ABSTRACT
In the design of the midship section it is necessary to know the ultimate longitudinal hull girder strength. The ship structure is exposed to different types of loads related to extreme environmental conditions or accidental events such as collision and grounding. In case of structural damage, due to collision or grounding, the hull girder strength may be reduced compared with the intact condition. If a fracture occurs, the oil spill will be the most severe consequence. Thus, improvements in the design of tanker double bottoms are essential to obtain a high level of safety at sea and protection of marine ecosystems.
