Experimental Evaluation of Retrofit of RC Beams Damaged by Reinforcement Corrosion Using GFRP Sheets

Document Type : Research Paper

Authors

1 Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran

2 Shahrood University of technology

3 Faculty of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

One of the most effective methods for strengthening and repairing damaged corrosion elements is the use of fiber reinforced polymers. In this research, an experimental study was conducted to investigate the effect of GFRP on the retrofit of corroded RC beams. For this purpose, 15 concrete beams were constructed with two types of hooked metal fibers and polymeric macros with a volume percentage of 0% and 0.5%. The samples were tested at three levels of corrosion of 0%, 7% and 9%. An accelerated corrosion test was used from a 3% salt pool. Finally, corroded beams retrofitted with a GFRP composite polymer fiber layer were subjected to a flexural loading test. Based on experimental results, corrosion reduces the ductility of the specimens and the use of GFRP increases the ductility and bearing capacity of the specimens and reduces the number of cracks created and increases the depth of them and more focus on failure and damage is within the range of sheet separation.

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