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Author (up) Pasten, C.; Campos, F.; Ochoa-Cornejo, F.; Ruiz, S.; Valdebenito, G.; Alvarado, D.; Leyton, F.; Moffat, R.
Title The Role of Site Conditions on the Structural Damage in the City of Valdivia during the 22 May 1960 Mw 9.5 Megathrust Chile Earthquake Type
Year 2021 Publication Seismological Research Letters Abbreviated Journal Seismol. Res. Lett.
Volume 92 Issue 6 Pages 3437-3451
Keywords
Abstract The 22 May 1960 Mw 9.5 Valdivia megathrust earthquake, with a rupture length close to 1000 km in the central-south Chile, is the largest recorded earthquake in the modern times. The city of Valdivia is located about 300 km south of the northern boundary of the rupture in front of one of the largest asperities of the earthquake. In this article, we analyze the geology of the city and results from geophysical exploration methods that could explain the observed pattern of structural earthquake-induced damage. Surface waves methods results indicate that the soils in Valdivia have shear-wave velocity in the upper 30 m VS30 ranging from 150 to 300 m=s, whereas horizontal-to-vertical spectral ratios (HVSRs) calculated from ambient seismic noise show predominant vibration periods between 0.6 and 1.4 s. The housing stock in Valdivia at the time of the earthquake mainly consisted of one- and two-story wooden buildings, and fewer masonry and reinforcedconcrete buildings. Our reinterpretation of the data indicates that despite the large seismic demand and the low shear-wave velocities, well-designed, well-constructed, and founded structures were barely damaged. Most of the structural damage concentrated in hybrid structural systems, poorly designed and constructed structures, and structures with deficient foundations build over uncontrolled backfills that experienced lateral movement and differential settlement. The predominant vibration periods from the HVSR do not correlate with the most damaged areas, but it seems to correlate with the depth of the soil deposit. The reduced damage of the larger structures in the city at the time of the earthquake may be partially explained because their vibration periods did not resonate with the predominant vibration period of the soil, in addition to their large structural redundancy.
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0895-0695 ISBN Medium
Area Expedition Conference
Notes WOS:000714685300002 Approved
Call Number UAI @ alexi.delcanto @ Serial 1492
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Author (up) Sanchez-Lopez, M.; Moreno, R.; Alvarado, D.; Suazo-Martinez, C.; Negrete-Pincetic, M.; Olivares, D.; Sepulveda, C.; Otarola, H.; Basso, LJ.
Title The diverse impacts of COVID-19 on electricity demand: The case of Chile Type
Year 2022 Publication International Journal of Electrical Power & Energy Systems Abbreviated Journal Int. J. Electr. Power Energy Syst.
Volume 138 Issue Pages 107883
Keywords Electricity demand; COVID-19; Smart meters; Energy policy
Abstract This paper analyzes the impacts of the first wave of COVID-19 (March 2020 -September 2020) on the electricity demand of different types of consumers in Chile, including residential, commercial, and industrial demand. We leverage data from 230 thousand smart meters of residential and commercial consumers in 32 communes of Santiago (the capital city of Chile), which allows us to investigate the evolution of their demands with an hourly temporal resolution. Additionally, we use demand data of large industrial consumers provided by the Chilean system operator to study the impact of the pandemic on different economic sectors. This paper demonstrates that the COVID-19 pandemic, and the associated containment measures, have featured a drastically different impact on the various types of consumers in Chile. In particular, we show that the demand of residential consumers has increased throughout the first wave, even when we isolate the effects of the pandemic from those related to weather. Furthermore, we study how these effects change in different communes of Santiago, contrasting our findings with the socio-economic levels of the population. In effect, we find different demand response patterns depending on the socio-economic background of consumers. We also show that commercial demand has significantly declined due to the containment measures implemented and that the hospitality and construction economic sectors have been the most affected in the country.
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0142-0615 ISBN Medium
Area Expedition Conference
Notes WOS:000792889600004 Approved
Call Number UAI @ alexi.delcanto @ Serial 1587
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