DEFLECTIONS OF PERFORATED BEAMS WITH CIRCULAR OPENINGS

Abstract

The paper presents the problem of deflection identification of perforated I-beams under the distributed load using the theory of compound bars and the finite element method. The comparative analysis is performed for the values under study at given perforation parameters. The analytical dependence is used to determine coefficients on the basis of beam deflection design using the finite element method. This method is difficult to apply due to the stiffness ratio obtained for the elastic layer formed by straight arches. The maximum cost reduction and weight of the structures leads to the decrease of the relative width of straight arches and increase of relative height of perforated holes. Moreover, the I-beam technology allows varying perforation parameters. The stiffness ratio is detected by numerical calculations of rolled section I-beam using the program package ANSYS. Experimental results are in good agreement with the finite element method.