Abstract
Model experiments on hydrodynamic forces by run-up tsunami were carried out in a wave basin, where three types of tsunami were generated. Circular cylinders were used as models of oil storage tanks located at a storage area in a harbor. A force transducer was attached to the cylinders and three-component forces acting on the cylinders were measured. Measurement of water levels and velocities were carried our in the absence of a cylinder. Characteristics of the hydrodynamic forces were discussed by comparing wave and current fields. Impulsive forces were observed at an instance of collision with run-up tsunami. After the tsunami ran up, the water level rose for a long time and thus the drag and inertia forces became predominant. The effects of protection walls for oil spill and interaction with other cylinders were also discussed.
