Host: The Japan Society of Naval Architects and Ocean Engineers
Name : 2025 Annual Spring Meeting
Number : 40
Location : Ehime Prefectural Convention Hall
Date : May 29, 2025 - May 30, 2025
Pages 489-500
Stiffeners are essential members of ship hull structures composed of stiffened panels，and their scantlingformulaeagainstlateralpressureareimportantfordesigningsafeandrationalhullstructures. Intypicalscantlingformulaeofclassificationsocieties，thereductioninthefullyplasticmomentdueto theshearstressisnotdirectlyconsideredinthecurrentdesign.Inthisstudy，wefirstderivedasimple formulation ofthe shear stress effect with the simultaneous action of an axial stress under agiven stiffenerconfiguration，and showedthat the reduction ofthe fullyplastic moment canbe calculated usingthreenon-dimensionalparameters.Basedontheformulation，wediscussedhoweachparameter contributes to the fully plasticmoment as well as theconditionunder which the shear stress can beeffectively neglected. Subsequently，we used the finite element analysis (FEA) based on the residualdeflectioncriterion，therebyverifyingthevalidityofthetheoreticalproposals.Finally，weproposedascantling formula，rationally taking account of the shear stresseffect.
