Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV Waves
The topography and the incident angle of seismic waves both have considerable effects on the seismic ground motions of canyons in a half-space. In this paper, the theory of wavefield decomposition and the artificial boundary is used to develop a method for inputting obliquely incident SV waves. Form...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2023/3384829 |
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| _version_ | 1832547348231749632 |
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| author | Hui Shen Yaqun Liu Haibo Li Bo Liu |
| author_facet | Hui Shen Yaqun Liu Haibo Li Bo Liu |
| author_sort | Hui Shen |
| collection | DOAJ |
| description | The topography and the incident angle of seismic waves both have considerable effects on the seismic ground motions of canyons in a half-space. In this paper, the theory of wavefield decomposition and the artificial boundary is used to develop a method for inputting obliquely incident SV waves. Formulas for the equivalent nodal forces applied to the truncated boundary are derived and implemented in the finite element method. The validity of the proposed method is verified by a test case. A parametric study is then performed to investigate the influence of canyon geometry and incident angle of SV waves on the seismic response of trapezoidal canyons. The numerical results indicate that the canyon inclination has a more significant effect on the ground motion amplification than its height and width. The amplification effects are strongly related to the canyon inclination and the incident angle of SV waves. Additionally, the dominant frequency corresponding to the acceleration of the canyon crests is not sensitive to the incident angle of SV waves. |
| format | Article |
| id | doaj-art-3ad22b2b04b44b10ad6af6d5ade36c24 |
| institution | Kabale University |
| issn | 1875-9203 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-3ad22b2b04b44b10ad6af6d5ade36c242025-02-03T06:45:15ZengWileyShock and Vibration1875-92032023-01-01202310.1155/2023/3384829Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV WavesHui Shen0Yaqun Liu1Haibo Li2Bo Liu3Institute of Rock and Soil MechanicsInstitute of Rock and Soil MechanicsInstitute of Rock and Soil MechanicsInstitute of Rock and Soil MechanicsThe topography and the incident angle of seismic waves both have considerable effects on the seismic ground motions of canyons in a half-space. In this paper, the theory of wavefield decomposition and the artificial boundary is used to develop a method for inputting obliquely incident SV waves. Formulas for the equivalent nodal forces applied to the truncated boundary are derived and implemented in the finite element method. The validity of the proposed method is verified by a test case. A parametric study is then performed to investigate the influence of canyon geometry and incident angle of SV waves on the seismic response of trapezoidal canyons. The numerical results indicate that the canyon inclination has a more significant effect on the ground motion amplification than its height and width. The amplification effects are strongly related to the canyon inclination and the incident angle of SV waves. Additionally, the dominant frequency corresponding to the acceleration of the canyon crests is not sensitive to the incident angle of SV waves.http://dx.doi.org/10.1155/2023/3384829 |
| spellingShingle | Hui Shen Yaqun Liu Haibo Li Bo Liu Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV Waves Shock and Vibration |
| title | Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV Waves |
| title_full | Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV Waves |
| title_fullStr | Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV Waves |
| title_full_unstemmed | Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV Waves |
| title_short | Topographic Effects on the Seismic Response of Trapezoidal Canyons Subjected to Obliquely Incident SV Waves |
| title_sort | topographic effects on the seismic response of trapezoidal canyons subjected to obliquely incident sv waves |
| url | http://dx.doi.org/10.1155/2023/3384829 |
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