岩土力学Issue(7)：2095-2102,8.
输水隧道地震响应的多物质ALE数值分析
Numerical simulation of multi-material ALE method for diversion tunnel seismic response
摘要
Abstract
In order to study the seismic response of shallow diversion tunnel considering sloshing amplitude of the water, an analytical model of tunnel-soil-fluid is proposed taking account of nonlinear material behavior of soil, viscoelastic artificial boundary, the effective rigidity ratios and fluid-solid coupling. Firstly, the hoop, radial and axial structural rigidities of tunnel lining are obtained by numerical rigidity reduction tests. Furthermore, the orthotropic material is used in tunnel lining model. As an application, the seismic responses of a project of large-diameter parallel diversion tunnels, which is one of the key projects in Shanghai, are calculated using the multi-material arbitrary Lagrangian-Eulerian (ALE) method. The equivalent density method is then used to validate the established simulation model. Finally, two seismic input modes, the uniform and nonuniform excitations, are involved in the seismic analyses of the tunnel-soil-fluid system. The numerical results show that under horizontal earthquake excitation the influence of fluid on tunnel's displacement is small;however, the influences of fluid on both stress and deformation of the section are great. The tunnel moment are always focused on the position of the tunnel 45° cross-hatched. Comparing with the uniform seismic input, the results show that the nonuniform excitation can remarkably increase both displacement and deformation responses of the tunnel.关键词
输水隧道/多物质ALE/有效刚度/流-固耦合/地震响应Key words
diversion tunnel/multi-material ALE/effective rigidity/fluid-solid coupling/seismic response分类
数理科学引用本文复制引用
楼云锋,杨颜志,金先龙..输水隧道地震响应的多物质ALE数值分析[J].岩土力学,2014,(7):2095-2102,8.基金项目
国家自然基金项目(No.11072150，No.61073088)；国家863重大项目课题(No.2012AA01AA307)。 （No.11072150，No.61073088）
