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Publication
Numerical analysis of cellular steel beams failure modes in fire conditions
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Advisor(s)
Abstract(s)
Cellular Beams with long spans are increasingly used in the steel
building constructions and usually are used with openings for technical equipment
and ventilations systems cut in their web. These elements are deeper than
normal rolled sections, with distributed circular openings, or other like squared
or hexagonal, produced by cutting and welding hot rolled steel sections.
Cellular beams in fire conditions may collapse by local buckling instability of
the web-post between the openings, lateral torsional buckling or by Vierendeel
bending at the openings.
This behavior is analyzed and evaluated by a numerical method, using the
finite element method, considering geometrically and material nonlinear simulations.
A parametric analysis is performed for different cellular beams, considering
the variation of: (i) different cross sections; (ii) web post widths;
(iii) hole diameter to the section height ratios and (iv) distance between holes.
Additionally the residual stress influence in the moment resistance is analyzed
considering different distributions.
Description
Keywords
Celliular beams Fire conditions Numerical analysis Global bukling Local bukling Lateral torsional bukling
Pedagogical Context
Citation
Numerical analysis of cellular steel beams failure modes in fire conditions. In Iberian-Latin-American Congress on Fire Safety. Springer. p. 78-92. ISBN 978-3-030-3624