Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China Sea
Reef islands are valuable terrestrial resources for ocean exploitation and utilization but face the serious threat of earthquake disasters. This study takes Zhubi Reef in the South China Sea as the research object and establishes a three-dimensional (3D) reef-seawater model to investigate the seismi...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/2195304 |
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| _version_ | 1832560966606258176 |
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| author | Xin Bao Jingbo Liu Shutao Li Fei Wang |
| author_facet | Xin Bao Jingbo Liu Shutao Li Fei Wang |
| author_sort | Xin Bao |
| collection | DOAJ |
| description | Reef islands are valuable terrestrial resources for ocean exploitation and utilization but face the serious threat of earthquake disasters. This study takes Zhubi Reef in the South China Sea as the research object and establishes a three-dimensional (3D) reef-seawater model to investigate the seismic response of Zhubi Reef. The 3D local topography and the effect of fluid-solid interaction are comprehensively considered. The artificial boundaries of fluid and solid domains are adopted to simulate the wave radiation and absorption of the semi-infinite seabed and the infinite seawater layer. The boundary substructure method is used to input the seismic waves into the numerical reef models. The results indicate that the seismic responses, including the peak values of the ground motions and the acceleration response spectra, are significantly amplified over Zhubi Reef. The acceleration response spectra on the reef flat shift closer towards the low-period direction compared with those of the seismic waves input from the subsea bedrock. In addition, the 3D topographic effect on the seismic response of Zhubi Reef is studied through a comparative analysis between two-dimensional (2D) and 3D reef models. The distribution laws of the peak response in the middle region of the reef flat calculated by the 2D and 3D models agree well with each other, and the differences are obvious in the edge areas where the local 3D topographies change drastically. |
| format | Article |
| id | doaj-art-bb7948196abc4b5abe3379ae55f528b4 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-bb7948196abc4b5abe3379ae55f528b42025-02-03T01:26:23ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/21953042195304Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China SeaXin Bao0Jingbo Liu1Shutao Li2Fei Wang3Department of Civil Engineering, Tsinghua University, Beijing 10084, ChinaDepartment of Civil Engineering, Tsinghua University, Beijing 10084, ChinaDepartment of Civil Engineering, Tsinghua University, Beijing 10084, ChinaDepartment of Civil Engineering, Tsinghua University, Beijing 10084, ChinaReef islands are valuable terrestrial resources for ocean exploitation and utilization but face the serious threat of earthquake disasters. This study takes Zhubi Reef in the South China Sea as the research object and establishes a three-dimensional (3D) reef-seawater model to investigate the seismic response of Zhubi Reef. The 3D local topography and the effect of fluid-solid interaction are comprehensively considered. The artificial boundaries of fluid and solid domains are adopted to simulate the wave radiation and absorption of the semi-infinite seabed and the infinite seawater layer. The boundary substructure method is used to input the seismic waves into the numerical reef models. The results indicate that the seismic responses, including the peak values of the ground motions and the acceleration response spectra, are significantly amplified over Zhubi Reef. The acceleration response spectra on the reef flat shift closer towards the low-period direction compared with those of the seismic waves input from the subsea bedrock. In addition, the 3D topographic effect on the seismic response of Zhubi Reef is studied through a comparative analysis between two-dimensional (2D) and 3D reef models. The distribution laws of the peak response in the middle region of the reef flat calculated by the 2D and 3D models agree well with each other, and the differences are obvious in the edge areas where the local 3D topographies change drastically.http://dx.doi.org/10.1155/2021/2195304 |
| spellingShingle | Xin Bao Jingbo Liu Shutao Li Fei Wang Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China Sea Shock and Vibration |
| title | Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China Sea |
| title_full | Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China Sea |
| title_fullStr | Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China Sea |
| title_full_unstemmed | Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China Sea |
| title_short | Three-Dimensional Seismic Response Analysis of Zhubi Reef in the South China Sea |
| title_sort | three dimensional seismic response analysis of zhubi reef in the south china sea |
| url | http://dx.doi.org/10.1155/2021/2195304 |
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