建築物に作用する津波遡上流による流体圧の評価法に関する研究: 第1報 MPS法による数値シミュレーション法の適用性

摘要

2011年3月11日には東北地方でマグニチュード9.0の東北地方太平洋沖地震が発生した。この地震により津波が発生し，陸上に遡上した津波により建築物の破壊，倒壊，建築物内部への浸水による建築的機能の喪失などが発生し，沿岸域の都市は壊滅的被'きに遭つた。%The authors propose the suitable way of simulation with the MPS method when run-up tsunami acts on architecture in this paper. 1. The MPS method that is semi implicit method costs a lot of computational time. For this reason, to use the wave maker with the functionality of inflow-outflow for decreasing particle number lead to high-speed simulation. 2. In the MPS method, detection accuracy of free surface is low. and it leads to pressure oscillation. The new way focusing on continuity of free-surface-particles is able to improve the accuracy of detecting free surface, and to reduce pressure oscillation. 3. The authors reproduce Tsunami acting on an architecture with the tank experiment and the MPS method with the new way developed and the proposed method, and compare tsunami pressure acting on the front of it. As a result, the MPS method is able to simulate Tsunami acting on architecture including the impulsive pressure.