Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base Cavity
The presence of a base cavity will degrade the bearing capacity of tunnel bottom structures, and will also have a noteworthy impact on its fatigue performance. In order to study the fatigue performance and cumulative damage to tunnel bottom structure, a series of bending fatigue tests are conducted...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-04-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.870710/full |
| _version_ | 1818278811901362176 |
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| author | Cong Liu Cong Liu Bo Wu Rui Li Feng Wang Qianlong Tang |
| author_facet | Cong Liu Cong Liu Bo Wu Rui Li Feng Wang Qianlong Tang |
| author_sort | Cong Liu |
| collection | DOAJ |
| description | The presence of a base cavity will degrade the bearing capacity of tunnel bottom structures, and will also have a noteworthy impact on its fatigue performance. In order to study the fatigue performance and cumulative damage to tunnel bottom structure, a series of bending fatigue tests are conducted by reference to a heavy haul railway tunnel with a base cavity. Through the tests, fatigue evolution characteristics of tunnel bottom structure with cavity are obtained, then based on the expression of S-N curves, a non-linear fatigue cumulative damage model is therefore proposed, the deflection evolution and cumulative damage evolution can be divided into three stages, and characterized with an “s-shaped” curve. The tests results reveal that the damage to the tunnel bottom structure develops rapidly when a cavity exists in the base rock, fatigue occurs more easily, and the fatigue life of specimens decreases with the increase of the stress level and cavity width. |
| first_indexed | 2024-12-12T23:23:22Z |
| format | Article |
| id | doaj.art-cf98950185854f85808d38f8ec622191 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-12T23:23:22Z |
| publishDate | 2022-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-cf98950185854f85808d38f8ec6221912022-12-22T00:08:13ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-04-011010.3389/feart.2022.870710870710Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base CavityCong Liu0Cong Liu1Bo Wu2Rui Li3Feng Wang4Qianlong Tang5School of Civil and Architectural Engineering, East China University of Technology, Nanchang, ChinaGeological Survey of Jiangxi Province, Nanchang, ChinaSchool of Civil and Architectural Engineering, East China University of Technology, Nanchang, ChinaShuohuang Railway Development Co. Ltd., Beijing, ChinaShuohuang Railway Development Co. Ltd., Beijing, ChinaJiangxi Transportation Vocational and Technical College, Nanchang, ChinaThe presence of a base cavity will degrade the bearing capacity of tunnel bottom structures, and will also have a noteworthy impact on its fatigue performance. In order to study the fatigue performance and cumulative damage to tunnel bottom structure, a series of bending fatigue tests are conducted by reference to a heavy haul railway tunnel with a base cavity. Through the tests, fatigue evolution characteristics of tunnel bottom structure with cavity are obtained, then based on the expression of S-N curves, a non-linear fatigue cumulative damage model is therefore proposed, the deflection evolution and cumulative damage evolution can be divided into three stages, and characterized with an “s-shaped” curve. The tests results reveal that the damage to the tunnel bottom structure develops rapidly when a cavity exists in the base rock, fatigue occurs more easily, and the fatigue life of specimens decreases with the increase of the stress level and cavity width.https://www.frontiersin.org/articles/10.3389/feart.2022.870710/fulltunnelbottom structurebase cavityfatiguedamage |
| spellingShingle | Cong Liu Cong Liu Bo Wu Rui Li Feng Wang Qianlong Tang Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base Cavity Frontiers in Earth Science tunnel bottom structure base cavity fatigue damage |
| title | Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base Cavity |
| title_full | Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base Cavity |
| title_fullStr | Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base Cavity |
| title_full_unstemmed | Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base Cavity |
| title_short | Fatigue Test on Heavy Haul Railway Tunnel Bottom Structure With Base Cavity |
| title_sort | fatigue test on heavy haul railway tunnel bottom structure with base cavity |
| topic | tunnel bottom structure base cavity fatigue damage |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.870710/full |
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