| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
It is general that bolting is applied on repair and reinforcement of steel structures damaged by corrosion or fatigue. Bolting as a repair joining method has demerits like as weight increase and difficulty of work at narrow part. This study assumes application of welding on repair and reinforcement of steel structures because welding may control the weight increase and have better workability at narrow part compared with bolting.
However, welding residual stress possibly affects the structural performance of repaired members. Therefore, heat treatment by small and portable induction heating device for reduction of welding residual stress was investigated in this study. A series of experiment and numerical analysis was performed on patch joints simulating repair on damaged steel structural members. In this repair welding, a method for reducing residual stress by the portable induction heating device was proposed.
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