The Influence of the Stiffened Plate Distance to the Ultimate Strength under Blast Loading Condition

The ultimate strength is one of the most important aspect in all design criteria. Blast or explosion may takes place on the offshore structure and it is a catastrophic failure with small probability and cannot be predicted. The stiffened plate distance has significant influence to the ultimate strength under blast loading condition. In order to know the influence, the analysis must be conducted. In the present study, the analysis of the influence of the stiffened plate distance is performed using The Non-Linear Finite Element Method (FEM) code ANSYS. The investigation of the stiffened plate is located at the deck part of the structure. The stiffened plate distance is varied to know the influence due to blast loading. The blast loading is assumed to be applied in vertical direction combined with the uniaxial thrust. The fixed supported of boundary condition is applied along the side of the stiffened plate. The result obtained by the FE analysis for the influence of the stiffened plate to the ultimate strength under blast loading is compared for any stiffened plate distance and the behavior of the ultimate strength including post ultimate strength is also presented in this paper.