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Bridges in northern climatic zones face significant challenges due to accelerated degradation attributable to extreme environmental conditions and continuous fatigue loading. This investigation utilizes finite element modelling (FEM) using ANSYS to examine the efficacy of carbon fiber reinforced polymer (CFRP) for strengthening 60-year-old reinforced concrete bridge girders, particularly focusing on their performance under both fatigue and static loading scenarios. Building on previous experimental work, this research validates FEM simulations against established data from girders that were CFRP-strengthened in service. The analysis focuses on the residual fatigue life and shear capacity of these girders, emphasizing the critical role of CFRP in enhancing structural performance. The results indicate that CFRP strengthening significantly extends the service life of aged bridge elements. Notably, the bonding characteristics at the CFRP-concrete interface were found to be highly effective, with no indications of debonding or tensile failure preceding the formation of diagonal shear cracks. This research underscores the potential of using FEM as a promising tool for assessing bridge rehabilitation strategies, providing essential insights into the load-carrying capabilities of aging infrastructure in harsh climates and supporting the case for broader adoption of CFRP technologies in structural engineering.

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Finite Element Modelling of Full-Scale Bridge Beams Strengthened with CFRP Sheets: Enhancing Shear Capacity and Fatigue Resistance

  • 会议论文

  • 发表日期：

    2026年

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  • Ramy Alkeblawy,
  • Sylvain Theriault,
  • Mohamed Ahmed,
  • Slimane Metiche,
  • Radhouane Masmoudi

摘要

Bridges in northern climatic zones face significant challenges due to accelerated degradation attributable to extreme environmental conditions and continuous fatigue loading. This investigation utilizes finite element modelling (FEM) using ANSYS to examine the efficacy of carbon fiber reinforced polymer (CFRP) for strengthening 60-year-old reinforced concrete bridge girders, particularly focusing on their performance under both fatigue and static loading scenarios. Building on previous experimental work, this research validates FEM simulations against established data from girders that were CFRP-strengthened in service. The analysis focuses on the residual fatigue life and shear capacity of these girders, emphasizing the critical role of CFRP in enhancing structural performance. The results indicate that CFRP strengthening significantly extends the service life of aged bridge elements. Notably, the bonding characteristics at the CFRP-concrete interface were found to be highly effective, with no indications of debonding or tensile failure preceding the formation of diagonal shear cracks. This research underscores the potential of using FEM as a promising tool for assessing bridge rehabilitation strategies, providing essential insights into the load-carrying capabilities of aging infrastructure in harsh climates and supporting the case for broader adoption of CFRP technologies in structural engineering.