Abstract
Recent advances in the production of perforated steel profiles have given rise to the emergence of new opening patterns, among which the sinusoidal pattern stands out. Profiles manufactured with this type of opening are usually used to overcome large free spans and they have a cross-section height considerably higher in relation to the plain-webbed profile that originates them. Due to this, profiles of this nature are more susceptible to failure by lateral-torsional buckling. However, not enough research is found on this type of profile, especially in relation to global instability. In addition, the existing lack of consensus in determining the critical moment in alveolar beams is amplified when considering the openings in a sinusoidal pattern. Therefore, the present work consisted of a numerical evaluation of the elastic stability behavior of these elements through ABAQUS software, in which an extensive parametric study was developed with 15,205 finite element models. Through the parametric study, it was possible to evaluate the influence of several geometric parameters of these beams in the critical moment, as well as to propose an analytical calculation method suitable for beams with sinusoidal openings, considering different loading conditions, which showed excellent compliance with the numerical results.
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