抄録
The tank fires of Tokachioki earthquake in 2003 made the people attending aware of seismic performance of tanks. And it reminded people that tanks have possibilities to make catastrophic disaster against environment because of their large volume, once their contents are leaked out. So development of procedure for seismic risk management of tanks is required. Authors have already pointed out the fact that the responses of tanks at seismic events are affected by their volume of contents. This study is positioned as fundamental study of the seismic risk control by adjusting liquid height. Damage modes of the cylindrical storage tanks with floating roofs are extracted. The effect of occurrence of the damage modes of tanks by variation of liquid height are discussed.
