Abstract
On the basis of viscous-elastic artificial boundary, the ground motion input is transformed into the equivalent node load to achieve the oblique incidence of seismic waves. The two-dimensional finite element model of Nanchang Honggu immersed tunnel section is established by using finite element software. The influence of different incident angles on the dynamic response of the immersed tunnel is analyzed under the oblique incident of the SV wave. The results show that the seismic response law of the immersed tunnel is significantly different from that of the vertical incident when the SV wave is obliquely incident. The structural stress of the immersed tunnel is larger at the corner of the immersed tunnel and the junction of the intermediate partition with the floor and the roof. As the incident angle increases, the vertical response of the immersed tunnel structure increases significantly. Therefore, when seismic design analysis of the immersed tunnel is carried out, the influence of the oblique incidence of the ground motion on the dynamic response of the immersed tunnel should be considered.
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