Dynamic Response of a Tunnel Lining Under the Coupled Influence of Near-Field Effects and an Elastic–Slip Interface
Source abstract
Abstract
This paper presents an analytical solution for near-field cylindrical P-wave scattering by a circular tunnel. A comprehensive elastic–slip interface model is incorporated to capture localized discontinuous deformations and frictional sliding. Employing the wave function expansion method and Graf’s addition theorem, the dynamic stress concentration factor (DSCF) of both soft and stiff linings is systematically investigated. The results reveal that near-field wavefront curvature severely amplifies stress concentration on the illuminated side, degenerating into a plane-wave response only when the dimensionless source distance exceeds 50. Furthermore, within the parameter range considered, the imperfect interface exhibits a dual “flexible barrier” effect heavily influenced by impedance matching: it tends to act as a seismic isolator that reduces the DSCF for stiff linings, but can weaken boundary confinement and exacerbate stress concentration for soft linings. These findings provide crucial theoretical insights for the blast-resistant design of underground structures.
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Research context
OpenAlex topics: Geotechnical Engineering and Underground Structures · Seismic Waves and Analysis · Seismic Imaging and Inversion Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Jiangxi Communications Investment Maintenance Technology Group Co., Ltd., Nanchang 330200, China
Jiangxi Provincial Key Laboratory of Highway Bridge and Tunnel Engineering, Nanchang 330200, China
State Key Laboratory of Safety and Resilience of Civil Engineering in Mountain Area, East China Jiaotong University, Nanchang 330013, China
Funding
Jiangxi Province’s Leading Talent Program for Cultivating Academic and Technical Leaders in Major Disciplines · Jiangxi Outstanding Talent Support Program—A project for cultivating academic and technical leaders in major disciplines · Science and Technology Project of Jiangxi Provincial Department of Transportation
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