• KASSAHUN KEBEDE GELETA
• SHIFERAW GAROMA WAYESSA
• KARUNANIDHI SUDHANTHIRAM

Existing bridges are being subjected to an ever increasing volume of heavy truck traffic, and increasing number of vehicles. This may reduce life and strength they were designed for. Due to this performance declining, it is customary to determine the available strength and remaining life in existing bridges as it provides evidence if the bridge function safely over a specified design life. The objective of this study is to assess a performance of concrete bridge. Load rating was made to determine the available capacity under ERA type-3 legal truck and fatigue life of the bridge was estimated based on linear elastic fracture mechanics and Stress-based approaches under AASHTO 1990 fatigue truck model in which a girder line analysis method was utilized for both load rating and fatigue analysis. A Non-destructive test was done on a case study bridge to determine concrete strength from which the bridge has constructed. The rating values determined were greater than the rating truck load weight both for flexure and shear. The available life of the bridge was also predicted. The evaluation results show that the bridge can serve for 38.6 years. Finally, it was concluded that the bridge is safe in carrying the current live loads but fatigue failure is likely to happen in its lifetime.

existing concrete bridges, fatigue life, load rating, Non-destructive test, stress-life.

"Rating and Fatigue-Life Evaluation of Existing Reinforced Concrete Girder Bridges: A Case Study on Oda Bridge", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.283-295, December-2018, Available :http://www.jetir.org/papers/JETIR1812441.pdf

"Rating and Fatigue-Life Evaluation of Existing Reinforced Concrete Girder Bridges: A Case Study on Oda Bridge", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp283-295, December-2018, Available at : http://www.jetir.org/papers/JETIR1812441.pdf