Abstract
The tsunami caused by the great east Japan earthquake lead to collapse infrastructures including bridge and breakwater. It is important to reconsider disaster prevention and mitigation techniques towards next millennium tsunami. Currently, most of local governments in Japan are promoting the selection and specification of tsunami refuge buildings for people who live in the difficult area to evacuate within the limited time. However it's difficult to settle the design code of tsunami refuge building because there are so many incertitude accident during tsunami related to water induced impact force, buoyancy force, tumble of the building and so on. Numerical simulation by a particle method has been conducted for the evaluation of tsunami fluid force acting on tsunami refuge building as a first step. Finally, efficiency and adequacy of numerical simulation in the design of tsunami fluid force has been discussed by comparing with the current design code in Japan.
