Research on Co-Seismic Displacement of Ground Surface at Liuhuanggou Bridge of Lanzhou-Xinjiang High-Speed Railway Caused by the 2022 Menyuan Earthquake in Qinghai Province

被引：0

作者：

Liu Y. ^{[1
,2
]}

Ren Y. ^{[1
,2
]}

Wang D. ^{[1
,2
]}

Wen R. ^{[1
,2
]}

Huang Y. ^{[1
,2
]}

Wang H. ^{[1
,2
]}

机构：

[1] Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin

[2] Key Laboratory of Earthquake Disaster Mitigation, Ministry of Emergency Management, Harbin

来源：

Zhongguo Tiedao Kexue/China Railway Science | 2022年 / 43卷 / 05期

关键词：

Co-seismic displacement; Lanzhou-Xinjiang high-speed railway; Liuhuanggou Bridge; Menyuan earthquake; Okada dislocation theory; Slip model;

D O I：

10.3969/j.issn.1001-4632.2022.05.05

中图分类号：

学科分类号：

摘要：

Based on the Okada dislocation theory of elastic half-space, four types of fault slip models obtained from the inversion using various data or methods were used to research on the co-seismic displacement of ground surface along the Lanzhou-Xinjiang high-speed railway and at the Liuhuanggou Bridge caused by the Mw6.6 earthquake in Menyuan County, Qinghai Province, in 2022. The results show that: the southern side (the hanging wall) of the seismogenic fault moves eastward in an ensemble, while the northern side (the foot wall) moves westward, indicating an obvious strike-slip mechanism. For the co-seismic displacement for the entire disaster area, the maximum dislocation of ground surface calculated by the China Earthquake Network (CEN) model is about 3.0 m, which is closest to the field survey result of 3.1 m. However, for the co-seismic displacement of ground surfare along the Liuhuanggou Bridge of Lanzhou-Xinjiang high-speed railway, there is no significant dislocation at this location indicated by the calculation of the United States Geological Survey model and the Institute of Tibetan Plateau Research, Chinese Academy of Sciences (ITPCAS) model. The calculation results using the CEN model and the Chang'an University model show that, Liuhuanggou Bridge is located at the interface between the hanging wall and the foot wall of seismogenic fault, but the maximum dislocation of ground surface and its location are quite different. The most large-scale dislocation is about 2.54 m obtained by the former model, located in the Daliang tunnel to the south of the Liuhuanggou Bridge, while that obtained by the latter model is 1.49 m, located at the piers in the south of the Bridge, which is consistent to the location of the most large-scale deformation of the bridge deck after earthquake. © 2022, Editorial Department of China Railway Science. All right reserved.

引用

页码：42 / 50

页数：8

共 28 条

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