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Dissertation/Thesis Abstract

Cycle Counting Procedures as Basis for Magnitude Scaling Effects in Liquefaction Risk Models
by Dombrowski, Anthony P., M.S., California State University, Long Beach, 2020, 169; 27833902
Abstract (Summary)

The seismic demand imposed by a ground motion is related to its amplitude and duration. The amplitude of the ground motion is usually represented by the Cyclic Stress Ratio (CSR) and the effects of the duration of a ground motion have usually been represented through an equivalent number of uniform amplitude cycles (N).

This thesis begins with a review of methods used to determine N, as well as important factors known to influence the evaluation of N. Discrepancies between the current cycle counting methods and the known influential factors are identified. A new procedure based on pore pressure generation is proposed and compared to two modern cycle counting procedures from the literature using a small suit of records in the NGA-West2 ground motion database. The study identified parameters that influenced the N results for all three procedures, including soil unit weight, depth, fines content, cycle amplitude, and cycle sequencing.

Indexing (document details)
Advisor: Star, Lisa
Commitee: Calabrese, Andrea, Rahmani, Mehran
School: California State University, Long Beach
Department: Civil Engineering & Construction Engineering Management
School Location: United States -- California
Source: MAI 82/3(E), Masters Abstracts International
Subjects: Civil engineering, Geological engineering, Geotechnology
Keywords: Cycle Counting Methods, Earthquake Engineering, Earthquake Risk Modeling, Geotechnical Engineering, Liquefaction
Publication Number: 27833902
ISBN: 9798664792164
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