| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
For steel bridges, an application of high strength steels has been known one of the effective approaches on weight reduction and cost saving for construction and transportation. According to the requirements, steels for bridge high performance structures (SBHS) developed newly in Japan have been recently focused on the application due to its higher strength and beneficial weld ability and work ability. However, it has been known that fatigue strength of welded joints may be independent of the steel tensile strength of base metal, which results in difficulty of using high strength steels to steel bridges efficiently. Therefore, fatigue strength of welded joints made of high strength steels must be enhanced.The evaluation results based on a model proposed in a previous study considering a unique parameter of this study in terms of fatigue limit of SBHS700 base plate may provide a better evaluation for lower limit of the fatigue test results.
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