Geological and geotechnical investigation of the seismic ground response characteristics in some urban and suburban sites in Chile exposed to large seismic threats

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dc.contributor.authorMaringue, Jose
dc.contributor.authorMendoza, Laura
dc.contributor.authorSaez, Esteban
dc.contributor.authorYanez, Gonzalo
dc.contributor.authorMontalva, Gonzalo
dc.contributor.authorSoto, Valeria
dc.contributor.authorAyala, Felipe
dc.contributor.authorPerez-Estay, Nicolas
dc.contributor.authorFigueroa, Ronny
dc.contributor.authorSepulveda, Natalia
dc.contributor.authorGalvez, Carlos
dc.contributor.authorRamirez, Paola
dc.contributor.authorOvalle, Carlos
dc.date.accessioned2025-01-20T21:07:01Z
dc.date.available2025-01-20T21:07:01Z
dc.date.issued2022
dc.description.abstractThe central area of Chile's Valparaiso Region has been classified as a seismic gap for a major earthquake, which makes it very important to understand the seismic hazard of the zone. Generally, seismic codes consider a qualitative classification of sites to estimate the possible damage in the case of an earthquake scenario. Estimating the values of acceleration could be very important to prevent damages and increase preparedness for these rare events. In this research, a qualitative and quantitative estimation of seismic hazard is performed in the study area (Valparaiso region between Papudo and San Antonio 32 degrees-34 degrees S). This is achieved through an integrated and relatively economical approach which considers the information from Geology, Geophysical experiments (Gravity and seismic methods), and Geotechnical analyses. The results of the geophysical survey and geology information allow dividing the zone into five site types through a new proposal of site classification that depends not only on the V-s30,V- but also on the sites predominant period (T-0), which is an innovation of this work for the Chilean code. The Peak Ground Acceleration (PGA) values in the study zone were estimated using a Ground Motion Predictive Equation developed for the Chilean subduction zone. Additionally, we consider three different seismic scenarios according to the history of events in Central Chile. The results of this quantitative analysis show PGA values up to 0.52 g for the median and 1.2 g for the 84th percentile of the scenarios. Overall, the highest accelerations (PGA) are in zones with low shear wave velocities (< 500 m/s), a long predominant period (> 0.4 s) and where geology establishes the presence of low stiffness soils. The comparison of response spectra from the model against records from 2010 Maule and 1985 Valparaiso earthquakes shows available models tend to overpredict the intensities.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10518-022-01401-3
dc.identifier.eissn1573-1456
dc.identifier.issn1570-761X
dc.identifier.urihttps://doi.org/10.1007/s10518-022-01401-3
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93387
dc.identifier.wosidWOS:000800754400002
dc.issue.numero10
dc.language.isoen
dc.pagina.final4918
dc.pagina.inicio4895
dc.revistaBulletin of earthquake engineering
dc.rightsacceso restringido
dc.subjectSeismic methods
dc.subjectSite amplification attenuation models
dc.subjectSeismic microzoning
dc.subjectSeismic hazard
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleGeological and geotechnical investigation of the seismic ground response characteristics in some urban and suburban sites in Chile exposed to large seismic threats
dc.typeartículo
dc.volumen20
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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