Evaluation of intensity measure performance in regional seismic risk assessment of reinforced concrete bridge inventories

AbstractSeismic risk assessment requires fragility functions derived using non-linear time-history analysis with earthquake records compatible with the site hazard and characterised via a suitable intensity measure (IM), which poses a challenge given the wide variety of structural characteristics found in bridge inventories. Given the lack of consensus on a suitable IM, regional studies often use peak ground acceleration (PGA), which despite being recognized as a poor indicator of structural performance, has persisted in earthquake response characterisation. Average spectral acceleration (AvgSa) has recently gained popularity since it describes earthquake intensity over a range of pertinent periods of vibration; however, its suitability as an IM has not been demonstrated on real bridge inventories with a wide variety of structural characteristics. In this study, hazard-consistent records selected for both PGA and AvgSa are used to evaluate the response of a large inventory of existing bridges with varying structural characteristics, from the Italian roadway network. The results indicate that AvgSa is a more accurate IM compared to PGA when applied to the regional assessment of RC bridges.

• Record URL:
  https://doi.org/10.1080/15732479.2021.1979599
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/15732479
• Supplemental Notes:
  • © 2021 Informa UK Limited, trading as Taylor & Francis Group 2021. Abstract reprinted with permission of Taylor & Francis.
• Authors:
  • Abarca, Andres
  • Monteiro, Ricardo
  • O’Reilly, Gerard
  • Zuccolo, Elisa
  • Borzi, Barbara
• Publication Date: 2023-6

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 760-778
• Serial:
  • Structure and Infrastructure Engineering
  • Volume: 19
  • Issue Number: 6
  • Publisher: Taylor & Francis
  • ISSN: 1573-2479
  • EISSN: 1744-8980
  • Serial URL: http://www.tandfonline.com/loi/nsie20

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Earthquakes; Reinforced concrete bridges; Risk assessment
• Geographic Terms: Italy
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Planning and Forecasting;

Filing Info

• Accession Number: 01875643
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 14 2023 3:10PM