Strong ground motion simulation of the 2015 Illapel earthquake using corrected empirical Green’s functions

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dc.contributor.authorFernández Soto, Claudio
dc.contributor.authorAguirre Aparicio, Paula
dc.contributor.authorLlera Martin, Juan Carlos de la
dc.contributor.authorCandia, Gabriel A.
dc.contributor.authorNozu, A.
dc.date.accessioned2023-01-16T16:36:37Z
dc.date.available2023-01-16T16:36:37Z
dc.date.issued2017
dc.description.abstractThe September 16th 2015 Illapel, Chile, earthquake (Mw 8.4) generated a good set of aftershock data that enabled us to develop and to validate a model for synthetic ground motion generation. This study presents a methodology to generate strong ground motions based on site amplification and phase characteristics of seismic waves, and also based on a source model that was newly developed for the earthquake. The methodology includes the superposition of corrected empirical Green’s functions that consider the three effects: source, path and site. The path effects incorporate the attenuation of seismic waves between the source and the recording stations, and include both geometric spreading and inelastic attenuation. Weak motion data obtained at the strong-motion stations was used to evaluate empirical site amplification factors. For this purpose, aftershocks recorded during the first three months after the main shock were used. Furthermore, the phase characteristics of the Green’s functions were determined based on the weak motion data recorded at the stations. The source model involves two SPGAs (strong-motion pulse generation areas). The locations of the SPGAs were basically determined based on the arrival times of the velocity pulses. The SPGA sizes were chosen according to the pulse duration. The methodology was validated using observed records in terms of velocity waveforms and Fourier spectra. According to the results, the velocity waveforms including pulses were well reproduced in a frequency range of interest to structural engineering (0.2 to 1 Hz). The agreement between the simulated and measured waveforms makes this model a strong platform to assess hazard at specific sites where detailed hazard assessment is required.
dc.format.extent11 páginas
dc.fuente.origenSIPA
dc.identifier.urihttps://www.wcee.nicee.org/wcee/article/16WCEE/WCEE2017-4425.pdf
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66345
dc.information.autorucEscuela de ingeniería ; Aguirre Aparicio, Paula ; S/I ; 5131
dc.information.autorucEscuela de ingeniería ; Llera Martin, Juan Carlos de la ; 0000-0002-9064-0938 ; 53086
dc.language.isoen
dc.nota.accesoContenido completo
dc.publisherNational Information Centre of Earthquake Engineering
dc.relation.ispartofWorld Conference on Earthquake Engineering (16° : 2017 : Santiago, Chile)
dc.rightsacceso abierto
dc.subjectStrong ground motion
dc.subjectIllapel earthquake
dc.subjectCorrected empirical Green’s functions
dc.subjectSite effects
dc.titleStrong ground motion simulation of the 2015 Illapel earthquake using corrected empirical Green’s functions
dc.typecomunicación de congreso
sipa.codpersvinculados5131
sipa.codpersvinculados53086
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