Rupture parameter sensitivity of low frequency ground motion response spectra using synthetic scenarios in North Chile

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dc.catalogadoraba
dc.contributor.authorFortuño Jara, Catalina Pía
dc.contributor.authorLlera Martin, Juan Carlos de la
dc.contributor.authorGonzalez, Gabriel
dc.contributor.authorGonzalez, Juan
dc.contributor.authorAguirre Aparicio, Paula
dc.date.accessioned2023-03-14T16:33:39Z
dc.date.available2023-03-14T16:33:39Z
dc.date.issued2021
dc.description.abstractThis research performs a sensitivity analysis of response spectrum values for various physical earthquake parameters, which are used to generate synthetic seismograms consistent with the expected seismicity in north Chile. Sensitivity analyses are based on the earthquake scenario and slip distribution model of the 2014, M-w 8.1 Pisagua earthquake, and seven other physically plausible interplate events for north Chile. A finite-fault rupture model, and slip distribution of the Pisagua earthquake, were obtained using inversion of InSAR and GPS data. Three other rupture models based on previous studies of interplate locking for north Chile and capable of generating M-w 8.3-8.6 earthquakes with an estimated maximum slip of 9.2 m, were incorporated in the analyses. Also, four additional scenarios with moment magnitudes in the range M-w 8.6-8.9 were generated by concatenating these physical scenarios into larger rupture areas within the north segment. Using these scenarios, synthetic ground motions were built at four observation sites: Pisagua, Iquique, Tocopilla, and Calama. Response sensitivity was studied for three key rupture parameters: mean rupture velocity, slip rise-time, and rupture directivity. Responses selected were peak ground displacement (PGD), spectral pseudo-velocities, S-v, and spectral displacements, S-d. First and second order variations of PGD, S-v, and S-d relative to the source parameters were computed and used together with a Taylor series expansion to propagate uncertainty into the responses as a function of v(r) and rise-time t(r). To study the effect of rupture directivity, three different foci locations were considered for each scenario: north, south, and at the centroid of the slip model. Response PGD values show no clear trends with rupture velocity, v(r); however, the variability increases as the system period increases. The effect of the slip rise-time is significant, and as t(r) increases, the spectral responses tend to decrease, suggesting that shorter slip rise-times lead to higher seismic demands in long period structures. The results obtained for the directivity analysis suggest that two factors control the expected waveforms and spectral responses: first, the direction of the rupture relative to the location of each site, and the hypocentral distance.
dc.description.funderNational Research Center for Integrated Disaster Risk Management (CIGIDEN), ANID/FONDAP
dc.description.funderNLHPC
dc.description.funderFondecyt
dc.fechaingreso.objetodigital2023-03-14
dc.format.extent32 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10518-021-01113-0
dc.identifier.eissn1573-1456
dc.identifier.issn1570-761X
dc.identifier.scopusidSCOPUS_ID:85113713925
dc.identifier.urihttps://doi.org/10.1007/s10518-021-01113-0
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66574
dc.identifier.wosidWOS:000664007000001
dc.information.autorucEscuela de Ingeniería; Fortuño Jara Catalina Pia; ; 154917
dc.information.autorucEscuela de Ingeniería; De La Llera Martin Juan Carlos; 0000-0002-9064-0938; 53086
dc.information.autorucEscuela de Ingeniería; Aguirre Aparicio Paula Andrea; 000-0002-0899-3882; 5131
dc.issue.numero12
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final4864
dc.pagina.inicio4833
dc.publisherSPRINGER
dc.revistaBULLETIN OF EARTHQUAKE ENGINEERING
dc.rightsacceso restringido
dc.subjectSynthetic ground motions
dc.subjectEarthquake scenarios
dc.subjectSpectral response
dc.subjectSensitivity analysis
dc.subject14 NOVEMBER 2007
dc.subjectTOCOPILLA EARTHQUAKE
dc.subjectPREDICTION
dc.subjectTIME
dc.subjectDEFORMATION
dc.subjectMODELS
dc.subjectINSAR
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleRupture parameter sensitivity of low frequency ground motion response spectra using synthetic scenarios in North Chile
dc.typeartículo
dc.volumen19
sipa.codpersvinculados154917
sipa.codpersvinculados53086
sipa.codpersvinculados5131
sipa.indexWoS
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