Canyon topography effects on ground motion: Assessment of different soil stiffness profiles

Solans, David; Skiada, E; Kontoe, Stavroula; Potts, David M.

doi:10.4067/s0718-28132019000100051

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…There are sufficient observations following destructive earthquakes to form the conclusion that damage concentration occurs near or at the top of a valley or a steep topographic relief, which is defined as site effects. Site effects are closely influenced by the presence of very steep or asymmetric topographic reliefs—for example, escarpments and canyons—or complex geotechnical and geological features—for example, presence of colluvial or alluvial soils, internal fill structure and inhomogeneity, bedrock geology and contrast impedance, and presence of faults— (Gazetas, 1987; Gazetas and Dakoulas, 1992; Solans et al, 2019). In recent years, the influence of irregular topographies on ground motion characteristics has been well documented.…”

Section: Background Literaturementioning

confidence: 99%

Site effects of the Denis-Perron dam (SM-3): A case study in Eastern North America

2021

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Eastern North America (ENA) is part of a region with low-to-moderate seismicity; nonetheless, some significant seismic events have occurred in the last few decades. Recent events have reemphasized the need to review ENA seismicity and ground motion models, along with continually reevaluating and updating procedures related to the seismic safety assessment of hydroelectric infrastructures, particularly large dams in Québec. Furthermore, recent researchers have shown that site-specific characteristics, topography, and valley shapes may significantly aggravate the severity of ground motions. To the best of our knowledge, very few instrumental data from actual earthquakes have been published for examining the site effects of hydroelectric dam structures located in eastern Canada. This article presents an analysis of three small earthquakes that occurred in 1999 and 2002 at the Denis-Perron (SM-3) dam. This dam, the highest in Québec, is a rockfill embankment structure with a height of 171 m and a length of 378 m; it is located in a narrow valley. The ground motion datasets of these earthquakes include the bedrock and dam crest three-component accelerometer recordings. Ground motions are analyzed both in the time and frequency domains. The spectral ratios and transfer functions obtained from these small earthquakes provide new insights into the directionality of resonant frequencies, vibration modes, and site effects for the Denis-Perron dam. The crest amplifications observed for this dam are also compared with previously published data for large dams. New statistical relationships are proposed to establish dam crest amplification on the basis of the peak ground acceleration (PGA) at the foundation.

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Section: Background Literaturementioning

confidence: 99%

Site effects of the Denis-Perron dam (SM-3): A case study in Eastern North America

2021

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Investigation of seismic response of liquefiable canyon ground considering topography effect

Xie

Wan

et al. 2022

Bull Earthquake Eng

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Approximate decoupling of topographic, stratigraphic and valley effects on the peak seismic acceleration

di Lernia,

Papadimitriou,

Elia

2024

Soil Dynamics and Earthquake Engineering

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Canyon topography effects on ground motion: Assessment of different soil stiffness profiles

Abstract: Efectos de topografía de cañón en movimientos sísmicos: Evaluación de diferentes perfiles de rigidez del suelo

Cited by 3 publications

References 14 publications

Site effects of the Denis-Perron dam (SM-3): A case study in Eastern North America

Site effects of the Denis-Perron dam (SM-3): A case study in Eastern North America

Investigation of seismic response of liquefiable canyon ground considering topography effect

Approximate decoupling of topographic, stratigraphic and valley effects on the peak seismic acceleration

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