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Earthquake input mechanism for time-domain analysis of tunnels in layered ground subjected to obliquely incident P- and SV-waves
Zhao, Wusheng; Chen, Weizhong; Yang, Diansen; Tan, Xianjun; Gao, Hou; Li, Can
2019
Source PublicationENGINEERING STRUCTURES
ISSN0141-0296
Volume181Issue:-Pages:374-386
AbstractTime-domain analyses have been widely used to investigate the seismic responses of tunnels. However, the earthquake-input mechanism which significantly influences the results, is not clearly understood, and most extant studies focused on vertically propagating waves. In this study, a series of numerical calculations were conducted to evaluate the performance of several earthquake-input methods for three typical models. The results demonstrate that the combinations of the model base and the input motion should correctly consider the interaction between the two sides of the boundary. Generally, the incident motion at the inner side of the boundary should be used with an elastic base, whereas the within motion at the boundary can be used with a rigid base. However, the rigid base is appropriate only for cases with a large impedance contrast between the two sides of the boundary and cases without outgoing waves at the boundary. Then, an earthquake-input method for the time-domain analysis of tunnels in layered ground subjected to obliquely incident P- and SV-waves was proposed. In this method, the pure incident motion at the model base is applied with an elastic base, whereas the within motions at the left boundary are applied with a rigid base. In addition, the right boundary is characterized by absorbing-elements. The closed-form solutions of the applied motions at the boundaries were presented. The proposed earthquake-input method was verified by comparing with closed-form solutions for two specific problems.
KeywordEarthquake-input Tunnel Obliquely incident Time-domain Input motion
DOI10.1016/j.engstruct.2018.12.050
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Civil
WOS IDWOS:000456754400028
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://119.78.100.198/handle/2S6PX9GI/15045
Collection岩土力学所知识全产出_期刊论文
国家重点实验室知识产出_期刊论文
AffiliationChinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Wusheng,Chen, Weizhong,Yang, Diansen,et al. Earthquake input mechanism for time-domain analysis of tunnels in layered ground subjected to obliquely incident P- and SV-waves[J]. ENGINEERING STRUCTURES,2019,181(-):374-386.
APA Zhao, Wusheng,Chen, Weizhong,Yang, Diansen,Tan, Xianjun,Gao, Hou,&Li, Can.(2019).Earthquake input mechanism for time-domain analysis of tunnels in layered ground subjected to obliquely incident P- and SV-waves.ENGINEERING STRUCTURES,181(-),374-386.
MLA Zhao, Wusheng,et al."Earthquake input mechanism for time-domain analysis of tunnels in layered ground subjected to obliquely incident P- and SV-waves".ENGINEERING STRUCTURES 181.-(2019):374-386.
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