Adjustment of the seismic collapse fragility curves of structures by considering the ground motion spectral shape effects

Alireza Azarbakht, Mehdi Mousavi, Mohsen Ghafory-Ashtiany

Research output: Contribution to journalReview article

2 Citations (Scopus)


The influence of the indicator η on the collapse capacity of structural systems has been investigated in this article. Eta has been introduced recently as an indicator of spectral shape which has strong influence on the structural nonlinear response. In this article, a closed form formula has also been developed to predict the collapse capacity of structures as a function of their structural behaviour parameters. The collapse fragility of a given structure can be determined for different hazard levels by adjusting the single fragility which results from a general set of ground motion records. The results of a seismic collapse risk analyses of a four-and an eight-story reinforced concrete test structure have confirmed the consistency of the proposed simple approach which is valid for period range of 0.25-3.0 s and the ductility range of 4-12.

Original languageEnglish
Pages (from-to)1095-1112
Number of pages18
JournalJournal of Earthquake Engineering
Issue number8
Publication statusPublished - 1 Nov 2012



  • collapse capacity
  • epsilon
  • Eta
  • seismic fragility curve
  • spectral shape
  • seismic fragility
  • reinforced concrete
  • seismology
  • intensity measure

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