| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
On the structural rigidity of modern timber bridges by many years past, the rigid reduction of the modern timber bridge past in about ten years will not be seen after a build about the structural rigidity. However, structural rigidity will fall to a suddenly about 40% after a construction in 20 years or more. In other words, it became clear that the residual strength decreased quantitatively to about60%. Furthermore, from the result of estimation of the durable years based on valuation of the residual strength of modern timber bridges, It is acquired the finding that can develop maintenance-preventionsystem which can presume the durable years probabilistically.
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