Loading...

Optimal Retrofitting of the Steel Moment Resisting Frames Using Telescopic Dampers

Sakhdari, Sepideh | 2021

351 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 54470 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Mofid, Masoud; Eskandari, Morteza
  7. Abstract:
  8. The purpose of this thesis is the optimal retrofitting of the moment resisting frames with telescopic dampers, using the adaptive approach. In this regard, numerical modeling of the telescopic behavior has been presented firstly. Also, a 3,9,20 story (sac) moment resisting frame has been modeled in the OpenSees environment and the time history analysis has been carried out under a specific earthquake record. It is shown that inter-story drifts of the frame exceed the acceptance criteria which has been assumed 2.5% according to the Life Safety limit. Then, the optimal retrofitting of the frame has been done. It is demonstrated that the maximum inter-story drift of all stories is 2.5% or less, while the slip load and placement of the dampers have been optimized simultaneously. It is shown that inter-story drifts of the frame exceed the acceptance criteria which has been assumed 2.5% according to the Life Safety limit. Then, the optimal retrofitting of the frame has been done. It is demonstrated that the maximum inter-story drift of all stories is 2.5% or less, while the slip load and placement of the dampers have been optimized simultaneously. Genetic Algorithm, which is one of the evolutionary algorithms, is employed to define the optimum outline of dampers throughout the structure. According to presented optimization methods, various inelastic moment-resisting steel frames with some flaws in primary designing phase were rehabilitated optimally
  9. Keywords:
  10. Optimization ; Telescopic Damper ; Time History Analysis ; OpenSees Software ; Nonlinear Dynamic Analysis ; Genetic Algorithm ; Adaptive Method ; Steel Moment Resistant Frame

 Digital Object List

 Bookmark

...see more