Shaking Table Model Test of Loess Tunnel

doi:10.19721/j.cnki.1001-7372.2021.06.014

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Shaking Table Model Test of Loess Tunnel
	Cheng, Xuan-Sheng 1,2; Zhou, Xin-Hai 1,2; Wang, Ping 3; Chai, Shao-Feng 3; Feng, Huan 4; Yang, Li-Ping 5
刊名	Zhongguo Gonglu Xuebao/China Journal of Highway and Transport
	2021-06-01
卷号	34 期号:6 页码:136-146
关键词	Arches Dynamic response Linings Pressure distribution Rain Retaining walls Sediments Seismic response Seismic waves Strain rate Acceleration condition Lateral acceleration Rainfall condition Shaking table model test Spectral characteristics Surrounding rock structures Synergistic effect Vertical accelerations
ISSN号	10017372
DOI	10.19721/j.cnki.1001-7372.2021.06.014
英文摘要	To study the seismic response of the loess tunnel structure and the damping effect of the rubber damping layer under different seismic fields and rainfall conditions, a 1: 40 damping loess tunnel and non-damping loess tunnel were designed and constructed according to similar theories. Under the conditions of a total rainfall of 50 mm (a rainfall intensity of 10 mm•h-1), the near seismic wave (El-Centro wave) and far-field seismic wave (Taft wave) were applied. The changes in the seismic response and earth pressure around the loess tunnel measuring points under different acceleration conditions of the seismic wave were compared. The damping efficiency of the loess tunnel was analyzed through the strain changes at each measuring point of the damping and non-damping models. The results demonstrate that when the amplitude modulation and duration are the same, the loess tunnel structure exhibits obvious selectivity for different seismic motions. The dynamic response under the El-Centro seismic motion condition is greater than that of the Taft seismic motion condition, indicating that the dynamic response of the structure around the loess tunnel depends not only on the intensity and duration of the seismic motion, but also on the spectral characteristics of the seismic wave. The response of the loess tunnel structure to near-field seismic waves is greater than that of far-field seismic waves. When the model is loaded laterally, the lateral and vertical acceleration of each model point are changed, and the lateral acceleration response is greater than the vertical acceleration response. Moreover, the earth pressure at the vault position is relatively large. Although the earth pressure at the arch foot position is relatively small, the strain changes significantly and the stress concentration is obvious. The strain values of different parts of the lining are reduced by setting the damping layer, and greater strain results in a higher damping rate. The strain damping rate of the vault and arch foot is close to 50% under different working conditions. Setting the damping layer can reduce the deformation of the lining structure, absorb seismic energy, exert the synergistic effect of the surrounding rock structure and lining structure, and reduce the crack width and depth of the soil. © 2021, Editorial Department of China Journal of Highway and Transport. All right reserved.
语种	中文
出版者	Chang'an University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151127]
专题	土木工程学院
作者单位	1.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of the Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Key Laboratory of Loess Earthquake Engineering, Lanzhou Institute of Seismology, CEA, Lanzhou; 730000, China; 4.School of Civil Engineering & Mechanics, Huazhong University of Science and Technology, Wuhan; 430074, China; 5.Gansu Building Research Institute, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Cheng, Xuan-Sheng,Zhou, Xin-Hai,Wang, Ping,et al. Shaking Table Model Test of Loess Tunnel[J]. Zhongguo Gonglu Xuebao/China Journal of Highway and Transport,2021,34(6):136-146.
APA	Cheng, Xuan-Sheng,Zhou, Xin-Hai,Wang, Ping,Chai, Shao-Feng,Feng, Huan,&Yang, Li-Ping.(2021).Shaking Table Model Test of Loess Tunnel.Zhongguo Gonglu Xuebao/China Journal of Highway and Transport,34(6),136-146.
MLA	Cheng, Xuan-Sheng,et al."Shaking Table Model Test of Loess Tunnel".Zhongguo Gonglu Xuebao/China Journal of Highway and Transport 34.6(2021):136-146.