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Effect of Carbon and Glass FRP Confinement on Compressive Strength of Pre-Damaged Concrete Cylinders

Mohammadi Firouz, Reza | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 41614 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Joghatae, Abdolreza
  7. Abstract:
  8. Recent investigations on construction engineering have determined that repairing of Reinforced Concrete (RC) by means of fiber reinforced polymer (FRP) composites is an effective method of retrofitting existing columns. The main research in this thesis focuses on the repair of concrete specimens which are damaged and their initial strength has been reduced. To achieve this purpose, through experimental procedures, the effect of confining damaged concrete cylinders by FRP, has been investigated. The experimental program included three parameters: type of fibers (glass or carbon), type of confining (full or partial), and the number of layers. First concrete cylinders were made and loaded to their yield level to imitate strengthening with a state of damage, so a minor damage could be assumed. Next, the damaged specimens were wrapped with FRP fabrics with different thickness. The strengthened cylinders were then tested for their compressive strength to assess the capability of FRP in restoring the compressive strength of the cylinders. Two types of FRP composites, Carbon Fiber Reinforced polymer (CFRP) which has very desirable mechanical properties but is expensive and also Glass Fiber Reinforced Polymer (GFRP) with lower properties but acceptable cost range were used in this study. The results showed that FRP can effectively reinforce damaged concrete cylinders
  9. Keywords:
  10. Carbon Fiber Polymer ; Glass Fibers ; Compression Strength ; Retrofiting ; Upgrading ; Fiber Reinforced Polymer (FRP) ; Concrete Damage Plasticity ; Glass Fiber Reinfoced Polymer (GFRP)

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