Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal Excitations
Input of sinusoidal excitation with specified frequency is an optimal way to capture the mechanism of soil-tunnel interaction. Focusing on the relationship between the frequency of input sinusoidal motions and the dynamic response of a system, this study carried out a series of shaking table tests o...
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| Format: | Article |
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MDPI AG
2021-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/11/5097 |
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| author | Shaohua Zhang Yong Yuan Yusheng Yang Chong Li Herbert A. Mang |
| author_facet | Shaohua Zhang Yong Yuan Yusheng Yang Chong Li Herbert A. Mang |
| author_sort | Shaohua Zhang |
| collection | DOAJ |
| description | Input of sinusoidal excitation with specified frequency is an optimal way to capture the mechanism of soil-tunnel interaction. Focusing on the relationship between the frequency of input sinusoidal motions and the dynamic response of a system, this study carried out a series of shaking table tests on both a free-field model and soil–tunnel model in the background of the tunnel in soft ground. To detect the detailed deformation of segmental linings, a refined lining ring of the model tunnel was developed, and the stiffness ratio between the soil and tunnel was verified. Seven sinusoidal excitations were designated to cover the fundamental frequency of the model ground, with the input of transverse direction. Effects of frequency of sinusoidal excitations on soil-tunnel interaction can be evaluated by the detailed responses of segmental linings, such as cross-sectional deformations, extension/closure of longitudinal joints, dynamic normal earth pressures, and dynamic strains of segments. Results shows that the differences of the acceleration responses, on the respects of waveform, phase, and peak, between the upper soil layer and the lower soil layer are obviously increasing with the input frequency increasing. The presence of the tunnel induces a relatively high effect on acceleration responses of the ground within excitation frequency varying from 9 to 17 Hz. The maximum responses of the tunnel are highly influenced by both the fundamental frequency of the model ground and lower frequency of excitations. |
| first_indexed | 2024-03-10T10:51:50Z |
| format | Article |
| id | doaj.art-96e820048058475c8f4fc58bbf03b5a5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:51:50Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-96e820048058475c8f4fc58bbf03b5a52023-11-21T22:12:00ZengMDPI AGApplied Sciences2076-34172021-05-011111509710.3390/app11115097Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal ExcitationsShaohua Zhang0Yong Yuan1Yusheng Yang2Chong Li3Herbert A. Mang4Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaInput of sinusoidal excitation with specified frequency is an optimal way to capture the mechanism of soil-tunnel interaction. Focusing on the relationship between the frequency of input sinusoidal motions and the dynamic response of a system, this study carried out a series of shaking table tests on both a free-field model and soil–tunnel model in the background of the tunnel in soft ground. To detect the detailed deformation of segmental linings, a refined lining ring of the model tunnel was developed, and the stiffness ratio between the soil and tunnel was verified. Seven sinusoidal excitations were designated to cover the fundamental frequency of the model ground, with the input of transverse direction. Effects of frequency of sinusoidal excitations on soil-tunnel interaction can be evaluated by the detailed responses of segmental linings, such as cross-sectional deformations, extension/closure of longitudinal joints, dynamic normal earth pressures, and dynamic strains of segments. Results shows that the differences of the acceleration responses, on the respects of waveform, phase, and peak, between the upper soil layer and the lower soil layer are obviously increasing with the input frequency increasing. The presence of the tunnel induces a relatively high effect on acceleration responses of the ground within excitation frequency varying from 9 to 17 Hz. The maximum responses of the tunnel are highly influenced by both the fundamental frequency of the model ground and lower frequency of excitations.https://www.mdpi.com/2076-3417/11/11/5097shaking table testrefined lining ringsinusoidal excitationsoil–tunnel interactiondetailed deformation |
| spellingShingle | Shaohua Zhang Yong Yuan Yusheng Yang Chong Li Herbert A. Mang Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal Excitations Applied Sciences shaking table test refined lining ring sinusoidal excitation soil–tunnel interaction detailed deformation |
| title | Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal Excitations |
| title_full | Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal Excitations |
| title_fullStr | Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal Excitations |
| title_full_unstemmed | Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal Excitations |
| title_short | Dynamic Performance of Soil–Tunnel System under Transverse Sinusoidal Excitations |
| title_sort | dynamic performance of soil tunnel system under transverse sinusoidal excitations |
| topic | shaking table test refined lining ring sinusoidal excitation soil–tunnel interaction detailed deformation |
| url | https://www.mdpi.com/2076-3417/11/11/5097 |
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