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Application of SMA-Equipped Connections in Improving the Seismic Behavior of Steel Structures

Nemati, Fariba | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48553 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Rahimzadeh Rofooie, Fayyaz
  7. Abstract:
  8. Application of Shape Memory Alloys (SMAs) as a means for vibration suppression of structural systems has extensively been explored in recent years. Recovering the applied residual strain upon unloading (super-elasticity) or by heating (shape memory effect) at different temperature ranges are two inherent features of SMA materials that have gained most attention. In this work, the seismic behavior of a proposed beam-column semi-rigid end-plate connection that has been equipped with both steel and SMA studs in austenite phase is investigated. A number of 3-D steel MRF structural models with 6,9 and 12 number of stories are considered. These structural models are subjected to bi-directional near field and far field earthquake records that are scaled according to PGA=0.4g. The obtained results indicate that the proposed connection effectively reduces the seismic response parameters of the structural models. Using both steel and SMA studs in the connections prevent the structural models from excessive inter-story drifts beside reducing the maximum shear base. Furthermore, considerable reduction has been achieved in residual deformation of the structural models. The OpenSees program is used for modeling the proposed connections and performing the numerical analyses
  9. Keywords:
  10. Steel Moment Resistant Frame ; Nonlinear Dynamic Analysis ; Shape Memory Alloy ; Superelasticity ; Steel Structures

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