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

Pierre Gehl, John Douglas, Tiziana Rossetto, Joshua Macabuag, Arash Nassirpour, Stylianos Minas, Philippe Duffour

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

2 Citations (Scopus)
10 Downloads (Pure)

Abstract

In performance-based earthquake engineering, fragility curves constitute an essential component, providing a probabilistic link between the earthquake intensity measure and the structural response, expressed as an engineering demand parameter. In this study, we apply a capacity spectrum method that uses inelastic response spectra derived from earthquake accelerograms to construct fragility curves for an example reinforced concrete structure. This approach has the advantage of simplicity and rapidity over methods using the accelerograms directly. Various sets of scaled and unscaled accelerograms are used to investigate the impact of record-to-record variability on the derived curves. It is found that the variability in the input spectra at periods longer than the natural period of the undamaged structure has a direct impact on the standard deviation associated with the curves. When the spectra closely match a target, the curves are almost vertical (small standard deviations); but, as the variation around the target increases ,the curves become flatter (high standard deviations). A variant of the peak-to-trough measure introduced by Stafford and Bommer (2010) provides a useful way of measuring the variability in the input spectra.
Original languageEnglish
Title of host publicationVulnerability, Uncertainty, and Risk
Subtitle of host publicationQuantification, Mitigation, and Management
EditorsMichael Beer, Siu-Kui Au, Jim W. Hall
Place of PublicationReston, Virginia
PublisherAmerican Society of Civil Engineers (ASCE)
Pages1675-1684
Number of pages11
ISBN (Print)9780784413609
DOIs
Publication statusPublished - 7 Jul 2014
Event2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014 - Liverpool, United Kingdom
Duration: 13 Jul 201416 Jul 2014

Conference

Conference2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014
CountryUnited Kingdom
CityLiverpool
Period13/07/1416/07/14

Keywords

  • earthquake engineering
  • fragility curves
  • structural response

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