A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element Method
Using a quasi-static method based on an axisymmetric finite element model for seismic response analysis of seismically isolated tunnels, the seismic isolation effect of the isolation layer is studied, and the seismic isolation mechanism of the isolation layer is clarified. The results show that, alo...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/6209409 |
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| _version_ | 1832559450719780864 |
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| author | Can Li Weizhong Chen Wusheng Zhao Takeyasu Suzuki Yoshihiro Shishikura |
| author_facet | Can Li Weizhong Chen Wusheng Zhao Takeyasu Suzuki Yoshihiro Shishikura |
| author_sort | Can Li |
| collection | DOAJ |
| description | Using a quasi-static method based on an axisymmetric finite element model for seismic response analysis of seismically isolated tunnels, the seismic isolation effect of the isolation layer is studied, and the seismic isolation mechanism of the isolation layer is clarified. The results show that, along the longitudinal direction of the tunnel, the seismic isolation effect is mainly affected by the shear modulus of the isolation material. The smaller the shear modulus is, the more evident the seismic isolation effect is. This is due to the tunnel being isolated from deformation of its peripheral ground through shear deformation of the isolation layer. However, along the transverse direction of the tunnel, the seismic isolation effect is mainly affected by the shear modulus and Poisson’s ratio of the isolation material. When Poisson’s ratio is close to 0.5, a seismic isolation effect is not evident because the tunnel cannot be isolated from deformation of its peripheral ground through compression deformation of the isolation layer. Finally, a seismic isolation system comprising a shield tunnel in which flexible segments are arranged at both ends of an isolation layer is proposed, and it is proved that the seismic isolation system has significant seismic isolation effects both on the longitudinal direction and on the transverse direction. |
| format | Article |
| id | doaj-art-d43244d014ae454b944675d4b9604b70 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-d43244d014ae454b944675d4b9604b702025-02-03T01:30:00ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/62094096209409A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element MethodCan Li0Weizhong Chen1Wusheng Zhao2Takeyasu Suzuki3Yoshihiro Shishikura4State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, ChinaGraduate School of Interdisciplinary Research, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, JapanGraduate School of Engineering, Civil and Environment Engineering Course, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, JapanUsing a quasi-static method based on an axisymmetric finite element model for seismic response analysis of seismically isolated tunnels, the seismic isolation effect of the isolation layer is studied, and the seismic isolation mechanism of the isolation layer is clarified. The results show that, along the longitudinal direction of the tunnel, the seismic isolation effect is mainly affected by the shear modulus of the isolation material. The smaller the shear modulus is, the more evident the seismic isolation effect is. This is due to the tunnel being isolated from deformation of its peripheral ground through shear deformation of the isolation layer. However, along the transverse direction of the tunnel, the seismic isolation effect is mainly affected by the shear modulus and Poisson’s ratio of the isolation material. When Poisson’s ratio is close to 0.5, a seismic isolation effect is not evident because the tunnel cannot be isolated from deformation of its peripheral ground through compression deformation of the isolation layer. Finally, a seismic isolation system comprising a shield tunnel in which flexible segments are arranged at both ends of an isolation layer is proposed, and it is proved that the seismic isolation system has significant seismic isolation effects both on the longitudinal direction and on the transverse direction.http://dx.doi.org/10.1155/2019/6209409 |
| spellingShingle | Can Li Weizhong Chen Wusheng Zhao Takeyasu Suzuki Yoshihiro Shishikura A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element Method Shock and Vibration |
| title | A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element Method |
| title_full | A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element Method |
| title_fullStr | A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element Method |
| title_full_unstemmed | A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element Method |
| title_short | A Study on Seismic Isolation of Shield Tunnel Using Quasi-Static Finite Element Method |
| title_sort | study on seismic isolation of shield tunnel using quasi static finite element method |
| url | http://dx.doi.org/10.1155/2019/6209409 |
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