Reliability-Based Optimum Design of a Square Box Column Constructed from Cellular Plates

Cellular plates can be calculated as isotropic ones, bending moments and deflections being determined by using the classic results for various loads and support types. A cantilever stub column of a square box section composed of welded cellular plates is optimized. The column is subject to compression and bending and is constructed from four equal cellular side plates. The constraints on overall buckling are formulated according to the Det Norske Veritas design rules. The horizontal displacement of the column top is limited. The cost function to be minimized includes the costs of the materials, assembly, welding and painting.