STUDY OF THE TSUNAMI SIMULATION INCLUDING BUILDING COLLAPSE DUE TO TSUNAMI WAVE FORCE

Abstract

 Tsunami flow and structures such as buildings interact with each other. Influence of buildings on numerical simulation of tsunami inundation was studied in this paper. The three kind of methods to consider the effect of building on tsunami flow were adapted in Kesennuma city where serious damage occurred by the 2011 Tohoku tsunami. By comparison of computed inundation with measured, the wave force threshold that causes building collapse and washed-away was determined. A simulation considering the collapse of the building by using the threshold showed the influence of buildings washed-away is necessary to simulate accurate tsunami inundation.