Modelling the Seismic Responses of a Shallow Tunnel in Liquefiable Soil

Underground structures might experience a sequence of multiple shakings in a real seismic event, since earthquakes could contain more than one strong shaking during a short period of time. The soil-structure interaction (SSI) is very much dependent on the characteristics of the shakings, because typ...

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Bibliographic Details
Published inJapanese Geotechnical Society Special Publication Vol. 10; no. 39; pp. 1470 - 1474
Main Authors Bilotta, Emilio, Zhang, Jinghua, Yang, Zhihua
Format Journal Article
LanguageEnglish
Published The Japanese Geotechnical Society 2024
Subjects
liquefaction
numerical modelling
soil-structure interaction
tunnel
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ISSN2188-8027
2188-8027
DOI10.3208/jgssp.v10.OS-28-02

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Summary:Underground structures might experience a sequence of multiple shakings in a real seismic event, since earthquakes could contain more than one strong shaking during a short period of time. The soil-structure interaction (SSI) is very much dependent on the characteristics of the shakings, because typically the behavior of the surrounding soil is stress-path dependent. In this paper, the special case of a shallow tunnel in liquefiable ground subject to multiple shakings is considered via numerical method. The OpenSees platform and the PM4Sand constitutive model are employed for the numerical modelling, where a rectangular tunnel is buried in saturated Hostun sand. The validity of the numerical model is verified by the data of a centrifuge test of four consecutive shakings. Then, the numerical soil-structure system is configured for further investigation on the subject matter, and the signature seismic response of shallow tunnel in liquefied ground, namely, the uplift, is most intensely discussed.
ISSN:2188-8027
2188-8027
DOI:10.3208/jgssp.v10.OS-28-02