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Numerical Modeling of Shear Strengthening of Reinforced Concrete Deep Beams by Using FRP

Shayanmehr, Siavash | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 42790 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Kazemi, Mohammad Taghi
  7. Abstract:
  8. The structural behavior of deep beams is different with usual beams as a result of the low span-to-height ratio. Shear failure load is less for deep beams. Implementation of externally bonded reinforcement such as fiber reinforced polymers (FRP) is a unique method for shear strengthening of deep beams. In this study, the effects of FRP layers on the web of the reinforced concrete deep beam have been investigated by a nonlinear finite element program. Five beams four of which were strengthened with FRP laminates were numerically modeled and the results were compared with experimental results. The effect of some governing parameters such as compressive strength of concrete, orientation of fibers in one-layer FRP wrap and different methods of strengthening by variation in configuration of FRP strips were studied. The results show that the FRP strengthening method is more effective for deep beams with lower concrete strength. For the fibers in one-layer FRP laminate, the study indicates that the orientation angle between 120 to 150 degrees provides the highest ultimate strength. The combination of horizontal and diagonal FRP strips has the best performance in shear strengthening of reinforced concrete deep beams and finally strengthening with CFRP leads to better results than strengthening with GFRP.

  9. Keywords:
  10. Numerical Modeling ; Finite Element Method ; Reinforced Concrete Deep Beams ; Fiber Reinforced Polymer (FRP) ; Shear Strengthening

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