Dynamic Responses Law of Subgrade of a Special Railway Line in Loess Region
In order to investigate the dynamic response law of subgrade of a special railway line in loess region under moving train loading, the field test data and 2.5D finite element results were adopted to assess the dynamic stress distribution and its influence depth, and the environmental vibration law i...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Shanghai Jiao Tong University
2022-07-01
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| Series: | Shanghai Jiaotong Daxue xuebao |
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| Online Access: | http://xuebao.sjtu.edu.cn/article/2022/1006-2467/1006-2467-56-7-908.shtml |
| _version_ | 1811321024041451520 |
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| author | WANG Rui, HU Zhiping, YIN Ke, MA Jiakuan, REN Xiang |
| author_facet | WANG Rui, HU Zhiping, YIN Ke, MA Jiakuan, REN Xiang |
| author_sort | WANG Rui, HU Zhiping, YIN Ke, MA Jiakuan, REN Xiang |
| collection | DOAJ |
| description | In order to investigate the dynamic response law of subgrade of a special railway line in loess region under moving train loading, the field test data and 2.5D finite element results were adopted to assess the dynamic stress distribution and its influence depth, and the environmental vibration law in the office area along the line was also analyzed. The results show that the excessive abstraction of the track system might enlarge the amplitude and influence the range of dynamic stress. The entity modeling of the ‘ballast-sleeper-fastener’ system makes the distribution of the dynamic stress in the subgrade more reasonable. The influence of energy consumption caused by the dynamic creep of soil have a negligible influence when the subgrade is in a quasi-static state. The speed has a negligible effect on the distribution of the dynamic stress of the subgrade when a freight train is running at a low speed, and the influence depth of the dynamic stress is about 4.2 m. As the speed decreases, the influence of track irregularity on the environmental vibration increases. The environmental vibration can be effectively controlled by improving the short wave length irregularity. |
| first_indexed | 2024-04-13T13:09:44Z |
| format | Article |
| id | doaj.art-940959b5491a4704ad75c04f55b15c58 |
| institution | Directory Open Access Journal |
| issn | 1006-2467 |
| language | zho |
| last_indexed | 2024-04-13T13:09:44Z |
| publishDate | 2022-07-01 |
| publisher | Editorial Office of Journal of Shanghai Jiao Tong University |
| record_format | Article |
| series | Shanghai Jiaotong Daxue xuebao |
| spelling | doaj.art-940959b5491a4704ad75c04f55b15c582022-12-22T02:45:38ZzhoEditorial Office of Journal of Shanghai Jiao Tong UniversityShanghai Jiaotong Daxue xuebao1006-24672022-07-0156790891810.16183/j.cnki.jsjtu.2021.130Dynamic Responses Law of Subgrade of a Special Railway Line in Loess RegionWANG Rui, HU Zhiping, YIN Ke, MA Jiakuan, REN Xiang01a. School of Civil Engineering;2b. Institute of Underground Structure and Engineering, Chang’an University, Xi’an 710061, ChinaIn order to investigate the dynamic response law of subgrade of a special railway line in loess region under moving train loading, the field test data and 2.5D finite element results were adopted to assess the dynamic stress distribution and its influence depth, and the environmental vibration law in the office area along the line was also analyzed. The results show that the excessive abstraction of the track system might enlarge the amplitude and influence the range of dynamic stress. The entity modeling of the ‘ballast-sleeper-fastener’ system makes the distribution of the dynamic stress in the subgrade more reasonable. The influence of energy consumption caused by the dynamic creep of soil have a negligible influence when the subgrade is in a quasi-static state. The speed has a negligible effect on the distribution of the dynamic stress of the subgrade when a freight train is running at a low speed, and the influence depth of the dynamic stress is about 4.2 m. As the speed decreases, the influence of track irregularity on the environmental vibration increases. The environmental vibration can be effectively controlled by improving the short wave length irregularity.http://xuebao.sjtu.edu.cn/article/2022/1006-2467/1006-2467-56-7-908.shtmltraffic loadingfield test2.5d finite element methodinfluence depthenvironmental vibrationirregularity |
| spellingShingle | WANG Rui, HU Zhiping, YIN Ke, MA Jiakuan, REN Xiang Dynamic Responses Law of Subgrade of a Special Railway Line in Loess Region Shanghai Jiaotong Daxue xuebao traffic loading field test 2.5d finite element method influence depth environmental vibration irregularity |
| title | Dynamic Responses Law of Subgrade of a Special Railway Line in Loess Region |
| title_full | Dynamic Responses Law of Subgrade of a Special Railway Line in Loess Region |
| title_fullStr | Dynamic Responses Law of Subgrade of a Special Railway Line in Loess Region |
| title_full_unstemmed | Dynamic Responses Law of Subgrade of a Special Railway Line in Loess Region |
| title_short | Dynamic Responses Law of Subgrade of a Special Railway Line in Loess Region |
| title_sort | dynamic responses law of subgrade of a special railway line in loess region |
| topic | traffic loading field test 2.5d finite element method influence depth environmental vibration irregularity |
| url | http://xuebao.sjtu.edu.cn/article/2022/1006-2467/1006-2467-56-7-908.shtml |
| work_keys_str_mv | AT wangruihuzhipingyinkemajiakuanrenxiang dynamicresponseslawofsubgradeofaspecialrailwaylineinloessregion |