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<p>Steel tubular structures from aging offshore units may experience significant corrosion in areas that are difficult to access for protection. Perforations might occur based on the extent and severity of corrosion. This type of damage can weaken the structural integrity of the unit based on the quantity of affected components. To address this, a research program was conducted to assess the efficacy of using composite materials to strengthen steel tubular members that present perforation damage due to corrosion. Material characterization was performed on composite material and steel. Experimental tests and numerical modeling were conducted to investigate the behavior of intact, damaged, and repaired states of 1:3.5 scale perforated steel tubular member samples under different load scenarios. The samples used in the studies considered different levels of damage, diameter-to-thickness, and length-to-thickness ratios, as well as different configurations of the strengthening patches of composite materials. It was found that a moderate repair thickness can recover the damaged samples’ lost strength, demonstrating the approach’s effectiveness as a feasible alternative for decreasing repair times and offshore unit risk. The research presents results from experiments, repair methodologies, and model calculations.</p>

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Composite materials-based strengthening of perforated steel tubular members

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Irving D. Hernández,
  • Murilo A. Vaz,
  • Julio C. R. Cyrino,
  • Jorge L. Martinez,
  • Victor D. Zegarra,
  • Valber Perrut,
  • Gustavo G. de Paula

摘要

Steel tubular structures from aging offshore units may experience significant corrosion in areas that are difficult to access for protection. Perforations might occur based on the extent and severity of corrosion. This type of damage can weaken the structural integrity of the unit based on the quantity of affected components. To address this, a research program was conducted to assess the efficacy of using composite materials to strengthen steel tubular members that present perforation damage due to corrosion. Material characterization was performed on composite material and steel. Experimental tests and numerical modeling were conducted to investigate the behavior of intact, damaged, and repaired states of 1:3.5 scale perforated steel tubular member samples under different load scenarios. The samples used in the studies considered different levels of damage, diameter-to-thickness, and length-to-thickness ratios, as well as different configurations of the strengthening patches of composite materials. It was found that a moderate repair thickness can recover the damaged samples’ lost strength, demonstrating the approach’s effectiveness as a feasible alternative for decreasing repair times and offshore unit risk. The research presents results from experiments, repair methodologies, and model calculations.