The use of nonlinear dynamic analysis provides significant uncertainties on the seismic demand, especially when recorded ground motions are used. As these uncertainties strongly depend on ground motion selection and modification (GMSM) methods, a spectrum-compatibility criterion and a method based on the minimization of the scaling factor are compared in this work. The variability of a representative engineering demand parameter (EDP), obtained by subjecting ten reinforced concrete structures to different groups of records, is investigated through a sensitivity study based on the “Tornado diagram analysis.” The results show that the variability of the structural demand produced by the variation of the ground motion profile amplifies significantly with the increase in complexity and irregularity of the structures. More specifically, for regular structures, the selected GMSM criteria provide very similar variability while with the increase of irregularities, the spectrum-compatibility criterion produces a minimization of the demand uncertainty.
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Research Article|
November 01, 2014
Seismic Demand Sensitivity of Reinforced Concrete Structures to Ground Motion Selection and Modification Methods
Cristina Cantagallo;
a
Dipartimento di Ingegneria e Geologia, University “G. D'Annunzio” of Chieti-Pescara, Italy,E-mail addresses: cristina.cantagallo@unich.it
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Guido Camata;
a
Dipartimento di Ingegneria e Geologia, University “G. D'Annunzio” of Chieti-Pescara, Italy,
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Enrico Spacone
a
Dipartimento di Ingegneria e Geologia, University “G. D'Annunzio” of Chieti-Pescara, Italy,
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Earthquake Spectra (2014) 30 (4): 1449–1465.
Article history
received:
28 Jun 2012
accepted:
05 Mar 2013
first online:
01 Jun 2020
Citation
Cristina Cantagallo, Guido Camata, Enrico Spacone; Seismic Demand Sensitivity of Reinforced Concrete Structures to Ground Motion Selection and Modification Methods. Earthquake Spectra 2014;; 30 (4): 1449–1465. doi: https://doi.org/10.1193/062812EQS226M
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