Kok Keong and Azar, Faiz
(2016)
Finite Element Analysis of Lateral Torsional Buckling
Behaviour of Tapered Steel Section with Perforation.
MATEC Web of Conferences, 47 (02020).
pp. 1-6.
ISSN 2261-236X
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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