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Reliability-Based Seismic Loss Assessment of Eccentrically Braced Frame Buildings

Godazgar, Behfar | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52765 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Dolatshahi, Kiarash
  7. Abstract:
  8. In this research, seismic loss of eccentrically braced frame buildings is assessed by using reliability methods. For this end, first, Bayesian linear regression is utilized to characterize the epistemic uncertainty of the problem in the form of damage models. The input of these models are mechanical and physical properties of the components, and the outputs are damage ratios. In the second step, by using the developed models and the comprehensive library of probabilistic models of Rt, reliability analysis is conducted on 4, 8, and 16 stories building located in San Jose. The limit state function is seismic loss, including repair loss, collapse loss, and demolition loss, and analysis method is scenario sampling. Moreover, two different modelling approaches are utilized in the form of BG models and B models. Gravity frames' effect on structural response are explicitly captured by modeling gravity frames in BG models. On the other hand, this effect is not captured in B models. Finally, it is observed that collapse and demolition loss are significantly dependent on modeling approach, and in the absence of gravity frames, those loss are considerably overestimated. In contrast, repair loss is independent of modeling approach and is relatively constant in two modelling approach. Finally, suspended ceiling and partition walls were found to be the most loss-making components
  9. Keywords:
  10. Eccentrically Braced Frame (EBF) ; Scenario Sampling ; Damage Model ; Seismic Assessment ; Repair Loss ; Collapse Loss ; Demolition Loss ; Seismic Cost Evaluation

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