Time-Dependent Reliability Analysis of Plate-Stiffened Prismatic Pressure Vessel with Corrosion

In this study, the structural reliability of plate-stiffened prismatic pressure vessels was analyzed over time. A analysis performed using a time-dependent method based on response surface (RSM). The vessel had rectangular cross-section with repeated internal load-bearing structures. For analysis, structure modeled as strip, and to identify changes in index when general corrosion pitting occurred outer shell. Pitting assumed be randomly distributed shell, according degree pit (DOP) time analyzed. Analysis results confirmed that change larger applied compared only applied. Additionally, it above certain DOP, affected.