A New Approach for Estimating the Critical Buckling Load Coefficient of Perforated Steel Square Plates

Abstract

In this study, practical formulas for the critical buckling loads of simply supported square circular perforated steel plates with different hole ratios and slenderness ratios subjected to uniaxial and biaxial load conditions are developed. Database is composed with the help of the commercial software package ANSYS that use the finite element method (FEM) for calculations and the formula was developed by using Gene Expression Programming (GEP). A total of 847 data sets were generated and they used to establish and validate the formula. The effect of perforation size and slenderness ratio on the buckling strength of the perforated plates is investigated with this study. The critical buckling loads for the simply supported perforated square steel plates could be calculated easily via the critical buckling coefficients of the developed formulas. One of the novelty of this research study is unique buckling coefficients can be calculated for each slenderness ratio. After the evaluation it has seen that the results from the formulas are much more acceptable out of the results of the available literatures.