Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (10): 3049-3058.doi: 10.16285/j.rsm.2023.0795

• Numerical Analysis • Previous Articles     Next Articles

Analytical solution of imperfect contact effect at the interface between undersea tunnel and seabed soil under plane P1 waves incidence

ZHU Sai-nan1, 2, CHEN Yan-hua1, WANG Ning1, LI Wei-hua3, ZHANG Wei-wei1   

  1. 1. College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, China; 2. Earthquake Engineering Research Center of Hebei Province, North China University of Science and Technology, Tangshan, Hebei 063210, China; 3. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Received:2023-06-12 Accepted:2023-08-25 Online:2023-10-13 Published:2023-10-16
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (52078033), the Natural Science Foundation of Hebei Province of China (E2020209072), the Applied Basic Research Project of Tangshan Science and Technology Bureau (22130211H) and the Basic Scientific Research Business Expenses Research Projects of Colleges and Universities in Hebei Province (JQN2023018).

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Abstract: Based on the ideal fluid wave theory and Biot’s theory, an undersea tunnel model with imperfect interface is established by considering the imperfect contact relationship between the undersea tunnel and the surrounding seabed soil in engineering reality. The model also considers the dynamic interaction of seawater-seabed soil-undersea tunnel. The analytical solution of the imperfect contact interface effect between the undersea tunnel and the surrounding seabed soil under P1 waves incidence is derived using the Hankel function integral transformation method and the wave function expansion method. Based on the analytical solution, the effects of imperfect contact conditions on the seismic dynamic response of the undersea tunnel are analyzed by numerical calculations. The calculation results show that the imperfect contact condition has a significant effect on the displacement response and stress response of the undersea tunnel; the displacement response and stress response of the undersea tunnel considering the imperfect contact condition at the tunnel-seabed soil interface are significantly higher than those at the interface with perfect conditions.

Key words: undersea tunnel, imperfect contact, analytical solution, scattering problem, seismic response

CLC Number: 

  • U459.5
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