The standard earthquake resistant design method of quay wall against a level-one earthquake ground motion is a pseudo-static method and is not necessarily in harmony with the failure mechanism of quay walls. Therefore, authors proposed a frame model for the evaluation of the seismic performance of sheet pile quay wall with vertical pile anchorage in the previous study. This study aims at improving the frame model proposed in the previous study for the precise reproduction of the deformation of quay wall. Major improvement was made on the evaluation of soil reaction spring model for the deformation of sheet pile and the model for the calculation of residual deformation of soil layers beneath the sheet pile.
