Abstract
In this study, the seismic response of the fluid-structure interaction (FSI) of an undersea tunnel in a broken fault zone during a bidirectional earthquake is examined. An undersea tunnel FSI model that accounts for the effects of the viscoelastic artificial boundary, seepage, and dynamic liquid pressure, and considers the rock mass as a saturated porous medium, is created through finite element analysis software ADINA. The seismic response of the undersea tunnel is determined by considering both horizontal and vertical ground motion and analyzing the time history curve of the displacement, acceleration, and principal stress of the lining key point. Numerical results show that (1) the maximum displacement, acceleration, and tensile stress of the lining structure are all present in the vault area; (2) the time history curves of the displacement, acceleration, and principal stress of the key points follow a similar variation law; (3) the vertical displacement of the lining structure is greater than its horizontal displacement; and (4) tensile areas generally appear in the vault and inverted arch, but the hance is in the compression state.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 64-70 |
| Number of pages | 7 |
| Journal | Ocean Engineering |
| Volume | 75 |
| DOIs | |
| State | Published - 2014 |
Funding
This paper is a part of the national key basic research and development plan of China ( 973 plan ; Grant number: 2011CB013600 ), and a part of the national natural science foundation of China (Grant number: 51368039 ).
Keywords
- Bidirectional earthquake
- Fluid-structure interaction
- Seepage
- Seismic response
- Undersea tunnel
ASJC Scopus subject areas
- Environmental Engineering
- Ocean Engineering