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Seismic Response Analysis of Subsea Tunnels Under the Influence of Overlying Seawater
The safety of subsea tunnels during earthquakes is a crucial factor in the design process. It is appropriate to consider the impact of the seawater above when assessing the seismic resistance of a subsea tunnel. In this paper, finite element models of the seawater-seabed-tunnel structure system are established using ABAQUS software to investigate the fluid–structure interaction and plastic damage of the lining. The seismic response and damage characteristics of the subsea tunnel are compared at various seawater depths. The study found that the overlying seawater inhibits the vertical movement of the seabed surface, but has minimal effect on the horizontal movement. With the increase in seawater depth, the stress on the tunnel structure will noticeably increase, with the spandrel and arch foot becoming the weak points in seismic design. Overlying seawater will increase the dissipation energy of the tunnel system, leading to tunnel damage. When the seawater depth exceeds 20 m, the tunnel system’s dissipation energy at varying depths of seawater will significantly increase.
Seismic Response Analysis of Subsea Tunnels Under the Influence of Overlying Seawater
The safety of subsea tunnels during earthquakes is a crucial factor in the design process. It is appropriate to consider the impact of the seawater above when assessing the seismic resistance of a subsea tunnel. In this paper, finite element models of the seawater-seabed-tunnel structure system are established using ABAQUS software to investigate the fluid–structure interaction and plastic damage of the lining. The seismic response and damage characteristics of the subsea tunnel are compared at various seawater depths. The study found that the overlying seawater inhibits the vertical movement of the seabed surface, but has minimal effect on the horizontal movement. With the increase in seawater depth, the stress on the tunnel structure will noticeably increase, with the spandrel and arch foot becoming the weak points in seismic design. Overlying seawater will increase the dissipation energy of the tunnel system, leading to tunnel damage. When the seawater depth exceeds 20 m, the tunnel system’s dissipation energy at varying depths of seawater will significantly increase.
Seismic Response Analysis of Subsea Tunnels Under the Influence of Overlying Seawater
Lecture Notes in Civil Engineering
Wang, Weiqiang (editor) / Wang, Chengzhi (editor) / Lu, Yang (editor) / Huang, Weizhen (author) / He, Cong (author) / Xu, Guoyuan (author)
2024-11-08
12 pages
Article/Chapter (Book)
Electronic Resource
English
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