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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.17 No.1
- 발행연도
- 2016.1
- 수록면
- 107 - 122 (16page)
이용수
초록· 키워드
오류제보하기
We propose an effective methodology using electromechanical impedance characteristics for estimating the remaining tensile force of tendons and simultaneously detecting damages of the anchorage blocks. Once one piezoelectric patch is attached on the anchor head and the other is bonded on the bearing plate, impedance responses are measured through these two patches under varying tensile force conditions. Then statistical indices are calculated from the impedances, and two types of relationship curves between the tensile force and the statistical index (TE Curve) and between statistical indices of two patches (SR Curve) are established. Those are considered as database for monitoring both the tendon and the anchorage system. If damage exists on the bearing plate, the statistical index of patch on the bearing plate would be out of bounds of the SR curve and damage can be detected. A change in the statistical index by damage is calibrated with the SR curve, and the tensile force can be estimated with the corrected index and the TE Curve. For validation of the developed methodology, experimental studies are performed on the scaled model of an anchorage system that is simplified only with 3 solid wedges, a 3-hole anchor head, and a bearing plate. Then, the methodology is applied to a real scale anchorage system that has 19 strands, wedges, an anchor head, a bearing plate, and a steel duct. It is observed that the proposed scheme gives quite accurate estimation of the remaining tensile forces. Therefore, this methodology has great potential for practical use to evaluate the remaining tensile forces and damage status in the post-tensioned structural members.
목차
등록된 정보가 없습니다.
참고문헌 (20)
참고문헌 신청
Al-Omaishi, N. / 2009 / Estimating prestress loss in pretensioned, high-strength concrete members / PCI J 54(4):132~159
Ashar, H. / 1994 / Prestressed Concrete in U. S. Nuclear Power Plants(Part 1) / Concrete Int 16(5):30~34
Bati, S.B. / 2001 / Experimental methods for estimating in situ tensile force in tie-rods / J. Eng. Mech. -ASCE 127(12):1275~1283
Beard, M. D. / 2003 / Ultrasonic Guided Waves for Inspection of Grouted Tendons and Bolts / J. Mater. Civil Eng. -ASCE 15(3):212~218
Bhalla, S. / 2002 / Influence of structure-actuator interactions and temperature on piezoelectric mechatronic signatures for NDE / Proceedings of the ISSS-SPIE Int'l Conferences on Smart Materials Structures and Systems
Ashar, H. / 1994 / Prestressed Concrete in U. S. Nuclear Power Plants(Part 1) / Concrete Int 16(5):30~34
Bati, S.B. / 2001 / Experimental methods for estimating in situ tensile force in tie-rods / J. Eng. Mech. -ASCE 127(12):1275~1283
Beard, M. D. / 2003 / Ultrasonic Guided Waves for Inspection of Grouted Tendons and Bolts / J. Mater. Civil Eng. -ASCE 15(3):212~218
Bhalla, S. / 2002 / Influence of structure-actuator interactions and temperature on piezoelectric mechatronic signatures for NDE / Proceedings of the ISSS-SPIE Int'l Conferences on Smart Materials Structures and Systems
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