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Improvement in Reinforced Concrete Beam-Column Connections Behaviour using FRP Sheets

Rokrokian, Ali | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43422 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Khaloo, Alireza
  7. Abstract:
  8. Performance of reinforced concrete frames is highly dependent on detailing of the joint connections between its members, such as beams and columns. To have a good structural behavior, joints must show ductile behavior and designed based on the philosophy of strong column-weak beam. In the case of sever lacking ductility, strength or even rigidity of the connections, or having a weak column-strong beam, in the existing structures, there is a need for seismic upgrading of the connection. There are several ways for seismic upgrading of this type of connections.In the last decade Fiber Reinforced Polymer (FRP) widely has been used to strengthening the reinforced concrete (RC) members. Most of these research works have been concentrated on the confining concrete members in order to enhancement the ductility and energy dissipation of them versus earthquake loads. Using of FRP to strengthening of concrete beam- column connections is one of the newest applied methods to strengthening and improvement of this structures. In this research, using FRP sheets for seismic upgrading of Concrete Beam-Column connections subjected to axial and cyclic loads has been investigated using finite element method. In this casefirst, the finite element model was created using ABAQUS software, and then the experimental results are used to verify the modeling. In this approach 48 strengthened and non-strengthened connections were numerically modeled, and effective parameters on joint behavior such as effect of numbers of layers used in beam and columns, and axial load on the columns under cyclic loading into the end of beam were studied. The result obtained from modeling shown that, confining with FRP can be considerably increase the ultimate bearing capacity and ductility of the RC beam- columns joints.
  9. Keywords:
  10. Beam Wall Connection ; Reinforced Concrete Structures ; Nonlinear Finite Element Method ; Rehabilitation ; Fiber Reinforced Polymer (FRP) ; Upgrading

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