A CONTRIBUTION TO THE BUCKLING ANALYSIS OF STIFFENED RECTANGULAR ISOTROPIC PLATES (original) (raw)

2018, 1st International Civil Engineering Conference (ICEC 2018) Department of Civil Engineering Federal University of Technology, Minna, Nigeria

In this research paper, buckling analysis of stiffened rectangular isotropic plates elastically restrained along all the edges (CCCC), using work principle approach that is based on polynomial function were carried out. The stiffeners are assumed to be rigidly connected to the plate, such plates are widely used in civil engineering, marine, and aeronautic structures. Analysis for critical buckling of stiffened plates possessing different aspect ratios, varying stiffness properties and varying number of stiffeners were carried out. The governing differential equation for the stiffened plate system was obtained by super position principle. Polynomial functions were used in this study and the present analysis was carried out only for uniaxially stiffened plate, where longitudinal stiffeners are presented parallel to inplane load of the plate. Effects of the number of stiffeners, aspect ratios, boundary conditions, stiffener parameters upon the buckling coefficients, K of the stiffened plates were investigated. The results were obtained considering the bending displacements of the plate and the stiffener for all edge clamped conditions presented. Maximum percentage increase in buckling coefficients of stiffened plates for the case of one and two stiffeners is 20.586%. For the case of one and three stiffeners, the maximum percentage increase in buckling coefficients recorded is 48.2257%. Several numerical examples were presented to demonstrate the accuracy and convergence of the current solutions.