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논문 기본 정보

자료유형
학술저널
저자정보
Hwan Seon Nah (KEPCO Research Institute) Hoon Jung (KEPCO Research Institute) Hyeon Ju Lee (KEPCO Research Institute)
저널정보
한국비파괴검사학회 비파괴검사학회지 비파괴검사학회지 제38권 제2호
발행연도
2018.4
수록면
126 - 134 (9page)
DOI
10.7779/JKSNT.2018.38.2.126

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초록· 키워드

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High-strength bolts are used for connection of steel structures, and these are mainly of the torque shear type, which are designed to fracture by shear force at a predetermined torque. Although the manufacturers specify the clamping load of high-strength bolts dependent on diameter, no method has been available for measuring the clamping force at the onsite, when the bolt is actually fastened. Thus, a nondestructive testing method was developed the first in the world, that can measure the clamping load when fastening the bolt to an actual steel structure joint. There are two key elements in this method: the algorithm that synchronizes the load displayed in the clamping force meter taken form the existing analog device and measures the amount of cumulative electric energy required by the electric torque wrench, which is used for fastening the bolts at the time of measurement, and the prototype of the test device that embeds this algorithm. The technique developed in this study achieved a reliability within 5%, with respect to the actual clamping load.

목차

Abstract
1. Introduction
2. Correlation between clamping force, torque, and electric energy
3. Domestic and overseas research trends
4. Experimental planning and analysis
5. Configuration of clamping force test device
6. Conclusion
References

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