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 KazemiEmail author
  • Mohsen Ghafory-Ashtiany
  • Alireza Azarbakht


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.


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


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Copyright information

© Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Hamid Kazemi
    • 1
    Email author
  • Mohsen Ghafory-Ashtiany
    • 2
  • Alireza Azarbakht
    • 3
  1. 1.Department of Civil Engineering, Science and Research BranchIslamic Azad UniversityTehranIran
  2. 2.International Institute of Earthquake Engineering and Seismology (IIEES)TehranIran
  3. 3.Department of Civil Engineering, Faculty of EngineeringArak UniversityArakIran

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