SIMPLIFIED ESTIMATION METHOD FOR WATER DEPTH CHANGES AND TSUNAMI LOAD ON STRUCTURES DUE TO TSUNAMI INUNDATION FLOW WITH SEA ICE FLOES

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  • 海氷群を伴う津波氾濫流の建築物近傍での水深変化と津波荷重の簡易推定法

Abstract

<p> We found mechanisms/processes behind the action of force caused by a tsunami with ice floes; i) the collision force imparted by the ice floes, ii) a large static force caused by the formation of ice jams between the structures, and iii) horizontal active pressure caused by ice pile-up, which may result in steady residual loading even after the tsunami recedes. A simple theoretical model was developed to estimate the inundation depth and forces acting on structures, caused by tsunami run-up flow with ice flow, using only a single parameter of open ratio regardless of structure width and pitch. The proposed model may be useful for designing evacuation facilities and oil tanks, as well as arrangement plans for these structures.</p>

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