Vol. 16, No. 3, pp. 272-278 (2020)
INFLUENCE OF DIFFERENT SHAPES OF GEOMETRIC IMPERFECTIONS ON THE
STRUCTURAL BEHAVIOR OF BEAMS WITH LARGE WEB OPENINGS
Teixeira F. B. *, Caldas R. B.and Grilo L. F.
Federal University of Minas Gerais, Belo Horizonte, Brazil
*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 8 October 2019; Revised: 7 June 2020; Accepted: 22 June 2020
DOI:10.18057/IJASC.2020.16.3.8
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ABSTRACT
This paper explores the influence of four different shapes of geometric imperfection upon the collapse of castellated and cellular beams. A numerical model developed in ANSYS and calibrated against experimental results was used to investigate the effects of each imperfection shape. The global imperfection (weak-axis bending) did not affect web-post stability. Web-post bending favored the development of plastic yielding, while web-post misalignment and the local buckling mode strongly compromised web-post stability. The choice of imperfection shape was shown to determine the failure mode of the beams, directly affecting the quality of the numerical results and potentially influencing design decisions.
KEYWORDS
large web opening, geometric imperfection, numerical analysis, web-post buckling, lateral-torsional buckling
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