CIGIDEN

Project Title

CIGIDEN

Partner Organisations

Pontificia Universidad Católica de Chile

Internal ID

15110017

Principal Investigator

RODRIGO CIENFUEGOS

Type

basic research

Status

TERMINADO

Start Date

January 1, 2013

End Date

December 31, 2018

Investigators

CANDIA AGUSTI, GABRIEL ALFONSO

Organisations

Facultad de Ingeniería

Universidad Técnica Federico Santa María

Publications

Now showing 1 - 10 of 11

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Machine learning techniques for estimating seismic site amplification in the Santiago basin, Chile
(2022)
J.P. Díaz
;
E. Sáez
;
M. Monsalve
;
CANDIA AGUSTI, GABRIEL ALFONSO
;
F. Aron
2Scopus© Citations 16
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Effectiveness of an inactivated SARS-CoV-2 vaccine in children and adolescents: a large-scale observational study
(2023)
Alejandro Jara
;
Eduardo A. Undurraga
;
Juan Carlos Flores
;
José R. Zubizarreta
;
Cecilia González
Scopus© Citations 10 7
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Children's views on evacuation drills and school preparedness: Mapping experiences and unfolding perspectives
(2018)
Andrea Vásquez
;
Katitza Marinkovic
;
MARGARITA MARIA BERNALES SILVA
;
Jorge León
;
Juan González
17Scopus© Citations 33
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Experiences and perceptions of natural hazards among international migrants living in Valparaiso, Chile
(2019)
MARGARITA MARIA BERNALES SILVA
;
P. Repetto
;
A. McIntyre
;
A. Vasquez
;
J. Drury
9Scopus© Citations 8
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Collapse risk assessment of a Chilean dual wall-frame reinforced concrete office building
(2019)
G. Araya-Letelier
;
P.F. Parra
;
D. Lopez-Garcia
;
A. Garcia-Valdes
;
CANDIA AGUSTI, GABRIEL ALFONSO
Scopus© Citations 24 1
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Ground Motion Correlations from Recorded Mexican Intermediate-depth, Intraslab Earthquakes
(2021)
Miguel A. Jaimes
;
CANDIA AGUSTI, GABRIEL ALFONSO
;
Alhelí S. López-Castañeda
;
Jorge Macedo
Scopus© Citations 3 1
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Performance-based assessment of the seismic pseudo-static coefficient used in slope stability analysis
(2020)
Jorge Macedo
;
CANDIA AGUSTI, GABRIEL ALFONSO
Scopus© Citations 42 2
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Horizontal and Vertical Ground-Motion Duration Prediction Models from Interplate and Intermediate-Depth Intraslab Earthquakes in Mexico City
(2024)
Miguel A. Jaimes
;
Adrián D. García-Soto
;
CANDIA AGUSTI, GABRIEL ALFONSO
In this study, we present predictive models for significant ground-motion duration from interplate and intermediate-depth intraslab earthquakes at Mexico City for the horizontal components, the vertical component, and the vertical-to-horizontal ratio case. The considered sites are located over several zones in Mexico City, from rock to soft-soil sites. For the ground-motion duration models, the significant durations for ranges between 5% and 75%, 5% and 95%, and 2.5% and 97.5% of Arias intensity are considered for the analyses. The equations were developed as functions of magnitude, distance of the earthquake, and site period using 16 and 23 event recordings from interplate and intermediate-depth intraslab earthquakes at the hill, transition, and lakebed zones of the city using mixed-effect regression analyses. For the intraslab events, in particular, the new database includes recordings from two significant normal-faulting events that occurred in 2017. The models lead to differences with respect to the previous models. Therefore, predictive models for both considered focal mechanisms are proposed. The model is valid for interplate events at distances from 280 to 500 km and magnitude Mw from 6 to 8.1, for intraslab events at distances of 100 km up to about 650 km, magnitude Mw from 5 to 8.2, and focal depths from 40 km to over 120 km.
3Scopus© Citations 2
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Holistic rockfall risk assessment in high mountain areas affected by seismic activity: Application to the Uspallata valley, Central Andes, Chile
(2023)
Manon Farvacque
;
Nicolas Eckert
;
CANDIA AGUSTI, GABRIEL ALFONSO
;
Franck Bourrier
;
Christophe Corona
<jats:title>Abstract</jats:title><jats:p>Over large regions exposed to natural disasters, cascading effects resulting from complex or concatenated natural processes may represent a large portion of total risk. Populated high‐mountain environments are a major concern, and methods for large‐scale quantitative risk analyses are urgently required to improve risk mitigation. This article presents a comprehensive quantitative rockfall risk assessment over a large archetypal valley of the Andean mountains, in Central Chile, which integrates a wide spectrum of elements at risk. Risk is expressed as an expected damage both in monetary terms and casualties, at different scales relevant for decision making. Notably, total rockfall risk is divided into its main drivers, which allows quantifying seismically induced rockfall risk. For this purpose, the local seismic hazard is quantified and the yield acceleration, that is, acceleration required to initiate rockfall, is determined at the regional scale. The probability of failure is thereafter derived in terms of annual frequency of rockfall initiation and integrated in the quantitative risk assessment (QRA) process. Our results show the significant role of seismic activity as the triggering mechanism of rockfalls, and highlight elements at risk that have a major contribution to the total risk. Eventually a sensitivity analysis is conducted to (i) assess the robustness of obtained risk estimates to the data and modeling choices and (ii) identify the most influential assumptions. Our approach evidences the feasibility of large‐scale QRAs in sensitive environments and opens perspectives for refining QRAs in similar territories significantly affected by cascading effects and multihazards.</jats:p>
Scopus© Citations 3 1
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Effectiveness of an Inactivated SARS-CoV-2 Vaccine in Chile
(2021)
Alejandro Jara
;
Eduardo A. Undurraga
;
Cecilia González
;
Fabio Paredes
;
Tomás Fontecilla
Scopus© Citations 665 5

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