자료유형  

 학위논문

Control Number  

0016933893

International Standard Book Number  

9798379912956

Dewey Decimal Classification Number  

624

Main Entry-Personal Name  

Rasanen, Ryan A.

Publication, Distribution, etc. (Imprint  

[S.l.] : University of Washington., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(323 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

General Note  

Advisor: Maurer, Brett.

Dissertation Note  

Thesis (Ph.D.)--University of Washington, 2023.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약In regions of infrequent moderate-to-large earthquakes, historic earthquake catalogs are often insufficient to provide inputs to seismic-hazard analyses (i.e., fault locations and magnitude-frequency relations) or to inform ground-motion predictions for certain seismic sources. As a result, analyses of macroseismic evidence (e.g., landslides, liquefaction, and felt intensities) are commonly used to help elucidate the seismic record, thereby reducing seismic-hazard uncertainty. However, while paleoseismic studies have been performed widely, existing inverse-analysis techniques (i.e., to constrain the causative earthquake magnitude and/or ground motions) have several shortcomings. Foremost, they are generally deterministic and require that the location of fault rupture be known, when in reality there are numerous uncertainties, and the source location is typically unknown. Accordingly, this dissertation (1) proposes a novel, flexible inversion methodology for analyzing paleoseismic evidence, resulting in probabilistic constraint of the seismic-source parameters (e.g., rupture location and magnitude), to the degree that the observational evidence permits. Following from (1), the methodology is tested using simulated paleoseismic studies of modern (2) liquefaction and (3) landslides. Following these simulated studies, from which lessons for forward use are gleaned, the methodology is (4) applied to evidence produced by the 1886 Charleston, SC earthquake, thereby constraining its seismic source in a more complete and transparent manner than previously available. Next, paleoliquefaction evidence in the U.S. Pacific Northwest (PNW) is (5) compiled into a community database and liquefaction in an Mw9 Cascadia Subduction Zone (CSZ) event is forecasted regionally using 30 different physics-based ground motion realizations and a first-order geospatial liquefaction model. These products are (6) made available as an online database so that others may study, and benefit from, the compiled data. Lastly, liquefaction resulting from Mw9 CSZ earthquakes is predicted at select locations using subsurface test data and more advanced geotechnical methods. As a precursor, (7) liquefaction models based on the cone penetration test (CPT) are tested in the PNW via compilation and analysis of case histories from the 2001 Nisqually, WA, earthquake. Following model testing, (8) Mw9 liquefaction is predicted for each of the 30 ground-motion simulations at 400 locations where CPT data is available. These predictions suggest that liquefaction could be both pervasive in the region and affect numerous significant hubs of population, transportation, and commerce. These predictions are compared to the evidence from (5) to assess which of the 30 simulations represent more and less plausible realizations of the motions experienced in 1700. This comparison suggests that all simulations predict far more liquefaction than has been found and that shaking intensities in 1700 may have been less in inland hubs (e.g., Seattle, Portland, and Vancouver), than prevailing forecasts indicate. The uncertainties associated with this possibility are discussed in detail.

Subject Added Entry-Topical Term  

Civil engineering.

Subject Added Entry-Topical Term  

Geophysics.

Index Term-Uncontrolled  

Cascadia Subduction Zone

Index Term-Uncontrolled  

Earthquake

Index Term-Uncontrolled  

Liquefaction

Index Term-Uncontrolled  

Nisqually earthquake

Index Term-Uncontrolled  

Paleoseismology

Index Term-Uncontrolled  

Seismic Hazard

Added Entry-Corporate Name  

University of Washington Civil and Environmental Engineering

Host Item Entry  

Dissertations Abstracts International. 85-01B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:639135