Synthetic Hybrid Broadband Seismograms Based on InSAR Coseismic Displacements

Simple item page
dc.catalogadoryvc
dc.contributor.authorFortuño Jara, Catalina Pía
dc.contributor.authorLlera Martin, Juan Carlos de la
dc.contributor.authorWicks, Charles W.
dc.contributor.authorAbell, José A.
dc.date.accessioned2020-10-09T01:24:00Z
dc.date.available2020-10-09T01:24:00Z
dc.date.issued2014
dc.description.abstractConventional acceleration records do not properly account for the observed coseismic ground displacements, thus leading to an inaccurate definition of the seismic demand needed for the design of flexible (long period) structures. Large coseismic displacements observed during the 27 February 2010 Maule earthquake suggest that this effect should be included in the design of flexible structures by modifying the design ground motions and spectra considered. Consequently, Green's functions are used herein to compute synthetic low-frequency seismograms that are consistent with the coseismic displacement field obtained from interferometry using synthetic aperture radar (SAR) images. In this case, the coseismic displacement field was determined by interfering twenty SAR images of the Advanced Land Observation Satellite (ALOS)/PALSAR satellite taken between 12 October 2007 and 28 May 2010. These images cover the region affected by the 2010 M-w 8.8 Maule earthquake. Synthetic broadband seismograms are built by superimposing the low-pass filtered synthetic low-frequency seismograms with high-frequency strong-motion data. The broadband seismograms generated are then consistent with the coseismic displacement field and the high-frequency content of the earthquake. A sensitivity analysis is performed using three different fault and slip parameters, the rupture velocity, the corner frequency, and the slip rise time. Results show that the optimal corner frequency of the low-pass filter f(c) = 1/T-c, leads to a trade-off between acceleration and displacement accuracy. Furthermore, spectral response for long periods, say T >= 8 s, is relatively insensitive to the value of T-c, whereas shorter periods are strongly dependent on both the slip rise time and T-c. In general, larger displacements consistent with coseismic data are obtained using this technique instead of digitally processing the acceleration ground-motion records.
dc.fechaingreso.objetodigital2020-10-09
dc.fuente.origenConveris
dc.identifier.doi10.1785/0120130293
dc.identifier.issn0037-1106
dc.identifier.urihttps://doi.org/10.1785/0120130293
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/47111
dc.information.autorucESCUELA DE INGENIERÍA;LLERA MARTIN, JUAN CARLOS DE LA;0000-0002-9064-0938;53086
dc.information.autorucESCUELA DE INGENIERÍA;FORTUÑO JARA, CATALINA PÍA;S/I;154917
dc.issue.numero6
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final2754
dc.pagina.inicio2735
dc.revistaBulletin of the Seismological Society of Americaes_ES
dc.rightsacceso restringido
dc.rightsacceso restringido
dc.titleSynthetic Hybrid Broadband Seismograms Based on InSAR Coseismic Displacementses_ES
dc.typeartículo
dc.volumen104
sipa.codpersvinculados53086
sipa.codpersvinculados154917
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Synthetic Hybrid Broadband Seismograms Based on InSAR Coseismic Displacements.pdf
Size:
99.9 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas