Elastic local buckling strength of stiffened plate considering plate/stiffener interaction and welding residual stress

• Published in: Marine structures Vol. 12; no. 9; pp. 543 - 564
• Main Authors: Fujikubo, Masahiko, Yao, Tetsuya
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 1999
• Subjects: Biaxial thrust; Buckling; Buckling strength formula; collapse; elasticity; Marine; Mathematical models; Plate/stiffener interaction; Plates (structural components); Residual stresses; Rigidity; Stiffened plate; Stiffness; Strength of materials; Stress analysis; Structural analysis; Welding; Welding residual stress; Stiffened plate; Plate/stiffener interaction; Buckling strength formula; Welding residual stress; Biaxial thrust
• ISSN: 0951-8339; 1873-4170
• DOI: 10.1016/S0951-8339(99)00032-5

An analytical formula for estimating elastic local buckling strength of a continuous stiffened plate subjected to biaxial thrust is derived considering the influence of plate/stiffener interaction and welding residual stresses. Through a comparison of calculated results with those by FEM eigenvalue analysis, high accuracy of the proposed formula is demonstrated. A series of buckling strength analyses is performed on the deck and bottom plating of actual ships. It has been found that: (1) In the case of stiffened plates in ordinary ships, an increase in the elastic local buckling strength as a result of stiffener torsional rigidity is almost compensated for by the influence of welding residual stresses. (2) For a thin plate under transverse thrust, higher elastic buckling strength can be expected than that specified in the classification societies’ rules by selecting an appropriate size for the stiffener.