Analyse des contraintes locales dans les poutres a ouvertures d’ames

الملخص EN

In the steel frame building, it is common of beams with openings in the web designs to increase the inertia-material ratio and to allow the passage of service shafts.

The justification for such beams must take into account the presence of these openings by applying appropriate verification methods.

The finite element model developed on software CAST3M can evaluate failure modes by collapse by yielding or local buckling of the walls around the openings of various shapes by Vierendeel bending.

Numerical results are used to understand the mechanical behavior of these beams and the effect of these openings on the resistance of the beam.

The types of loadings, distribution and shape of openings greatly affect the results.

With the results of the analysis it is possible to observe that the finite element method and those of the Vierendeel bending method provide similar results with the exception of the areas near the corners of the openings.

In the case of the application of a constant bending moment we see that the Vierendeel method is not effective then we must use the equivalent method.

Two analytical methods are used and their results are between themselves and with those of the numerical simulations that led to identical results were almost all types of shaped openings but still a large difference remains between these types of openings.