Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads
The stress and deformation of pile-supported immersed tunnels under seismic loads is a critical issue in tunnel design. This paper utilizes ABAQUS (version 2020) finite element software to analyze the seismic load response of the sand compaction pile-immersed tunnel–seawater pressure (SIS) system, w...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-11-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/22/12092 |
| _version_ | 1827640819581976576 |
|---|---|
| author | Yan Zhuang Hu Fan Shunlei Hu Zhi Chen |
| author_facet | Yan Zhuang Hu Fan Shunlei Hu Zhi Chen |
| author_sort | Yan Zhuang |
| collection | DOAJ |
| description | The stress and deformation of pile-supported immersed tunnels under seismic loads is a critical issue in tunnel design. This paper utilizes ABAQUS (version 2020) finite element software to analyze the seismic load response of the sand compaction pile-immersed tunnel–seawater pressure (SIS) system, which is verified by a physical model. The study shows that the suppression effect of the seawater on the vertical frequency of the tunnel increases with depth. When the replacement rate of the piled foundation reaches 50%, the deformation of the tunnel “H-shaped” structures increases, which also changes the vertical frequency of the tunnel. However, the presence of the suppression effect causes resonance injury at the far end of the tunnel from the earthquake source, resulting in a shift of the peak stress point. It was also found that seawater pressure affects the resistance–deflection (<i>p-y</i>) at the tip of the pile more than at the end of the pile. The slenderness ratio (<i>γ</i>) of the pile affects the <i>p-y</i> value at the end of the pile more than at the tip of the pile. The connection between the piled foundation and the tunnel is most stable when <i>γ</i> is in the range of 9.25 to 15. |
| first_indexed | 2024-03-09T17:04:54Z |
| format | Article |
| id | doaj.art-cd7617eeca4e4cf79e143300791e6bc3 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T17:04:54Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-cd7617eeca4e4cf79e143300791e6bc32023-11-24T14:26:09ZengMDPI AGApplied Sciences2076-34172023-11-0113221209210.3390/app132212092Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic LoadsYan Zhuang0Hu Fan1Shunlei Hu2Zhi Chen3School of Civil, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaKey Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, Nanjing 210096, ChinaSchool of Civil, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaThe stress and deformation of pile-supported immersed tunnels under seismic loads is a critical issue in tunnel design. This paper utilizes ABAQUS (version 2020) finite element software to analyze the seismic load response of the sand compaction pile-immersed tunnel–seawater pressure (SIS) system, which is verified by a physical model. The study shows that the suppression effect of the seawater on the vertical frequency of the tunnel increases with depth. When the replacement rate of the piled foundation reaches 50%, the deformation of the tunnel “H-shaped” structures increases, which also changes the vertical frequency of the tunnel. However, the presence of the suppression effect causes resonance injury at the far end of the tunnel from the earthquake source, resulting in a shift of the peak stress point. It was also found that seawater pressure affects the resistance–deflection (<i>p-y</i>) at the tip of the pile more than at the end of the pile. The slenderness ratio (<i>γ</i>) of the pile affects the <i>p-y</i> value at the end of the pile more than at the tip of the pile. The connection between the piled foundation and the tunnel is most stable when <i>γ</i> is in the range of 9.25 to 15.https://www.mdpi.com/2076-3417/13/22/12092sand compaction pileimmersed tunnelfrequencyslenderness ratioreplacement ratestress and deformation |
| spellingShingle | Yan Zhuang Hu Fan Shunlei Hu Zhi Chen Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads Applied Sciences sand compaction pile immersed tunnel frequency slenderness ratio replacement rate stress and deformation |
| title | Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads |
| title_full | Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads |
| title_fullStr | Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads |
| title_full_unstemmed | Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads |
| title_short | Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads |
| title_sort | deformation and stress analysis of pile supported immersed tunnels under seismic loads |
| topic | sand compaction pile immersed tunnel frequency slenderness ratio replacement rate stress and deformation |
| url | https://www.mdpi.com/2076-3417/13/22/12092 |
| work_keys_str_mv | AT yanzhuang deformationandstressanalysisofpilesupportedimmersedtunnelsunderseismicloads AT hufan deformationandstressanalysisofpilesupportedimmersedtunnelsunderseismicloads AT shunleihu deformationandstressanalysisofpilesupportedimmersedtunnelsunderseismicloads AT zhichen deformationandstressanalysisofpilesupportedimmersedtunnelsunderseismicloads |