Experimental and analytical study of seismic site response of discontinuous permafrost
Seismic site response of discontinuous permafrost is discussed. The presence of frozen ground in soil deposits can significantly affect their dynamic response due to stiffer conditions characterized by higher shear-wave velocities compared to unfrozen soils. Both experimental and numerical investiga...
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crcansciencepubl:10.1139/cgj-2015-0223 2023-12-17T10:48:34+01:00 Experimental and analytical study of seismic site response of discontinuous permafrost Dadfar, Behrang El Naggar, M. Hesham Nastev, Miroslav 2016 http://dx.doi.org/10.1139/cgj-2015-0223 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2015-0223 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2015-0223 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Geotechnical Journal volume 53, issue 9, page 1363-1375 ISSN 0008-3674 1208-6010 Civil and Structural Engineering Geotechnical Engineering and Engineering Geology journal-article 2016 crcansciencepubl https://doi.org/10.1139/cgj-2015-0223 2023-11-19T13:38:40Z Seismic site response of discontinuous permafrost is discussed. The presence of frozen ground in soil deposits can significantly affect their dynamic response due to stiffer conditions characterized by higher shear-wave velocities compared to unfrozen soils. Both experimental and numerical investigations were conducted to examine the problem. The experimental program included a series of 1g shaking table tests on small-scale models. Nonlinear numerical analyses were performed employing FLAC software. The numerical model was verified using the obtained experimental results. Parametric simulations were then conducted using the verified model to study variations of the free-field spectral accelerations (on top of the frozen and unfrozen soil blocks) with the scheme of frozen–unfrozen soil, and to determine the key parameters and their effects on seismic site response. Results show that spectral accelerations were generally higher in frozen soils than in unfrozen ones. It was found that the shear-wave velocity of the frozen soil as well as the assumed geometry of the blocks and their spacing have a significant impact on the site response. Article in Journal/Newspaper permafrost Canadian Science Publishing (via Crossref) Canadian Geotechnical Journal 53 9 1363 1375 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology |
spellingShingle |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology Dadfar, Behrang El Naggar, M. Hesham Nastev, Miroslav Experimental and analytical study of seismic site response of discontinuous permafrost |
topic_facet |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology |
description |
Seismic site response of discontinuous permafrost is discussed. The presence of frozen ground in soil deposits can significantly affect their dynamic response due to stiffer conditions characterized by higher shear-wave velocities compared to unfrozen soils. Both experimental and numerical investigations were conducted to examine the problem. The experimental program included a series of 1g shaking table tests on small-scale models. Nonlinear numerical analyses were performed employing FLAC software. The numerical model was verified using the obtained experimental results. Parametric simulations were then conducted using the verified model to study variations of the free-field spectral accelerations (on top of the frozen and unfrozen soil blocks) with the scheme of frozen–unfrozen soil, and to determine the key parameters and their effects on seismic site response. Results show that spectral accelerations were generally higher in frozen soils than in unfrozen ones. It was found that the shear-wave velocity of the frozen soil as well as the assumed geometry of the blocks and their spacing have a significant impact on the site response. |
format |
Article in Journal/Newspaper |
author |
Dadfar, Behrang El Naggar, M. Hesham Nastev, Miroslav |
author_facet |
Dadfar, Behrang El Naggar, M. Hesham Nastev, Miroslav |
author_sort |
Dadfar, Behrang |
title |
Experimental and analytical study of seismic site response of discontinuous permafrost |
title_short |
Experimental and analytical study of seismic site response of discontinuous permafrost |
title_full |
Experimental and analytical study of seismic site response of discontinuous permafrost |
title_fullStr |
Experimental and analytical study of seismic site response of discontinuous permafrost |
title_full_unstemmed |
Experimental and analytical study of seismic site response of discontinuous permafrost |
title_sort |
experimental and analytical study of seismic site response of discontinuous permafrost |
publisher |
Canadian Science Publishing |
publishDate |
2016 |
url |
http://dx.doi.org/10.1139/cgj-2015-0223 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2015-0223 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2015-0223 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Canadian Geotechnical Journal volume 53, issue 9, page 1363-1375 ISSN 0008-3674 1208-6010 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cgj-2015-0223 |
container_title |
Canadian Geotechnical Journal |
container_volume |
53 |
container_issue |
9 |
container_start_page |
1363 |
op_container_end_page |
1375 |
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1785572775041171456 |