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Evaluation of Strengthening Methods for Concrete Shear Walls

Fatemian, Amir Masoud | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 48567 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Khaloo, Alireza; Kazemi, Mohammad Taghi
  7. Abstract:
  8. The purpose of this study is to determine the effects of some strengthening methods such as steel jacketing, concrete jacketing and FRP wraps in the overall behavior of structures and introducing the most appropriate method. For this purpose a 14 story building with intentionally weak designed shear walls was considered, subsequently each of the strengthening methods were followed for the shear walls and relative structural outcomes like total stiffness and lateral movements were calculated, studied and compared and finally a guideline for choosing the most appropriate strengthening method for concrete shear walls is resulted. It is established that for the system with steel jacketing strengthening technique, a significant increasing in the system stiffness and ductility are expected. Although, the resulted increase in the ductility ratio is significantly more than the resulted increase in stiffness ratio. However, for the system with concrete jacketing strengthening a high level increasing of the system stiffness and low level increasing of the ductility are expected. Also, it is presented that using steel jacketing could provide more reduction of story drift than concrete jacketing. It was also found that using high strength concrete jacketing leads to a more ductile system than the normal concrete jacketing. Considering the FRP wrap technique led to the most ductile system, while the minimum increasing of stiffness was observed. It was providing maximum decrease in the story drift without considerably adding stiffness, of course this is so ideal and represents most preferable systems and behavior against seismic excitation
  9. Keywords:
  10. Concrete Shear Wall ; Steel Jacketing ; Fiber Reinforced Polymer (FRP) ; Seismic Retrofit ; Earthquake Resistance ; Concrete Jacket

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