Seismic response of deep circular tunnels subjected to S-waves:Axial bending  

作　　者：Chatuphat Savigamin Antonio Bobet Osvaldo P.M.Vitali 

机构地区：[1]HR Engineering Services,Inc.,Medley,FL 33166,United States [2]Lyles School of Civil Engineering,Purdue University,West Lafayette,IN 47907,United States [3]Department of Civil,Environmental,and Construction Engineering,University of Hawaii at Manoa,Honolulu,HI 96822,United States

出　　处：《Underground Space》2024年第4期267-279,共13页地下空间（英文）

摘　　要：Ovaling deformation of circular tunnels has received great interest from the tunneling community because this mode of seismicinduced deformation is considered the most critical.However,there is growing evidence that other deformation modes can also be important and thus need to be considered in design.This study presents a new analytical solution to estimate axial bending(snaking),a mode of deformation caused by S-waves impinging on a tunnel parallel to the tunnel axis.The solution is developed using the soilstructure interaction approach with the assumption that the interface between the ground and the tunnel lining is frictionless(fullslip).Full dynamic numerical simulations are conducted to verify the new full-slip solution,together with the existing no-slip solution.Effects of dynamic amplification are also explored for both full-slip and no-slip interface conditions by changing the wavelength(or frequency)of the seismic input motions.

关 键 词：Seismic response of tunnels Analytical solutions Soil-structure interaction Axial bending Snaking S-WAVES 

分 类 号：P31[天文地球—固体地球物理学]