@Article{sdhm.2023.011439,
AUTHOR = {Yazeed Al-Radhi, Farzad Hejazi, Azmi Abdulkarim, Ali Feroozi},
TITLE = {Assessment of Aged Offshore Jacket Type Platforms Considering Environmental Loads and Degradation Parameters},
JOURNAL = {Structural Durability \& Health Monitoring},
VOLUME = {17},
YEAR = {2023},
NUMBER = {2},
PAGES = {89--113},
URL = {http://www.techscience.com/sdhm/v17n2/52729},
ISSN = {1930-2991},
ABSTRACT = {Offshore steel structures are a common investment in oil and gas industries operating in shallow to medium
depth seas. These structures have become increasingly popular since the mid-19th century, with a typical design
life of 30-50 years. Despite their popularity, the structural integrity of existing offshore structures remains a
controversial topic. Environmental loads and material degradation have been identified as significant factors that
can compromise the structural integrity of offshore structures. To address this issue, this study aims to investigate
the reserved strength capacity of a selected offshore structure located in the Malaysian Seas. The study will explore
the effect of oceanographic data, variations in vertical load, and corrosion on the structure’s main members. To
determine the impact of each variable on the reserved strength ratio (RSR) of the structure, several pushover
analyses were conducted with different variables. Previous literature has shown little or no relationship between
seawater wave height, gravity loads, and corrosion allowance on submerged steel members and the RSR of
offshore structures. However, this study aims to fill this gap in knowledge by examining these variables’ effects
on the RSR of offshore structures. The study’s findings indicate that even a slight increase in wave height can
significantly impact the structure’s RSR due to the increase in lateral loading, potentially leading to severe damage
to structural components and the foundation model. Additionally, gravity loads had an adverse effect on the RSR
of the structure when more than double the vertical load was added. Corrosion allowance was also found to
impact the RSR, particularly when assuming significant wall thickness corrosion in primary members. Overall,
the findings of this study have important implications for the design and maintenance of offshore structures. The
results suggest that engineers and operators should pay close attention to the potential impacts of environmental
loads, such as wave height and gravity loads, and material degradation, such as corrosion allowance, on the structural
integrity of offshore structures. This information can be used to optimize the design and maintenance of offshore
structures, leading to safer and more efficient operations.},
DOI = {10.32604/sdhm.2023.011439}
}