Investigation of the corrosion factor to the global strength of aging offshore jacket platforms under different marine zones

IF 2.3 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI:10.1016/j.ijnaoe.2022.100496

Nor Adlina Othman, Mohd Hairil Mohd, Mohd Asamudin A Rahman, Mohd Azlan Musa, Ahmad Fitriadhy

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Abstract

This paper investigates the corrosion factor to the global strength of aging offshore jacket platforms in different marine zones. The time-dependent corrosion wastage model from Melchers, an active corrosion expert, by considering different marine zones, i.e., atmospheric, splash, and immersion. In addition, three aged jacket platform models of the originally installed platform were selected to investigate the effect of corrosion wastage on global strength. The jacket platform's global strength is calculated by the Reserve Strength Ratio (RSR) value. RSR is obtained via nonlinear static pushover analysis and is always used to estimate overall structure strength reserves. Safety assessment is evaluated by the PETRONAS Technical Standard (PTS). According to this study, immersion zone corrosion is the most influential zone after splash zone corrosion. Furthermore, the study also predicts the lifetime of each jacket platform, and it is useful for structural engineers to estimate corrosion allowance at the early design stage.

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不同海域老化海上导管架平台整体强度的腐蚀因素研究

本文研究了不同海域老化海上导管架平台整体强度的腐蚀因素。主动腐蚀专家Melchers通过考虑不同的海洋区域，即大气、飞溅和浸泡，建立了随时间变化的腐蚀损耗模型。此外，选取原安装平台的三种老化导管架平台模型，研究腐蚀损耗对整体强度的影响。导管架平台的整体强度由储备强度比(RSR)值计算。RSR是通过非线性静力推覆分析得到的，通常用于估计整体结构的强度储备。安全评估采用PETRONAS技术标准(PTS)进行评估。根据本研究，浸没区腐蚀是继飞溅区腐蚀之后影响最大的区域。此外，该研究还预测了每个导管架平台的寿命，为结构工程师在设计早期估计腐蚀余量提供了有用的信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Naval Architecture and Ocean Engineering ENGINEERING, MARINE-

CiteScore

4.90

自引率

4.50%

发文量

审稿时长

12 months

期刊介绍： International Journal of Naval Architecture and Ocean Engineering provides a forum for engineers and scientists from a wide range of disciplines to present and discuss various phenomena in the utilization and preservation of ocean environment. Without being limited by the traditional categorization, it is encouraged to present advanced technology development and scientific research, as long as they are aimed for more and better human engagement with ocean environment. Topics include, but not limited to: marine hydrodynamics; structural mechanics; marine propulsion system; design methodology & practice; production technology; system dynamics & control; marine equipment technology; materials science; underwater acoustics; ocean remote sensing; and information technology related to ship and marine systems; ocean energy systems; marine environmental engineering; maritime safety engineering; polar & arctic engineering; coastal & port engineering; subsea engineering; and specialized watercraft engineering.