| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
In this research, the following results were obtained.
[1] In case of FRP and steel joints using high strength bolts, tensile load of bolt decreases approximately linearly according to the logarithmic time history. [2] Severe compressive stress acts on the FRP material around the bolt, but the stress can be reduced by using large steel washer. [3] The present estimation method for aging change of bolt tension can be apply for evaluation the bolt tension for various diameter of bolt, initial bolt tension as well as diameter of washer. Based on these results, it was shown that frictional joint design is possible by the proposed methods. [4] Moreover, it is clarified that high joint rigidity and strength can be obtained using bolts of small diameter, and it is expected that the joint method relates a new joining technique of FRP composite structures.
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