| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2008: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Research Abstract |
The theory of seismic sloshing in large-capacity liquid storage tanks taking account of nonlinearities due to the liquid and the floating roof has been developed, and validated by performing the shaking table tests using reduced-scale models. The theory has been applied to clarify the mechanism of failure and submergence of the single-deck type floating roofs damaged during the 2003 Tokachioki earthquake. It was shown that the nonlinear oscillation modes produce excessively large stresses in the pontoon, which may cause the pontoon buckling followed by the submergence of the roof.
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