자속투과율을 이용한 부착식 PSC 강선의 긴장응력 추정 타당성 연구
A Feasibility Study for Estimating Prestressed Stress on a Steel Wire Using Permeability of Magnetic Flux
0
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
This work examines the feasibility for estimating existing tensile stress on a stressed wire using the permeability of magnetic flux. A closed magnetic circuit has been constructed to induce magnetic flux inside a steel wire. With different tension stress levels on a wire, the permeability of magnetic flux on the wire has been measured. Two different experimental case studies have been conducted for the examination of sensitivity of permeability of magnetic flux on the stressed wire. One is a varying-length stress test, and the other is a fixed-length stress test. The results show that the permeability of magnetic flux in the varying-length stress test is inversely proportional to the applied stress, while the permeability in the fixed-length stress test is linearly proportional to the applied stress on the stressed wire. It is thus expected that the permeability of magnetic flux on a wire can be a promising indicator for the inspection of its tensile stress.
Abstract
This work examines the feasibility for estimating existing tensile stress on a stressed wire using the permeability of magnetic flux. A closed magnetic circuit has been constructed to induce magnetic flux inside a steel wire. With different tension stress levels on a wire, the permeability of magnetic flux on the wire has been measured. Two different experimental case studies have been conducted for the examination of sensitivity of permeability of magnetic flux on the stressed wire. One is a varying-length stress test, and the other is a fixed-length stress test. The results show that the permeability of magnetic flux in the varying-length stress test is inversely proportional to the applied stress, while the permeability in the fixed-length stress test is linearly proportional to the applied stress on the stressed wire. It is thus expected that the permeability of magnetic flux on a wire can be a promising indicator for the inspection of its tensile stress.
참고문헌 (16)
- Prestress Losses in Pretensioned high-strength concrete bridge girders, "Tadros MK", Transportation Research Board, ~, pp.NCHRP Report, No. 496 (2001)
- Chen HL, "Measurement of tensile forces in a seven-wire prestressing strand using stress waves", Journal of Engineering Mechanics, 127(6), pp.599~606 (2001), ASCE
- Chen HL, "Application of Wigner-Villw Transform to evaluate tensile forces in seven-wire prestressing strands", Journal of Engineering Mechanics, 128(11), pp.1206~1214 (2002), ASCE
- Washer GA, "Velocity constants for ultrasonic stress measurement in prestressing tendons", Res. Nondestr, Eval, 14, pp.81~94 (2002)
- Scalea FL, "Stress measurement and defect detection in steel strands by guided stress waves", Journal of Materials in Civil Engineering, 15(3), pp.219~227 (2003), ASCE
- Rizzo P, "Ultrasonic wave propagation in progressively loaded multi-wire strands", Experimental Mechanics, 46, pp.297~306 (2006)
- Chaki S, "Stress level measurement in prestressed steel strands using acoustoelastic effect", Experimental Mechanics, 49, pp.673~681 (2009)
- Beard MD, "Ultrasonic guided waves for inspection of grouted tendons and bolts", Journal of Materials in Civil Engineering, 15(3), pp.212~218 (2003), ASCE
- Kim BH, "Effect of prestress force on longitudinal vibration of bonded tendons embedded in a nuclear containment", Nuclear Engineering and Design, 240(6), pp.1281~1289 (2010)
- Kim BH, "Evaluating longitudinal vibration characteristics of bonded strands embedded in prestressed concrete beams by a system identification approach", Composite: Part B, 43, pp.1531~1537 (2012)
- 김병화, "부착식 PSC 텐던의 종진동 탄성파 속도의 추정 방법", 한국방재학회논문집, 12(2), pp.41~45 (2012), 한국방재학회[DOI]
- 김병화, "응력파속도를 이용한 부착식 PSC 텐던의 긴장력 추정", 대한토목학회 논문집A, 32(5), pp.289~297 (2012), 대한토목학회
- Jang JB, "An assessment of the prestress force on the bonded tendon by SI and impact signal techniques", Nuclear Engineering and Design, 255, pp.9~15 (2013)
- Baudendistel TA, "A novel inverse-magnetostrictive force sensor", IEEE Sensor Journal, 7(2), pp.245~250 (2007)
- Calkins FT, "Overview of magnetostrictive sensor technology", Journal of Intelligent Material Systems and Structures, 18, pp.1057~1066 (2007)
- Moriya T, "Magnetic nondestructive evaluation of corrosion in wire ropes", Proceedings of MITTS, 2004, pp.4, 1910~1917[DOI]