Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay
Sea ice disasters seriously threaten the structural safety of oil platforms in the Bohai Sea. Therefore, it is necessary to carry out a risk assessment of sea ice disasters on oil platforms in the Bohai Sea. In this study, a risk assessment of sea ice disasters on fixed jacket platforms in Liaodong...
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Copernicus Publications
2020
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00051357 2023-05-15T18:16:12+02:00 Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay Xu, Ning Yuan, Shuai Liu, Xueqin Ma, Yuxian Shi, Wenqi Zhang, Dayong 2020-04 electronic https://doi.org/10.5194/nhess-20-1107-2020 https://noa.gwlb.de/receive/cop_mods_00051357 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051013/nhess-20-1107-2020.pdf https://nhess.copernicus.org/articles/20/1107/2020/nhess-20-1107-2020.pdf eng eng Copernicus Publications Natural Hazards and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2064587 -- http://www.nat-hazards-earth-syst-sci.net/ -- 1684-9981 https://doi.org/10.5194/nhess-20-1107-2020 https://noa.gwlb.de/receive/cop_mods_00051357 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051013/nhess-20-1107-2020.pdf https://nhess.copernicus.org/articles/20/1107/2020/nhess-20-1107-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/nhess-20-1107-2020 2022-02-08T22:36:26Z Sea ice disasters seriously threaten the structural safety of oil platforms in the Bohai Sea. Therefore, it is necessary to carry out a risk assessment of sea ice disasters on oil platforms in the Bohai Sea. In this study, a risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay, in the Bohai Sea, was performed in five steps. Firstly, the formation mechanisms of sea ice disasters were analyzed and the sources and modes of sea ice risks were summarized. Secondly, according to the calculation formulas of extreme ice force, dynamic ice force, and accumulated force, several ice indices such as thickness, motion, strength, period, and concentration were proposed as the hazard indices, and corresponding values were then assigned to the proposed indices based on ice conditions in the Bohai Sea. Thirdly, based on four structural failure modes – structural overturning by extreme ice force (Mode 1), structural fracture failure caused by dynamic ice force (Mode 2), the damage of facilities caused by dynamic ice force (Mode 3), and structural function failure caused by accumulated ice (Mode 4) – the structural vulnerability index, overturning index, dynamic index, ice-induced vibration index, and function index were proposed, and corresponding values were assigned to the structural vulnerability index of fixed jacket platforms in Liaodong Bay. Fourthly, the weight of each risk index was determined according to previously recorded sea ice disasters and accidents, and the sea ice risk was then calculated with the weighted synthetic index method. Finally, with the above index system and risk assessment methods, the risk assessment of sea ice disasters on 10 jacket platforms in three sea areas in Liaodong Bay was carried out. The analysis results showed that efficient sea ice prevention strategies could largely mitigate the sea ice-induced vibration-related risks of jacket platforms in Liaodong Bay. If steady-state vibration occurs (usually in front of the vertical legged structure) or the structural fundamental frequency is high, the structural vulnerability is significantly increased and the calculated risk levels are high. The sea ice risk assessment method can be applied in the design, operation, and management of other engineering structures in sea ice areas. Article in Journal/Newspaper Sea ice Niedersächsisches Online-Archiv NOA Natural Hazards and Earth System Sciences 20 4 1107 1121 |
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article Verlagsveröffentlichung Xu, Ning Yuan, Shuai Liu, Xueqin Ma, Yuxian Shi, Wenqi Zhang, Dayong Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay |
topic_facet |
article Verlagsveröffentlichung |
description |
Sea ice disasters seriously threaten the structural safety of oil platforms in the Bohai Sea. Therefore, it is necessary to carry out a risk assessment of sea ice disasters on oil platforms in the Bohai Sea. In this study, a risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay, in the Bohai Sea, was performed in five steps. Firstly, the formation mechanisms of sea ice disasters were analyzed and the sources and modes of sea ice risks were summarized. Secondly, according to the calculation formulas of extreme ice force, dynamic ice force, and accumulated force, several ice indices such as thickness, motion, strength, period, and concentration were proposed as the hazard indices, and corresponding values were then assigned to the proposed indices based on ice conditions in the Bohai Sea. Thirdly, based on four structural failure modes – structural overturning by extreme ice force (Mode 1), structural fracture failure caused by dynamic ice force (Mode 2), the damage of facilities caused by dynamic ice force (Mode 3), and structural function failure caused by accumulated ice (Mode 4) – the structural vulnerability index, overturning index, dynamic index, ice-induced vibration index, and function index were proposed, and corresponding values were assigned to the structural vulnerability index of fixed jacket platforms in Liaodong Bay. Fourthly, the weight of each risk index was determined according to previously recorded sea ice disasters and accidents, and the sea ice risk was then calculated with the weighted synthetic index method. Finally, with the above index system and risk assessment methods, the risk assessment of sea ice disasters on 10 jacket platforms in three sea areas in Liaodong Bay was carried out. The analysis results showed that efficient sea ice prevention strategies could largely mitigate the sea ice-induced vibration-related risks of jacket platforms in Liaodong Bay. If steady-state vibration occurs (usually in front of the vertical legged structure) or the structural fundamental frequency is high, the structural vulnerability is significantly increased and the calculated risk levels are high. The sea ice risk assessment method can be applied in the design, operation, and management of other engineering structures in sea ice areas. |
format |
Article in Journal/Newspaper |
author |
Xu, Ning Yuan, Shuai Liu, Xueqin Ma, Yuxian Shi, Wenqi Zhang, Dayong |
author_facet |
Xu, Ning Yuan, Shuai Liu, Xueqin Ma, Yuxian Shi, Wenqi Zhang, Dayong |
author_sort |
Xu, Ning |
title |
Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay |
title_short |
Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay |
title_full |
Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay |
title_fullStr |
Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay |
title_full_unstemmed |
Risk assessment of sea ice disasters on fixed jacket platforms in Liaodong Bay |
title_sort |
risk assessment of sea ice disasters on fixed jacket platforms in liaodong bay |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/nhess-20-1107-2020 https://noa.gwlb.de/receive/cop_mods_00051357 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051013/nhess-20-1107-2020.pdf https://nhess.copernicus.org/articles/20/1107/2020/nhess-20-1107-2020.pdf |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Natural Hazards and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2064587 -- http://www.nat-hazards-earth-syst-sci.net/ -- 1684-9981 https://doi.org/10.5194/nhess-20-1107-2020 https://noa.gwlb.de/receive/cop_mods_00051357 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051013/nhess-20-1107-2020.pdf https://nhess.copernicus.org/articles/20/1107/2020/nhess-20-1107-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/nhess-20-1107-2020 |
container_title |
Natural Hazards and Earth System Sciences |
container_volume |
20 |
container_issue |
4 |
container_start_page |
1107 |
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1121 |
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1766189655450976256 |