Experimental and Numerical Research on Defective Shield Segment under Cyclic Loading
The retaining structure of a shield tunnel is usually subjected to static loading; however, cyclic loading such as the vibration loading of the train will act on the lining structure year after year that cannot be neglected. Due to the complex manufacturing and assembling process of the lining segme...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/8567899 |
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| _version_ | 1832566309656723456 |
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| author | Long-gang Tian Zhi-qiang Hu Jie Chen |
| author_facet | Long-gang Tian Zhi-qiang Hu Jie Chen |
| author_sort | Long-gang Tian |
| collection | DOAJ |
| description | The retaining structure of a shield tunnel is usually subjected to static loading; however, cyclic loading such as the vibration loading of the train will act on the lining structure year after year that cannot be neglected. Due to the complex manufacturing and assembling process of the lining segment, initial defects in the segment are inevitable. Such defects will propagate under the cyclic loading such as the train vibration, which may cause a large threat to the shield tunnel system. In this paper, a defective shield tunnel lining segment under cyclic loading is studied by both a full-scale experiment and three-dimensional numerical simulations to investigate its fracture properties and failure mechanism and make a rational estimate of its fatigue life. Results show that crack propagation of the defective shield tunnel segment can be identified as several different stages based on its deformation characteristics, and the failure pattern of the segment is determined by its initial defects. The results by the experiment and numerical investigation are in good agreement for each other. |
| format | Article |
| id | doaj-art-ed0b09bff39a40f8b8b3b59da833a54b |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-ed0b09bff39a40f8b8b3b59da833a54b2025-02-03T01:04:35ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/85678998567899Experimental and Numerical Research on Defective Shield Segment under Cyclic LoadingLong-gang Tian0Zhi-qiang Hu1Jie Chen2School of Civil Engineering, Southeast University, Nanjing 211189, ChinaSchool of Civil Engineering, Southeast University, Nanjing 211189, ChinaKey Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, CEA, Harbin 150080, ChinaThe retaining structure of a shield tunnel is usually subjected to static loading; however, cyclic loading such as the vibration loading of the train will act on the lining structure year after year that cannot be neglected. Due to the complex manufacturing and assembling process of the lining segment, initial defects in the segment are inevitable. Such defects will propagate under the cyclic loading such as the train vibration, which may cause a large threat to the shield tunnel system. In this paper, a defective shield tunnel lining segment under cyclic loading is studied by both a full-scale experiment and three-dimensional numerical simulations to investigate its fracture properties and failure mechanism and make a rational estimate of its fatigue life. Results show that crack propagation of the defective shield tunnel segment can be identified as several different stages based on its deformation characteristics, and the failure pattern of the segment is determined by its initial defects. The results by the experiment and numerical investigation are in good agreement for each other.http://dx.doi.org/10.1155/2021/8567899 |
| spellingShingle | Long-gang Tian Zhi-qiang Hu Jie Chen Experimental and Numerical Research on Defective Shield Segment under Cyclic Loading Shock and Vibration |
| title | Experimental and Numerical Research on Defective Shield Segment under Cyclic Loading |
| title_full | Experimental and Numerical Research on Defective Shield Segment under Cyclic Loading |
| title_fullStr | Experimental and Numerical Research on Defective Shield Segment under Cyclic Loading |
| title_full_unstemmed | Experimental and Numerical Research on Defective Shield Segment under Cyclic Loading |
| title_short | Experimental and Numerical Research on Defective Shield Segment under Cyclic Loading |
| title_sort | experimental and numerical research on defective shield segment under cyclic loading |
| url | http://dx.doi.org/10.1155/2021/8567899 |
| work_keys_str_mv | AT longgangtian experimentalandnumericalresearchondefectiveshieldsegmentundercyclicloading AT zhiqianghu experimentalandnumericalresearchondefectiveshieldsegmentundercyclicloading AT jiechen experimentalandnumericalresearchondefectiveshieldsegmentundercyclicloading |