الفهرس 
CHAPTER (1): INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
In this research, the fatigue performance of strengthened steel plate girders with CFRP strips was investigated using numerical models. The cracked plate girders were strengthened by different reinforcement configurations at high damage level of web plate. The research confirmed that the strengthening by CFRP strips leads to a significant increase in fatigue life and a reduction in crack propagation, especially the strengthening for both flange and web. Moreover, the study proposed V-Shape strengthening system by CFRP strips around the crack in the web plate. Consequently, the results demonstrated that U-shape strengthening system with prestressed CFRP has the best efficiency for fatigue strengthening. On the other hand, the fatigue analysis based on stress life method was performed by using S-N curve to predict the actual total fatigue life for the steel plate girder without initial damage.