STUDY ON SIMPLE MODELING FOR LATERAL RESISTANCE OF RETAINING WALL IN COLLISION WITH A BASE-ISOLATED STRUCTURE

In this paper, impulse response is calculated by 3D-FEM collision analysis at the time of a base-isolated structure colliding to retaining wall, and its simple modeling method of lateral resistance of retaining wall is proposed considering the backfill soil existence. Lateral resistance of retaining wall with backfill soil is modelled by applying dynamic iteration springs and dashpots. The lateral resistances of retaining wall with backfill soil by the proposed method are compared with 3D-FEM analysis results. There is a little difference in maximum displacement response. Moreover, collision analyses of the base-isolated structure are conducted using the proposed method and 3D-FEM, and responses by both methods are compared and discussed.