气候变化领域集成服务门户(CCPortal): Seasonal differences in seismic responses of embankment on a sloping ground in permafrost regions

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DOI	10.1016/j.soildyn.2015.01.005
	Seasonal differences in seismic responses of embankment on a sloping ground in permafrost regions
	Li, Shuangyang; Lai, Yuanming; Zhang, Mingyi; Yu, Wenbing
发表日期	2015
ISSN	0267-7261
EISSN	1879-341X
起始页码	122
结束页码	135
卷号	76
英文摘要	Because of its direct influence on the amount of unfrozen water and on the strength of intergranular ice in a frozen soil, temperature has a significant effect on all aspects of the mechanical behavior of the active layer in which temperature fluctuates above and below 0 degrees C. Hence seismic responses of engineering structures such as embankment on a sloping ground in permafrost regions exhibit obvious differences with seasonal alternation. To explore the distinctive seismic characteristics of a railway embankment on the sloping ground in permafrost regions, a coupled water-heat-dynamics model is built based on theories of heat transfer, soil moisture dynamics, frozen soil mechanics, soil dynamics, and so on. A well-monitored railway embankment on a sloping ground in Qinghai-Tibet Plateau is taken as an example to simulate seismic responses in four typical seasons in the 25th service year. The numerical results show that seismic acceleration, velocity and displacement responses are significantly different in four typical seasons, and the responses on October 15 are much higher among the four seasons. When the earthquake is over, there are still permanent differential deformations in the embankment and even severe damages on the left slope on October 15. Therefore, this position should be monitored closely and repaired timely to ensure safe operation. In addition, the numerical model and results may be a reference for maintenance, design and study on other embankments in permafrost regions. (c) 2015 Elsevier Ltd. All rights reserved.
英文关键词	Embankment on a sloping ground; Seasonal difference; Seismic response; Numerical model; Permafrost region
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS关键词	QINGHAI-TIBET RAILWAY ; MASS-TRANSFER ; COUPLED HEAT ; PLATEAU ; SOILS ; EARTHQUAKE ; TRANSPORT ; MODEL
WOS记录号	WOS:000357226200012
来源期刊	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239494
作者单位	[Li, Shuangyang; Lai, Yuanming; Zhang, Mingyi; Yu, Wenbing] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuangyang,Lai, Yuanming,Zhang, Mingyi,et al. Seasonal differences in seismic responses of embankment on a sloping ground in permafrost regions[J],2015,76.
APA	Li, Shuangyang,Lai, Yuanming,Zhang, Mingyi,&Yu, Wenbing.(2015).Seasonal differences in seismic responses of embankment on a sloping ground in permafrost regions.SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,76.
MLA	Li, Shuangyang,et al."Seasonal differences in seismic responses of embankment on a sloping ground in permafrost regions".SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 76(2015).