Abstract
Laboratory experiments on tsunami wave force were carried out to investigate a drag force acting on a horizontal pipeline and oil tanks. The vertical distributions of model tsunami wave force were measured at the location from the seawall. The maximum wave forces were found to be occurred at the location just behind where waves begin to break. Wave forces were estimated by using the CADMAS-SURF and compared with the experimental results. The agreement between them is fairly good when the drag coefficient is assumed to be 0.7 to 1.0.