Toward validation of simulated accelerograms via prediction equations for nonlinear SDOF response

F. De Luca*, G. Ameri, I. Iervolino, F. Pacor, D. Bindi

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)
171 Downloads (Pure)

Abstract

Seismic structural risk analysis of critical facilities may require nonlinear dynamic analysis for which record selection is one of the key issues. Notwithstanding the increasing availability of database of strong-motion records, it may be hard to find accelerograms that fit a specific scenario (e.g., in terms of magnitude and distance) resulting from hazard assessment at the site of interest. A possible, alternative, approach can be the use of artificial and/or simulated ground motion in lieu of real records. Their employment requires systematic engineering validation in terms of structural response and/or seismic risk. Prediction equations for peak and cyclic inelastic single degree of freedom systems' response, based on Italian accelerometric data, are discussed in this study as a possible benchmark, alongside real record counterparts, for the validation of synthetic records. Even if multiple events would be in principle required, an extremely preliminary validation is carried out considering only four simulated records of the 1980 Irpinia (southern Italy) Mw 6.9 earthquake. Simulated records are obtained through a broadband hybrid integral-composite technique. Results show how this simulation method may lead to generally acceptable results. It is also emphasized how this kind of validation may provide additional results with respect to classical signal-to-signal comparison of real and simulated records.

Original languageEnglish
Pages (from-to)85-101
Number of pages17
JournalBollettino di geofisica teorica ed applicata
Volume55
Issue number1
DOIs
Publication statusPublished - Mar 2014

Bibliographical note

Accepted on 8 July 2013

Keywords

  • seismic risk
  • critical facilities
  • simulated strong motion

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