Structural Engineering and Mechanics, Vol.42, No.4, pp.531-549, 2012.

Effect of corrosion on the ultimate strength of double hull oil tankers - Part II: hull girders

Author(s): Do Kyun Kim, Dae Kyeom Park, Dong Hee Park, Han Byul Kim, Bong Ju Kim*, Jung Kwan Seo and Jeom Kee Paik


Abstract:

Numerous oil tanker losses have been reported and one of the possible causes of such
casualties is caused by the structural failure of aging ship hulls in rough weather. In aging ships, corrosion
and fatigue cracks are the two most important factors affecting structural safety and integrity. This
research is about effect on hull girder ultimate strength behavior of double hull oil tanker according to
corrosion after Part I: stiffened panel. Based on corrosion data of Part I (time-dependent corrosion
wastage model and CSR corrosion model), when progressing corrosion of fourtypes of double hull oil
tankers (VLCC, Suezmax, Aframax, and Panamax), the ultimate strength behavior of hull girder is
compared and analyzed. In case of the ultimate strength behavior of hull girder, when occurring corrosion,
the result under vertical and horizontal bending moment is analyzed. The effect of time-dependent
corrosion wastage on the ultimate hull girder strength as well as the area, section modulus, and moment
of inertia are also studied. The result of this research will be useful data to evaluate ultimate hull girder
strength of corroded double hull oil tanker.