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采用波函数展开法,给出了SV波入射引起的水下圆断面输水隧洞平面地震响应问题的解析解,并着重讨论了SV波入射时入射波传播角和地表水深对隧洞结构动力响应的影响。结果表明,当入射SV波的传播角小于临界角时,水下输水隧洞衬砌的动力响应随入射SV波传播角的增大而增大,而当SV波入射角大于临界角时,衬砌动力响应则随入射SV波传播角的增大而减小;在SV波入射时,水下输水隧洞衬砌的动力响应峰值随地表水深的增大而略有减小,但地表水深的改变对衬砌动力响应的分布影响不大。
The analytical solution to the plane seismic response of a submerged round cross-section water conveyance tunnel caused by the incident SV wave is given by using the wave function expansion method. The dynamic response of the SV wave incidence to the tunnel structure with the incident wave propagation angle and surface water depth is also discussed influences. The results show that when the propagation angle of incident SV wave is less than the critical angle, the dynamic response of underwater tunnel lining increases with the propagation angle of SV wave. When the incidence angle of SV wave is larger than the critical angle, The response decreases with the propagation angle of incident SV wave. When the SV wave is incident, the peak value of dynamic response of tunnel lining decreases slightly with the increase of surface water depth, but the change of surface water depth affects the lining The distribution of dynamic response has little effect.