| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Outline of Final Research Achievements |
This study was done with the aim of proposing a new evaluation method of brittle fracture during earthquakes which may occur in steel structures. Especially, we focused on the treatment of brittle fracture transition from shallow initial cracks because those fracture were not considered in existing design cords or guidelines, for example WES 2808. On the basis of trials of some fracture mechanics approaches, it was shown introducing modified Weibull stress approach is effective to consider some dominant relative factors and to estimate critical condition of brittle fracture transition during earthquakes including those from shallow initial cracks. Based on the finding, an example of simplified evaluation procedure for brittle fracture during earthquakes in beam to column connections of steel bridge piers was also provided.
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