Development of fragility curves by incorporating new spectral shape indicators and a weighted damage index: case study of steel braced frames in the city of Mashhad, Iran

Hamid Kazemi, Mohsen Ghafory-Ashtiany, Alireza Azarbakht

Research output: Contribution to journalArticle

5 Citations (Scopus)


In this study, strong ground motion record (SGMR) selection based on Eta (η) as a spectral shape indicator has been investigated as applied to steel braced frame structures. A probabilistic seismic hazard disaggregation analysis for the definition of the target Epsilon (ε) and the target Eta (η) values at different hazard levels is presented, taking into account appropriately selected SGMR’s. Fragility curves are developed for different limit states corresponding to three representative models of typical steel braced frames having significant irregularities in plan, by means of a weighted damage index. The results show that spectral shape indicators have an important effect on the predicted median structural capacities, and also that the parameter η is a more robust predictor of damage than searching for records with appropriate ε values.

Original languageEnglish
Pages (from-to)383-395
Number of pages13
JournalEarthquake Engineering and Engineering Vibration
Issue number2
Publication statusPublished - 11 Apr 2017



  • damage index
  • hazard disaggregation
  • incremental dynamic analysis
  • record selection
  • spectral shape indicator
  • vulnerability

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