FRACAS: a capacity spectrum approach for seismic fragility assessment including record-to-record variability

Tiziana Rossetto, Pierre Gehl, Stylianos Minas, Carmine Galasso, Philippe Duffour, John Douglas, Oliver Cook

Research output: Contribution to journalArticle

30 Citations (Scopus)
85 Downloads (Pure)

Abstract

This paper presents a new approach for the derivation of fragility curves, named FRAgility through Capacity spectrum ASsessment (FRACAS). FRACAS adapts the capacity spectrum assessment method and uses inelastic response spectra derived from earthquake ground motion accelerograms to construct fragility curves. Following a description of the FRACAS approach, the paper compares the predicted maximum interstory drift (MIDR) response obtained from FRACAS and nonlinear time history analyses (NLTHA) for two case-study buildings subjected to 150 natural accelerograms. FRACAS is seen to represent well the response of both case-study structures when compared to NLTHA. Observations are made as to the sensitivity of the derived fragility curves to assumptions in the capacity spectrum assessment and fragility curve statistical model fitting. The paper also demonstrates the ability of FRACAS to capture inelastic record-to-record variability and properly translate this into resulting fragility curves. In particular, through an example application, it is shown that the variability in spectral ordinates for periods beyond the natural period of the undamaged structure is directly correlated to the standard deviations of the fragility curves.
Original languageEnglish
Pages (from-to)337-348
Number of pages12
JournalEngineering Structures
Volume125
Early online date25 Jul 2016
DOIs
Publication statusE-pub ahead of print - 25 Jul 2016

Keywords

  • capacity spectrum method
  • record-to-record variability
  • fragility curve
  • earthquake engineering

Fingerprint Dive into the research topics of 'FRACAS: a capacity spectrum approach for seismic fragility assessment including record-to-record variability'. Together they form a unique fingerprint.

  • Research Output

    • 30 Citations
    • 2 Conference contribution book

    Investigating the use of record-to-record variability in static capacity approaches

    Gehl, P., Douglas, J., Rossetto, T., Macabuag, J., Nassirpour, A., Minas, S. & Duffour, P., 7 Jul 2014, Vulnerability, Uncertainty, and Risk: Quantification, Mitigation, and Management. Beer, M., Au, S-K. & Hall, J. W. (eds.). Reston, Virginia: American Society of Civil Engineers (ASCE), p. 1675-1684 11 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution book

    Open Access
    File
  • 2 Citations (Scopus)
    9 Downloads (Pure)

    Sensitivity analysis of different capacity spectrum approaches to assumptions in the modeling, capacity and demand representations

    Rossetto, T., Gehl, P., Minas, S., Nassirpour, A., Macabuag, J., Duffour, P. & Douglas, J., 7 Jul 2014, Vulnerability, Uncertainty, and Risk: Quantification, Mitigation, and Management. Beer, M., Au, S-K. & Hall, J. W. (eds.). Reston, Virginia: American Society of Civil Engineers (ASCE), p. 1665-1674 10 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution book

    Open Access
    File
  • 4 Citations (Scopus)
    4 Downloads (Pure)

    Cite this