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Seismic site classification and amplification of shallow bedrock sites

This study attempts to develop empirical correlations between average penetration resistance ([Image: see text] ), averaged velocities over depth up to bedrock depth ([Image: see text] ) and 30 m ([Image: see text] ) for shallow depth sites (having bedrock at a depth less than 25 m). A total of 63 s...

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Autores principales: Panjamani, Anbazhagan, Kumar Katukuri, Arun, G.R, Reddy, Moustafa, Sayed S. R., Al-Arifi, Nassir S. N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6306271/
https://www.ncbi.nlm.nih.gov/pubmed/30586671
http://dx.doi.org/10.1371/journal.pone.0208226
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author Panjamani, Anbazhagan
Kumar Katukuri, Arun
G.R, Reddy
Moustafa, Sayed S. R.
Al-Arifi, Nassir S. N.
author_facet Panjamani, Anbazhagan
Kumar Katukuri, Arun
G.R, Reddy
Moustafa, Sayed S. R.
Al-Arifi, Nassir S. N.
author_sort Panjamani, Anbazhagan
collection PubMed
description This study attempts to develop empirical correlations between average penetration resistance ([Image: see text] ), averaged velocities over depth up to bedrock depth ([Image: see text] ) and 30 m ([Image: see text] ) for shallow depth sites (having bedrock at a depth less than 25 m). A total of 63 shallow sites were assessed for penetration resistance values up to the bedrock from Standard Penetration Tests (SPT) and dynamic soil property analysis, i.e., Shear Wave Velocity (V(S)) from Multichannel Analysis of Surface Waves. The study shows that 30 m averaged shear wave velocities are more than the average velocity up to bedrock depth in shallow bedrock sites because of inclusion of rock site velocity. Furthermore, averaged SPT-N([Image: see text] ) and average V(S) ([Image: see text] ) up to bedrock depth were correlated with the 30 m average([Image: see text] ) values. This is the first attempt in developing empirical relationships of this kind for seismic site classification. These correlations can be made useful for seismic site classification of sites in regions with Standard Penetration Test (N(SPT)) values and limited V(S) values. Further surface and bedrock motion recordings of 12 selected KiK-net shallow depth sites were collected and amplifications were estimated with the respective peak ground acceleration, spectral acceleration and thereby related to the average shear wave velocity up to bedrock and 30 m. The results show that the amplification is better correlated to the [Image: see text] than [Image: see text] for shallow depth sites, and more data can be added to strengthen this correlation.
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spelling pubmed-63062712019-01-08 Seismic site classification and amplification of shallow bedrock sites Panjamani, Anbazhagan Kumar Katukuri, Arun G.R, Reddy Moustafa, Sayed S. R. Al-Arifi, Nassir S. N. PLoS One Research Article This study attempts to develop empirical correlations between average penetration resistance ([Image: see text] ), averaged velocities over depth up to bedrock depth ([Image: see text] ) and 30 m ([Image: see text] ) for shallow depth sites (having bedrock at a depth less than 25 m). A total of 63 shallow sites were assessed for penetration resistance values up to the bedrock from Standard Penetration Tests (SPT) and dynamic soil property analysis, i.e., Shear Wave Velocity (V(S)) from Multichannel Analysis of Surface Waves. The study shows that 30 m averaged shear wave velocities are more than the average velocity up to bedrock depth in shallow bedrock sites because of inclusion of rock site velocity. Furthermore, averaged SPT-N([Image: see text] ) and average V(S) ([Image: see text] ) up to bedrock depth were correlated with the 30 m average([Image: see text] ) values. This is the first attempt in developing empirical relationships of this kind for seismic site classification. These correlations can be made useful for seismic site classification of sites in regions with Standard Penetration Test (N(SPT)) values and limited V(S) values. Further surface and bedrock motion recordings of 12 selected KiK-net shallow depth sites were collected and amplifications were estimated with the respective peak ground acceleration, spectral acceleration and thereby related to the average shear wave velocity up to bedrock and 30 m. The results show that the amplification is better correlated to the [Image: see text] than [Image: see text] for shallow depth sites, and more data can be added to strengthen this correlation. Public Library of Science 2018-12-26 /pmc/articles/PMC6306271/ /pubmed/30586671 http://dx.doi.org/10.1371/journal.pone.0208226 Text en © 2018 Panjamani et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Panjamani, Anbazhagan
Kumar Katukuri, Arun
G.R, Reddy
Moustafa, Sayed S. R.
Al-Arifi, Nassir S. N.
Seismic site classification and amplification of shallow bedrock sites
title Seismic site classification and amplification of shallow bedrock sites
title_full Seismic site classification and amplification of shallow bedrock sites
title_fullStr Seismic site classification and amplification of shallow bedrock sites
title_full_unstemmed Seismic site classification and amplification of shallow bedrock sites
title_short Seismic site classification and amplification of shallow bedrock sites
title_sort seismic site classification and amplification of shallow bedrock sites
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6306271/
https://www.ncbi.nlm.nih.gov/pubmed/30586671
http://dx.doi.org/10.1371/journal.pone.0208226
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