Abstract
Evaluation method of interaction between structure and ground is an important subject in seismic design for long underground structures. Authors has been discussed the seismic displacement method in which input ground displacement is calculated by using free ground model. But, the method has the possibility to have difference between analyses and real behavior in the case where the ground is irregular or structures like shaft and joints are inserted in the tunnel. From this point of view, authors compared the results by the 3-D FEM analysis with those by the seismic displacement method, and investigated the modeling of structures and joints.
