A model for partially dependent component damage fragilities in seismic risk analysis

Published

October 31, 2023

Author(s)

Jack Baker, Edward Almeter, Dustin Cook, ABBIE LIEL, Curt Haselton

Abstract

This paper proposes a model to quantify dependencies in component damage in the FEMA P-58 seismic performance assessment methodology, and to simulate damage realizations with the desired dependencies. The model is compatible with the prior FEMA P-58 procedure, and can quantify more realistic dependencies in component damage with only minor changes to the calculation algorithm and model parameters. This paper introduces the proposed model and compares it with the prior procedure. Example calculations are then used to illustrate the numerical impacts of component damage dependencies on building-level performance metrics. The model is relatively simple to conceptualize and parameterize, so that the degree of dependency can be easily estimated and documented. Given the improved conceptual framing of the problem, and the significant changes it sometimes produces in building-level performance predictions, this model represents an improvement to the general FEMA P-58 seismic performance assessment methodology.

Citation

Earthquake Spectra

Pub Type

Journals

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Keywords

Performance Based Earthquake Engineering, FEMA P-58

Citation

Baker, J. , Almeter, E. , Cook, D. , LIEL, A. and Haselton, C. (2023), A model for partially dependent component damage fragilities in seismic risk analysis, Earthquake Spectra, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936267 (Accessed October 28, 2025)