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.
|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|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be