Study on seismic behavior and seismic design methods in transverse direction of shield tunnels

In order to investigate the seismic behavior and seismic design methods in the transverse direction of a shield tunnel, a series of model shaking tabl e tests and a two-dimensional finite element dynamic analysis on the tests are carried out. Two kinds of static analytical methods based on ground tun nel composite finite element model and beam-spring element model are propos ed, and the validity of the static analyses is verified by model shaking ta ble tests. The investigation concerns the dynamic response behavior of a tu nnel and the ground, the interaction between the tunnel and ground, and an evaluation of different seismic design methods. Results of the investigatio n indicate that the shield tunnel follows the surrounding ground in displac ement and dynamic characteristics in the transverse direction; also, the st atic analytical methods proposed by the authors can be used directly as the seismic design methods in the transverse direction of a shield tunnel.