Optimum linear buckling analysis of longitudinally multi-stiffened steel plates subjected to combined bending and shear

摘要

In this paper, the optimum positions of multiple (two) longitudinal stiffeners for steel plates subjected to pure bending, and combined bending and shear forces, are investigated by using the gradient-based interior point optimization algorithm. An eigenvalue analysis is performed by means of the finite element method, and an optimization algorithm is employed to maximize the buckling coefficients until attaining the optimum position of the stiffeners under various loading conditions. In order to ensure the accuracy of the method, the results obtained from this research are compared with analogous results found in the literature. Based on this study, the optimal location of a single and two longitudinal stiffeners are recommended for plates under pure bending. In addition, the interaction curves between the optimum stiffener location and bending-shear ratio for plates subjected to combined bending and shear forces are proposed for practical design.