Abstract
The displacement of an inland movable structure induced by run-up tsunamis and local scouring is investigated using a three-dimensional coupled fluid-structure-sediment interaction model. Numerical results show that appropriate paratemeters of the sand substrate can improve the predictive capability of the model in terms of the distribution of the final topographic change and the behavior of the structure. Furthermore, it is revealed that reaction force acting on the structure is affected by not only the tsunamis but also the local scouring, suggesting that it is essential to take into account the effects of local scouring when evaluating the stability of movable structures. In addition, it is found that sheet piles in the sand substrate at the longshore side of the structure would be effective to improve the stability of the structure.
