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http://dx.doi.org/10.7846/JKOSMEE.2016.19.4.332

Structural Safety Assessment of a Sunken Ship Considering Hull Corrosion and Damaged Members - Focus on the Sunken Ship 'No. 7 HaeSung' -  

Lee, Seung Hyun (Korea Research Institute of Ships & Ocean Engineering)
Kim, Won Don (Marine Technology & Information Co., Ltd.)
Suh, Jae-Joon (Hanbat National University)
Publication Information
Journal of the Korean Society for Marine Environment & Energy / v.19, no.4, 2016 , pp. 332-340 More about this Journal
Abstract
Sunken ships cause damage to the environment due to the dispersal of fuel oil and harmful cargo goods in the hull. Since the sunken ship is mostly flooded by the seabed, it tends to be in a relatively stable condition. However, the heavy body, together with the load of remaining goods in the cargo hold, the constant contact with the seabed, and ocean currents and tidal waves, can affect dispersal of residual fuel oils out of the sunken ship. Corrosion of the sunken ship starts upon sinking, decreasing the thickness of the hull structure and sub-materials. Therefore, it is necessary to assess the structural stability against the potential breakdown of the sunken ship. Whilst evaluating the danger of the sunken ship, this result should be reflected in 'the possible discharge'. This study was undertaken to suggest a procedure for a step by step evaluation to assess the structural stability a sunken ship. The structural stability assessment to estimate the collapsibility of the hull was structure targeted at the sunken ship 'No. 7 HaeSung', which was classified as the prime example for the intensive management of sunken ships. This study was undertaken to suggest a procedure for a step by step evaluation to assess the structural stability a sunken ship and to propose a method to conduct a structural safety assessment that estimates the collapsibility of the hull by targeting the sunken ship 'No. 7 HaeSung',which was classified as the prime example for the intensive management of sunken ships. The collapsibility of the hull structure was estimated Based on the damage size of the hull structure, and the corrosion rate of the hull structure and sub-materials due to the seawater after sinking. It was confirmed that there was a low possibility of the total destruction of the hull structure at the current time. However, there is a high possibility in the potential failure of the hull structure due to increased rate of corrosion thereafter. Therefore, we believe continuous study on influence of corrosion and marine environment change to sunken ship's structural safety is necessary.
Keywords
Sunken ship; Corrosion; Section modulus; Ultimate strength; Damage size;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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