EXPERIMENTAL STUDY ON TSUNAMI FORCES: ESTIMATION OF TSUNAMI FORCE ACTING ON STRUCTURES RELATED TO RUN UP DISTANCE, SCALE OF BUILDING AND PRESSURE DISTRIBUTION

The hydraulic experiments have been carried out for estimating tsunami wave force through water level, velocity, force and pressure measurements. Model of building was placed at several points with certain distance from shoreline. Wave force had been estimated by assuming as hydrostatic forces which only consider inundation depth while wave velocity data used as hydrodynamic forces assumption. Force estimation through integrating wave pressure had been conducted at almost all element on exposed area to ensure the effect of model’s breadth on magnitude of wave force (not only on the middle). However gap of time lag occurred certainly on each line of measurement points have been found. Therefore, precise estimation of wave force through wave pressure measurement seems very difficult. Present study data were compared to the past of available design guidelines for tsunami forces (Asakura et.al.2000) and some available data from past experiments (Yeom et.al.2007-2008) which had analyzed in order to check the validity of some tsunami wave force estimation methods. Some modification equations that refer to function of maximum inundation depth, maximum velocity and run up distance from shoreline are proposed for more considerable agreement of tsunami wave forces estimation