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Regional-scale liquefaction analyses

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https://doi.org/10.1061/9780784484043.039

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Abstract

Regional-scale liquefaction hazard analyses are necessary for resilience planning and prioritization of seismic upgrades for critical distributed infrastructure such as levees, pipelines, roadways, and electrical transmission facilities. Two approaches are often considered for liquefaction hazard analysis of distributed infrastructure: (1) conventional, site-specific probe or borehole-based analyses, which do not quantify the uncertainty between investigation locations; or (2) surface geology-based analyses, which often neglect localized geotechnical properties and include a great amount of uncertainty. We describe an analytical method to unify the disparate site-specific and deposit-scale approaches using Gaussian processes. We use borehole data to produce spatial fields of random variables for liquefaction triggering analyses, such as groundwater elevation, soil texture classification, penetration resistance, and cyclic resistance ratio that converge to the site-specific uncertainty at sampling locations but also quantify the uncertainty in-between sampling locations. We demonstrate the effectiveness of Gaussian process models for regional-scale liquefaction hazard analyses in two example studies in Washington state and California, US.

Publication type Conference Paper
Publication Subtype Conference Paper
Title Regional-scale liquefaction analyses
DOI 10.1061/9780784484043.039
Year Published 2022
Language English
Publisher American Society of Civil Engineers
Contributing office(s) Earthquake Science Center
Description 10 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title Geo-Congress 2022: Geophysical and earthquake engineering and soil dynamics
First page 401
Last page 410
Conference Title Geo-Congress 2022
Conference Location Charlotte, NC
Conference Date March 20-23, 2022
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