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<p>This research primarily aims to evaluate the structural performance and durability of corroded self-compacting concrete-filled steel tubular (CFST) short columns strengthened with carbon fiber reinforced polymer (CFRP) sheets. Corrosion, a critical challenge in steel structures, was simulated at three levels (25%, 50%, and 75%) to assess its impact on load-carrying capacity. Seven columns, categorized into three groups based on corrosion levels and CFRP strengthening, were fabricated and tested under axial loading. The results demonstrated that corrosion reduced the load capacity of CFST columns by up to 23.3% at the highest damage level. Strengthening with CFRP sheets effectively restored structural stability, with improvements ranging from 1.3 to 24.7%. These findings highlight the ability of CFRP to mitigate corrosion-induced damage and enhance the durability and load capacity of CFST columns. This study addresses a key research gap and provides valuable insights for rehabilitating corroded CFST structures in aggressive environments.</p>

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Effect of CFRP sheets on strength recovery of self-compacting concrete-filled steel tubular columns simulated with regional corrosion

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Hussam J. Atiyah,
  • Asma Mahdi Ali,
  • Ali Hameed Aziz

摘要

This research primarily aims to evaluate the structural performance and durability of corroded self-compacting concrete-filled steel tubular (CFST) short columns strengthened with carbon fiber reinforced polymer (CFRP) sheets. Corrosion, a critical challenge in steel structures, was simulated at three levels (25%, 50%, and 75%) to assess its impact on load-carrying capacity. Seven columns, categorized into three groups based on corrosion levels and CFRP strengthening, were fabricated and tested under axial loading. The results demonstrated that corrosion reduced the load capacity of CFST columns by up to 23.3% at the highest damage level. Strengthening with CFRP sheets effectively restored structural stability, with improvements ranging from 1.3 to 24.7%. These findings highlight the ability of CFRP to mitigate corrosion-induced damage and enhance the durability and load capacity of CFST columns. This study addresses a key research gap and provides valuable insights for rehabilitating corroded CFST structures in aggressive environments.