Collapse Behavior of Ship Stiffened Plate Structures under Combined Loads

Abstract

In order to examine the strength of stiffened plate structures, it is important to determine an analyzed region as a local structure. In this paper, to evaluate ultimate strength and post ultimate behavior of ship stiffened plate structures, finite element method is used considering elasto-plastic large deflection effects. Collapse mechanisms of stiffened structures are mainly classified into two collapse modes. One is overall buckling mode which means collapse of both stiffeners and panels. And another is local buckling mode which means collapse of panels or stifeners locally. To analyze these modes and their interactions, analyzed region is decided in this study. Satisfying the boundarycontinuity between adjacent structures under combined loads, Multi-freedom Dependent Constraint]VIethod is applied for boundary condition.