A method for calculating the expected seismic resilience and cost-time recovery curve of buildings

Document Type : Original Article

Authors

1 Ph.D. Candidate. Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

2 Associate Professor Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

3 Assistant Professor. Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

Abstract

Seismic resilience of a structure is defined as the ability of the system to maintain its functionality and to quickly return the damaged system to the required functionality. In this approach, system performance is evaluated through a unique decision variable called "resilience" which includes a combination of several variables (economic losses, casualties, reconstruction time, etc.). In the present study, a method for calculating the expected seismic resistance of buildings is presented. In the proposed method, it is assumed that the amount of reduction in the performance of the system is proportional to the direct economic damage to the structural and non-structural elements. The recovery cost and time of the structural and non-structural elements are calculated using FEMA-P58 library data and the reconstruction time of the whole building is calculated based on the order of the proposed reconstruction operations in the REDi instruction. The proposed method is applied to 9-storey buildings with Per-Northridge and Post-Northridge steel moment frames and expected recovery cost, expected recovery time and the expected seismic resilience for the two buildings are compared. The total recovery time according to REDi method is very different from the total recovery time provided by FEMA P58 and should be seriously considered in calculating the cost-time curve and resilience of different systems. It is also observed that using Post-Northridge connections in comparison with Pre-Northridge connections, significantly reduces the recovery costs and time, and thus increases seismic resilience.

Keywords

Main Subjects

References

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History

  • Receive Date: 23 June 2022
  • Revise Date: 05 September 2022
  • Accept Date: 11 September 2022

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