Loading...

Investigating The Seismic Performance of R/C Buildings Equipped With Shape Memory Alloy Braces

Sattari Nikkhoo, Mehrdad | 2010

576 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40469 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Rahimzadeh Rofooei, Fayyaz
  7. Abstract:
  8. Shape memory alloys (SMAs) are metallic materials that have unique properties, including shape memory effects, superelastic effects, and high damping characteristics. Recovery of large deformation and capability of energy dissipation during mechanical loading-unloading cycles are special properties of superelastic effect of shape memory alloys. Due to these distinctive macroscopic behaviors, not present in most traditional materials, SMAs are the basis for innovative applications like devices for protecting buildings from structural vibrations. This paper presents a numerical investigation aimed at evaluating the improvements achievable through devices for passive seismic protection of reinforced concrete buildings based on the use of shape memory alloys (SMA). A large number of 3D reinforced concrete models with 3, 5, 8 and 12 stories are analyzed in OpenSEES software undergoing 20 records of ground motions, scaled to 0.4g and 0.6g. These models are according to the following configuration: non protected buildings, buildings protected with steel braces and buildings protected with SMA braces. For more parametric analysis all types of structures have been modeled with 10% and 15% eccentricity, moreover structures without eccentricity. Finally, dynamic responses of the uncontrolled and controlled buildings are calculated to verify the effectiveness of the proposed SMA dampers for vibration control of building structures. The results show that the developed SMA braces are very effective in reducing structural response and have great potential for use as efficient energy dissipation devices.

  9. Keywords:
  10. Shape Memory Alloy ; Passive Control ; Superelasticity ; Reinforced Concrete Structures

 Digital Object List

 Bookmark

No TOC