Effect of number of records and their properties on the estimation of seismic demands by nonlinear analysis

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNResearchpeer-review

Abstract

Design codes tend to recommend a minimum number of scaled natural earthquake accelerograms as an option to model the seismic input for time-history analysis. However there is still debate as to what that minimum number of records must be to obtain meaningful results when dealing with non-linear inelastic analysis. This article addresses the issues related to the stability of assessed seismic demands as affected by the number of accelerograms used (and their properties) for time-history analysis. To that effect, a large number of inelastic analyses are conducted using a representative inelastic MDOF system. The seismic input is modelled using a database of accelerograms recorded on rock which have been previously used for the calibration of ground motion prediction equations in Europe and the Middle East. The seismic input is scaled to match the intensity of the standard EC8 design spectrum. Scaling criteria used in the study include amplitude and dual scaling (amplitude + time scaling) to comply with EC8 recommendations related to spectrum matching, as well as, by using an optimum spectrum intensity scale. Results are assessed in terms of the stability of the predicted seismic demands as affected by the size of the family of accelerograms used for the analyses (i.e. families made of 3,4,5,…,11 accelerograms), and by the degree of fitting between the design spectrum and the mean response spectrum of the scaled records of the family and by the scaling criterion.
Original languageEnglish
Title of host publicationProceedings of the 16th World Conference on Earthquake Engineering
Pages1-11
Number of pages11
Publication statusPublished - 9 Jan 2017
Event16th World Conference on Earthquake Engineering - Santiago, Chile
Duration: 9 Jan 201713 Jan 2017

Conference

Conference16th World Conference on Earthquake Engineering
Abbreviated title16WCEE
CountryChile
CitySantiago
Period9/01/1713/01/17

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history
ground motion
effect
demand
analysis
calibration
earthquake
prediction
rock
family
code
recommendation
Europe

Keywords

  • nonlinear time-history analysis
  • selection of earthquake records
  • time scaling
  • dual scaling
  • amplitude scaling

Cite this

Martinez-Rueda, J. (2017). Effect of number of records and their properties on the estimation of seismic demands by nonlinear analysis. In Proceedings of the 16th World Conference on Earthquake Engineering (pp. 1-11). [2021]
Martinez-Rueda, Juan. / Effect of number of records and their properties on the estimation of seismic demands by nonlinear analysis. Proceedings of the 16th World Conference on Earthquake Engineering. 2017. pp. 1-11
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abstract = "Design codes tend to recommend a minimum number of scaled natural earthquake accelerograms as an option to model the seismic input for time-history analysis. However there is still debate as to what that minimum number of records must be to obtain meaningful results when dealing with non-linear inelastic analysis. This article addresses the issues related to the stability of assessed seismic demands as affected by the number of accelerograms used (and their properties) for time-history analysis. To that effect, a large number of inelastic analyses are conducted using a representative inelastic MDOF system. The seismic input is modelled using a database of accelerograms recorded on rock which have been previously used for the calibration of ground motion prediction equations in Europe and the Middle East. The seismic input is scaled to match the intensity of the standard EC8 design spectrum. Scaling criteria used in the study include amplitude and dual scaling (amplitude + time scaling) to comply with EC8 recommendations related to spectrum matching, as well as, by using an optimum spectrum intensity scale. Results are assessed in terms of the stability of the predicted seismic demands as affected by the size of the family of accelerograms used for the analyses (i.e. families made of 3,4,5,…,11 accelerograms), and by the degree of fitting between the design spectrum and the mean response spectrum of the scaled records of the family and by the scaling criterion.",
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Martinez-Rueda, J 2017, Effect of number of records and their properties on the estimation of seismic demands by nonlinear analysis. in Proceedings of the 16th World Conference on Earthquake Engineering., 2021, pp. 1-11, 16th World Conference on Earthquake Engineering, Santiago, Chile, 9/01/17.

Effect of number of records and their properties on the estimation of seismic demands by nonlinear analysis. / Martinez-Rueda, Juan.

Proceedings of the 16th World Conference on Earthquake Engineering. 2017. p. 1-11 2021.

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNResearchpeer-review

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Martinez-Rueda J. Effect of number of records and their properties on the estimation of seismic demands by nonlinear analysis. In Proceedings of the 16th World Conference on Earthquake Engineering. 2017. p. 1-11. 2021