Influence of lateral pressure on load-shortening behavior of stiffened panels under combined loads

摘要

During the operations of ship and ship-shaped offshore structures, they are subjected to combined lateral pressure and in-plane stresses. However, the effect of the lateral pressure is often ignored in ultimate strength assessments, particularly in the hull girder ultimate strength analysis. This paper presents a systematic numerical investigation on the influence of the lateral pressure on nonlinear collapse behavior of stiffened panels subjected to combined in-plane stresses. The present results indicated that the effects of pressure on the ultimate strength depend on the ratio of the longitudinal and transverse stresses and the collapse loads are more sensitive to pressure when the external loads are dominated by longitudinal stress. Numerical examples and findings from this study are discussed.