Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation
Abstract This paper presents the ground motion amplification scenario along with fundamental frequency (F 0) of sedimentary deposit for the seismic microzonation of Kolkata City, situated on the world’s largest delta island with very soft soil deposit. A 4th order accurate SH-wave viscoelastic finit...
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Online Access: | http://dx.doi.org/10.2478/s11600-013-0169-2 |
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crdegruytopen:10.2478/s11600-013-0169-2 2023-05-15T16:00:31+02:00 Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation Shiuly, Amit Kumar, Vinay Narayan, Jay 2014 http://dx.doi.org/10.2478/s11600-013-0169-2 unknown Walter de Gruyter GmbH Acta Geophysica volume 62, issue 3 ISSN 1895-7455 Geophysics journal-article 2014 crdegruytopen https://doi.org/10.2478/s11600-013-0169-2 2017-05-04T06:25:58Z Abstract This paper presents the ground motion amplification scenario along with fundamental frequency (F 0) of sedimentary deposit for the seismic microzonation of Kolkata City, situated on the world’s largest delta island with very soft soil deposit. A 4th order accurate SH-wave viscoelastic finite-difference algorithm is used for computation of response of 1D model for each borehole location. Different maps, such as for F 0, amplification at F 0, average spectral amplification (ASA) in the different frequency bandwidth of earthquake engineering interest are developed for a variety of end-users communities. The obtained ASA of the order of 3–6 at most of the borehole locations in a frequency range of 0.25–10.0 Hz reveals that Kolkata City may suffer severe damage even during a moderate earthquake. Further, unexpected severe damage to collapse of multi-storey buildings may occur in localities near Hoogly River and Salt Lake area due to double resonance effects during distant large earthquakes. Article in Journal/Newspaper Delta Island Sciendo (de Gruyter - via CrossRef) Acta Geophysica 62 3 425 450 |
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Geophysics |
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Geophysics Shiuly, Amit Kumar, Vinay Narayan, Jay Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation |
topic_facet |
Geophysics |
description |
Abstract This paper presents the ground motion amplification scenario along with fundamental frequency (F 0) of sedimentary deposit for the seismic microzonation of Kolkata City, situated on the world’s largest delta island with very soft soil deposit. A 4th order accurate SH-wave viscoelastic finite-difference algorithm is used for computation of response of 1D model for each borehole location. Different maps, such as for F 0, amplification at F 0, average spectral amplification (ASA) in the different frequency bandwidth of earthquake engineering interest are developed for a variety of end-users communities. The obtained ASA of the order of 3–6 at most of the borehole locations in a frequency range of 0.25–10.0 Hz reveals that Kolkata City may suffer severe damage even during a moderate earthquake. Further, unexpected severe damage to collapse of multi-storey buildings may occur in localities near Hoogly River and Salt Lake area due to double resonance effects during distant large earthquakes. |
format |
Article in Journal/Newspaper |
author |
Shiuly, Amit Kumar, Vinay Narayan, Jay |
author_facet |
Shiuly, Amit Kumar, Vinay Narayan, Jay |
author_sort |
Shiuly, Amit |
title |
Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation |
title_short |
Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation |
title_full |
Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation |
title_fullStr |
Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation |
title_full_unstemmed |
Computation of ground motion amplification in Kolkata megacity (India) using finite-difference method for seismic microzonation |
title_sort |
computation of ground motion amplification in kolkata megacity (india) using finite-difference method for seismic microzonation |
publisher |
Walter de Gruyter GmbH |
publishDate |
2014 |
url |
http://dx.doi.org/10.2478/s11600-013-0169-2 |
genre |
Delta Island |
genre_facet |
Delta Island |
op_source |
Acta Geophysica volume 62, issue 3 ISSN 1895-7455 |
op_doi |
https://doi.org/10.2478/s11600-013-0169-2 |
container_title |
Acta Geophysica |
container_volume |
62 |
container_issue |
3 |
container_start_page |
425 |
op_container_end_page |
450 |
_version_ |
1766396501555150848 |