Steel and Composite Structures

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Nonlinear earthquake capacity of slender old masonry structures prestressed with steel, FRP and NiTi SMA tendons

  • Preciado, Adolfo (Departamento del Habitat y Desarrollo Urbano, Instituto Tecnologico y de Estudios Superiores de Occidente (ITESO)) ;
  • Ramirez-Gaytan, Alejandro (Departamento de Ciencias Computacionales, Centro Universitario de Ciencias Exactas e Ingenieria, Universidad de Guadalajara (UdeG)) ;
  • Gutierrez, Nayar (Departamento del Habitat y Desarrollo Urbano, Instituto Tecnologico y de Estudios Superiores de Occidente (ITESO)) ;
  • Vargas, David (Departamento del Habitat y Desarrollo Urbano, Instituto Tecnologico y de Estudios Superiores de Occidente (ITESO)) ;
  • Falcon, Jose Manuel (Departamento del Habitat y Desarrollo Urbano, Instituto Tecnologico y de Estudios Superiores de Occidente (ITESO)) ;
  • Ochoa, Gil (Departamento del Habitat y Desarrollo Urbano, Instituto Tecnologico y de Estudios Superiores de Occidente (ITESO))
  • Received : 2016.09.30
  • Accepted : 2017.12.14
  • Published : 2018.01.25
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Abstract

This paper focuses on the seismic protection of slender old masonry structures by the implementation of prestressing devices at key locations. The devices are vertically and externally located inside the towers in order to be reversible and calibrated. An extensive parametric study on a selected slender tower is carried out based on more than 100 nonlinear static simulations aimed at investigating the impact of different parameters on the seismic performance: (i) different prestressing levels; (ii) shape memory alloy superelasticity and (iii) changes in prestressing-forces in all the stages of the analysis until failure and masonry toe crushing. The tendon materials under analysis are conventional prestressing steel, fiber-reinforced polymers of different fibers and shape memory alloys. The parametric study serves to select the most suitable prestressing device and optimal prestressing level able to dissipate more earthquake energy. The seismic energy dissipation is evaluated by comparing the structural capacity curves in original state and retrofitted.

Keywords

References

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