Open AccessDynamic response analysis of submarine tunnel under different wave loads
Author(s) -
Zhiyong Ouyang,
Peijie Li,
Ruofan Luo,
Zhuojun Feng
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/371/2/022044
Subject(s) - seabed , biot number , geology , geotechnical engineering , wave loading , consolidation (business) , pore water pressure , liquefaction , mechanics , submarine pipeline , physics , oceanography , accounting , business
Based on theory of Biot’s dynamic consolidation and the elastic dynamics, this paper considers seabed soil and the contact effect of the tunnel, the seabed soil along the depth direction variability and viscoelastic boundary. The two-dimensional finite element model is established to compare the wave force acting on the seabed surface, which causes the internal stress of the tunnel and its dynamic response of the seabed in the first-order elliptic linear wave, cosine wave and the second order stokes wave. Results show that when the relative water depth is larger, the first-order elliptical cosine wave theory used to calculate the dynamic response of the seabed-tunnel will underestimate the seabed soil liquefaction resistance and tunnel resistance to deformation ability. And when the relative water depth is smaller, the linear wave theory to solve the dynamic response of the seabed-tunnel will overestimate the seabed soil liquefaction resistance and the ability to resist deformation of the tunnel. With the increase of L/d and T wave parameter, the first-order elliptical cosine wave and the degree of nonlinear second order stokes wave are in increase. Compared with the linear wave, the seabed soil around the tunnel of pore water pressure, displacement and the internal stress amplitude of the tunnel are obviously increasing.