Real, Scaled, Adjusted and Artificial Records: A Displacement and Cyclic Response Assessment

Iunio Iervolino*, Flavia de Luca, Edoardo Cosenza, Gaetano Manfredi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

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Different procedures to obtain sets of spectrum compatible records for nonlinear dynamic analysis of structures are compared in terms of post-elastic structural response. Six typologies of records are considered: un-scaled real records, real moderately linearly scaled, real significantly linearly scaled, real adjusted by wavelets, artificial generated by two different procedures. The study is spectral shape-based, that is, all sets of records considered, either generated or selected, match individually (artificial and adjusted) or on average (real records), the same design spectrum of a case-study site in Italy. Bilinear non-degrading single degree of freedom systems were used to evaluate the nonlinear response for the compared sets at different non-linearity levels; i.e., demand spectra in terms of peak and cyclic response were derived for two strength reduction factors. Results show that artificial or adjusted records may underestimate, at high non-linearity levels, the displacement-related non-linear response if compared to real records, which are considered as a benchmark. Conversely, if the cyclic response is considered, artificial record sets show a (more evident) overestimation of the demand, while wavelet-adjusted do not display a significant bias. Finally the two groups of linearly scaled records seem to show no systematic bias for both types of response considered, suggesting that scaling does not impair estimation of seismic response if the spectral shape is controlled.
Original languageEnglish
Title of host publicationAdvances in Performance-Based Earthquake Engineering
EditorsMicheal Fardis
PublisherSpringer, Dordrecht
Number of pages9
ISBN (Electronic)9789048187461
ISBN (Print)9789048187454
Publication statusPublished - 12 Jun 2010

Publication series

NameGeotechnical, Geological and Earthquake Engineering
PublisherSpringer Netherlands
ISSN (Print)1573-6059
ISSN (Electronic)1872-4671

Bibliographical note

Accepted for publication on 28 April 2010


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