Abstract

There was a fire at a crude oil tank in Tomakomai City after the 2003 Tokachroki Earthquake. A nearby naphtha tank caught fire two days after the earthquake and the fire became an "open top fire". Moreover, floating roofs sank beneath the oil in seven tanks after the earthquake. There also occurred a considerable number of oil leakage accident in many oil storage tanks in Tomakomai City. The authors have investigated the damage to the tanks. The crude oil tank that caught a ring fire was a floating roof tank and had a capacity of 30,000kl. The authors have analyzed the effect of liquid sloshing of oil on the fire by conducting time history response analysis with finite element method using strong ground motion records.

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