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Rational Selection of Pseudostatic Seismic Coefficient of Slopes

Rational Selection of Pseudostatic Seismic Coefficient of Slopes In this paper, the horizontal seismic coefficient of Nazloo landfill for quasi-static analysis is determined in two steps. In the first step, a probabilistic seismic hazard analysis is performed on the landfill site. For this purpose, active faults, historical and instrumental earthquakes within a specific radius of the site are identified and the final earthquake catalogue is determined after applying temporal–spatial windows. Then, the area under study is partitioned into multiple zones and the Gutenberg–Richter parameters for each zone are determined. Subsequently, the seismic characteristics of the faults and the attenuation equations are used to obtain the site design spectrum. The results are then used to produce a series of artificial seismic records in a way that their response spectra match the computed site design spectrum. In the second step, the resulting records are applied to the landfill and a Newmark type dynamic analysis is used to estimate the permanent displacement of the landfill. Pseudostatic seismic coefficient corresponds to a uniform ground acceleration over the effective earthquake duration which produces Newmark permanent displacement similar to that of the artificial earthquake. Therefore, the pseudostatic seismic coefficient is calculated by trial and error procedure. Finally, the computed horizontal pseudostatic seismic coefficient is related to spectral acceleration of the landfill instead of peak ground acceleration. By this relation, the horizontal pseudostatic seismic coefficient is a function of geometry and material properties of the landfill which were not reflected in the proposed relations in the literature. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Iranian Journal of Science and Technology, Transactions of Civil Engineering" Springer Journals

Rational Selection of Pseudostatic Seismic Coefficient of Slopes

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References (34)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Shiraz University 2022
ISSN
2228-6160
eISSN
2364-1843
DOI
10.1007/s40996-022-00870-5
Publisher site
See Article on Publisher Site

Abstract

In this paper, the horizontal seismic coefficient of Nazloo landfill for quasi-static analysis is determined in two steps. In the first step, a probabilistic seismic hazard analysis is performed on the landfill site. For this purpose, active faults, historical and instrumental earthquakes within a specific radius of the site are identified and the final earthquake catalogue is determined after applying temporal–spatial windows. Then, the area under study is partitioned into multiple zones and the Gutenberg–Richter parameters for each zone are determined. Subsequently, the seismic characteristics of the faults and the attenuation equations are used to obtain the site design spectrum. The results are then used to produce a series of artificial seismic records in a way that their response spectra match the computed site design spectrum. In the second step, the resulting records are applied to the landfill and a Newmark type dynamic analysis is used to estimate the permanent displacement of the landfill. Pseudostatic seismic coefficient corresponds to a uniform ground acceleration over the effective earthquake duration which produces Newmark permanent displacement similar to that of the artificial earthquake. Therefore, the pseudostatic seismic coefficient is calculated by trial and error procedure. Finally, the computed horizontal pseudostatic seismic coefficient is related to spectral acceleration of the landfill instead of peak ground acceleration. By this relation, the horizontal pseudostatic seismic coefficient is a function of geometry and material properties of the landfill which were not reflected in the proposed relations in the literature.

Journal

"Iranian Journal of Science and Technology, Transactions of Civil Engineering" – Springer Journals

Published: Dec 1, 2022

Keywords: Probabilistic seismic hazard analysis; Newmark analysis; Artificial acceleration; Pseudostatic seismic coefficient

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