Ultimate Strength of Longitudinally Stiffened Plate Panels, Subjected to Combined Axial and Lateral Loading

摘要

The report presents results of an analytical investigation of the ultimate strength of longitudinally stiffened plate panels. The load considered were the axial load applied to the ends and the hydrostatic pressure acting on the plate surface. Under these external loads, longitudinally stiffened plate panels fail due to excessive bending and can be treated as beam-columns if local buckling of the plate components is prevented. The analysis was performed by solving the equilibrium equations numerically. Consideration was given to the non-linear effects of both the inelastic action and deformation. The factors which have an effect on the ultimate strength were found to be: (a) Yield stress of material, (b) Residual stresses in both magnitude and distribution, (c) Ratio of stiffener cross-sectional area to plate area, (d) Ratio of stiffener flange area to stiffener area, (e) Ratio of stiffener depth to plate thickness, (f) Intensity of hydrostatic pressure. In the nondimensionalized Ultimate Axial-Load--Lateral Load-- Panel Length relationship, the interelation between these geometric ratios was found to be practically negligible. (Author)