Abstract
It is important to know whether a coastal dike maintain its functions to protect the hinter-area against disastrous tsunami accompanying giant earthquake. However, it has been thought almost impossible because the length of dikes is extensive and the level of techniques needed for the evaluation is high and complicated. There is, therefore, an urgent demand for a practical seismic performance evaluation technique. The authors have developed and propose a simple technique depending on the results of hydraulic experiments as well as numerical analyses, taking into account the shape of a coastal structure and ground conditions.
