Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure Interaction
The seismic behavior of the anchor joint in shield-driven tunnel is very difficult to determine with the conventional methods due to the extensive simplifications. This paper proposed an improved approach to investigate the seismic response of the anchor joint, considering both the soil-structure-in...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/13/6362 |
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| author | Gaole Zhang Wenjun Zhang Jianbing Qi Rongjian Niu Chi Zhang |
| author_facet | Gaole Zhang Wenjun Zhang Jianbing Qi Rongjian Niu Chi Zhang |
| author_sort | Gaole Zhang |
| collection | DOAJ |
| description | The seismic behavior of the anchor joint in shield-driven tunnel is very difficult to determine with the conventional methods due to the extensive simplifications. This paper proposed an improved approach to investigate the seismic response of the anchor joint, considering both the soil-structure-interaction effect and the actual geometric features. Two three-dimensional numerical models were established, including the soil-tunnel system and the refined model of the anchor joint. A seismic analysis study was first conducted on the soil-tunnel model under different seismic input waves to obtain the responses of the joint opening and offset. Then, these results were imposed on the refined model of anchor joint to further examine its detailed performance under seismic excitations. The joint opening and offset under earthquake excitations from different directions were discussed. The distribution characteristics of the stress of the anchor joint were interpreted. Finally, safety evaluations on the anchor joint were executed based on the overall seismic responses. The results show that the maximum opening and offset of the anchor joint under the two-directional horizontal earthquake are greater than those under the unidirectional conditions, while different deformation trends are observed for the joints at distinct locations. The maximum opening of the anchor joint can reach 0.73 mm, whereas the peak offset is only 0.35 mm. The local plastic strain of the anchor joint increases under the seismic action, but all of the joints are still kept in the safe state under the most unfavorable conditions. The developed method in this paper can also be accessed by the seismic study on other types of joints with complex structural components in shield tunnels. |
| first_indexed | 2024-03-09T22:09:24Z |
| format | Article |
| id | doaj.art-6ebfadd294e9471a8e8b234a9d683e77 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T22:09:24Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-6ebfadd294e9471a8e8b234a9d683e772023-11-23T19:35:19ZengMDPI AGApplied Sciences2076-34172022-06-011213636210.3390/app12136362Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure InteractionGaole Zhang0Wenjun Zhang1Jianbing Qi2Rongjian Niu3Chi Zhang4School of Civil Engineering, Tianjin University, Tianjin 300350, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300350, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300350, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300350, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300350, ChinaThe seismic behavior of the anchor joint in shield-driven tunnel is very difficult to determine with the conventional methods due to the extensive simplifications. This paper proposed an improved approach to investigate the seismic response of the anchor joint, considering both the soil-structure-interaction effect and the actual geometric features. Two three-dimensional numerical models were established, including the soil-tunnel system and the refined model of the anchor joint. A seismic analysis study was first conducted on the soil-tunnel model under different seismic input waves to obtain the responses of the joint opening and offset. Then, these results were imposed on the refined model of anchor joint to further examine its detailed performance under seismic excitations. The joint opening and offset under earthquake excitations from different directions were discussed. The distribution characteristics of the stress of the anchor joint were interpreted. Finally, safety evaluations on the anchor joint were executed based on the overall seismic responses. The results show that the maximum opening and offset of the anchor joint under the two-directional horizontal earthquake are greater than those under the unidirectional conditions, while different deformation trends are observed for the joints at distinct locations. The maximum opening of the anchor joint can reach 0.73 mm, whereas the peak offset is only 0.35 mm. The local plastic strain of the anchor joint increases under the seismic action, but all of the joints are still kept in the safe state under the most unfavorable conditions. The developed method in this paper can also be accessed by the seismic study on other types of joints with complex structural components in shield tunnels.https://www.mdpi.com/2076-3417/12/13/6362shield tunnelanchor jointseismic responsenumerical analysissoil–structure interaction |
| spellingShingle | Gaole Zhang Wenjun Zhang Jianbing Qi Rongjian Niu Chi Zhang Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure Interaction Applied Sciences shield tunnel anchor joint seismic response numerical analysis soil–structure interaction |
| title | Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure Interaction |
| title_full | Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure Interaction |
| title_fullStr | Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure Interaction |
| title_full_unstemmed | Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure Interaction |
| title_short | Seismic Response Analysis of Anchor Joint in Shield–Driven Tunnel Considering Soil–Structure Interaction |
| title_sort | seismic response analysis of anchor joint in shield driven tunnel considering soil structure interaction |
| topic | shield tunnel anchor joint seismic response numerical analysis soil–structure interaction |
| url | https://www.mdpi.com/2076-3417/12/13/6362 |
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