Input motion set selection for nonlinear dynamic structural analysis is commonly based on spectral compatibility, obtained through the uniform scaling of natural signals. Due to the aleatory nature of the expected time history, alone spectral compatibility requirement appears very weak to guarantee scaled ground motions that suit local seismic hazard. Magnitude-Distance interval pairs to control selection and scaling factor thresholds do not always provide input motions with adequate energy levels. In order to tackle these critical issues, a novel computer aided selection method based on consistency analysis to provide conservative energy levels has been devel oped. The method equalizes the ground motions subject to the spectral compatibility process to the modified Housner Intensity of the hazard spectra. A multi-parametric consistency analysis based on statistic confidence is performed on the equalized (by uniform scaling) ground motion set by comparing it with the larger regional natural dataset on the same Magnitude-Distance pairs. The consistency analysis involves multiple ground motion parameters taken into relation with the focal mechanism too. Sensitivity tests show the capability of the method to reach high spectral compatibility joined with high consistency degrees by multi-parametric calibration. Compared with the traditional ones, this method also shows greater performance in composing ground motion sets close to real occurrences with a more assorted spectral frequency distribution.

SHAKER: A selector of consistent and energetically equalized natural ground motions using the Italian earthquake database / Grelle, Gerardo; Sappa, Giuseppe; Madiai, Claudia. - In: ENGINEERING GEOLOGY. - ISSN 0013-7952. - 316:(2023). [10.1016/j.enggeo.2023.107046]

SHAKER: A selector of consistent and energetically equalized natural ground motions using the Italian earthquake database

Grelle, Gerardo
;
Sappa, Giuseppe;
2023

Abstract

Input motion set selection for nonlinear dynamic structural analysis is commonly based on spectral compatibility, obtained through the uniform scaling of natural signals. Due to the aleatory nature of the expected time history, alone spectral compatibility requirement appears very weak to guarantee scaled ground motions that suit local seismic hazard. Magnitude-Distance interval pairs to control selection and scaling factor thresholds do not always provide input motions with adequate energy levels. In order to tackle these critical issues, a novel computer aided selection method based on consistency analysis to provide conservative energy levels has been devel oped. The method equalizes the ground motions subject to the spectral compatibility process to the modified Housner Intensity of the hazard spectra. A multi-parametric consistency analysis based on statistic confidence is performed on the equalized (by uniform scaling) ground motion set by comparing it with the larger regional natural dataset on the same Magnitude-Distance pairs. The consistency analysis involves multiple ground motion parameters taken into relation with the focal mechanism too. Sensitivity tests show the capability of the method to reach high spectral compatibility joined with high consistency degrees by multi-parametric calibration. Compared with the traditional ones, this method also shows greater performance in composing ground motion sets close to real occurrences with a more assorted spectral frequency distribution.
2023
seismic hazard; ground motions selector tool; housner Intensity; ground motion parametrization; consistency analysis
01 Pubblicazione su rivista::01a Articolo in rivista
SHAKER: A selector of consistent and energetically equalized natural ground motions using the Italian earthquake database / Grelle, Gerardo; Sappa, Giuseppe; Madiai, Claudia. - In: ENGINEERING GEOLOGY. - ISSN 0013-7952. - 316:(2023). [10.1016/j.enggeo.2023.107046]
File allegati a questo prodotto
File Dimensione Formato  
Shaker_ver1.4.zip

accesso aperto

Note: Aim and short guide of Shaker 1.4 beta
Tipologia: Altro materiale allegato
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 179.42 MB
Formato Zip File
179.42 MB Zip File
Grelle_SHAKER-a-selector_2023.pdf

embargo fino al 24/02/2025

Note: articolo
Tipologia: Documento in Post-print (versione successiva alla peer review e accettata per la pubblicazione)
Licenza: Creative commons
Dimensione 1.48 MB
Formato Adobe PDF
1.48 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1676964
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact