Three-Dimensional Contact Model and Algorithm for Earthquake Response of Immersed Tunnel
Guo Yizhi(1),Jin Xianlong(1),Ding Junhong(1),Cao Wenhong(2),Chen Hong(2)
(1 High Performance Computing Center，Shanghai Jiao Tong University，Shanghai 200030,China)
(2 Shanghai Tunnel Engineering & Rail Transit Design And Research Institute，Shanghai 200070,China)

Abstract: Aimed at the contact between different parts in immersed tunnel, three-dimensional contact model based on supercomputer is adopted to deal with the seismic response of the immersed tunnel in Shanghai, the total model co ntains 1.2 million elements and a million nodes. The proposed model enables to shorten remarkably the CPU time of contact calculation. Taken the amplitude mod ulated Tangshan Seismic wave as the simulated input, nonlinear dynamic analysis program LS-DYNA is chosen to carry out the earthquake-resistant analysis of the immersed tunnel to provide sufficient evidences for the anti-seismic design of the immersed tunnel.
Keywords: three-dimensional contact model, immersed tunnel, earthquake response analysis, LS-DYNA.