ABSTRACT
In the Pacific coastal area around Shikoku Island especially Kochi prefecture, Japan, serious damage from the Nankai Trough earthquake and resulting tsunami is expected. Eighty-eight fishing ports around the Kochi coastline are particularly at risk. Therefore, seismic retrofits are necessary because ports function not only as a workplace for fishermen, but also as bases for rescue and restoration following disasters. Furthermore, according to the 2011 Great East Japan Earthquake damage investigation report, fishing ports functioned as important bases for transportation of emergency supplies. In this study, effectiveness of seismic retrofits using double wall sheet piling and precast concrete slabs proposed by the authors were verified by seismic response analysis applying the dynamic effective stress method and experimental study using a dynamic centrifuge representing Kaminokae Fishing Port in southwestern Kochi Prefecture as a case model.
