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Rehabilitation of pre-loaded reinforced concrete columns exposed to fire using advanced strengthening techniques

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  • Mohanad Wisam Mousa
  • Ahlam Sader Mohammed
  • Sarmad Shafeeq Abdulqader

Abstract

This study presents an experimental investigation on the rehabilitation of fire-damaged reinforced concrete (RC) columns using two strengthening techniques: full wrapping with carbon fibre reinforced polymer (CFRP) and jacketing with ultra-high-performance concrete (UHPC). Seven small-scale RC column specimens were tested under eccentric loading with an eccentricity of (e = 45 mm). The fire-exposed specimens were subjected to temperatures of (500 °C) and (700 °C) for (60 min) under a pre-applied axial load equal to (50%) of the ultimate load capacity, followed by sudden water quenching. An unexposed reference column was used for comparison. The results showed that fire exposure reduced the ultimate load-carrying capacity by (29.69%) and (51.26%) at (500°C) and (700°C), respectively. After rehabilitation, columns strengthened with CFRP showed capacity increases of (35.86%) and (83.91%), whereas those strengthened with UHPC achieved higher increases of (93.62%) and (157.47%), respectively.

Suggested Citation

  • Mohanad Wisam Mousa & Ahlam Sader Mohammed & Sarmad Shafeeq Abdulqader, 2026. "Rehabilitation of pre-loaded reinforced concrete columns exposed to fire using advanced strengthening techniques," International Journal of Critical Infrastructures, Inderscience Enterprises Ltd, vol. 22(11), pages 1-23.
    • Handle: RePEc:ids:ijcist:v:22:y:2026:i:11:p:1-23
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