지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.21 No.6
- 발행연도
- 2007.6
- 수록면
- 903 - 907 (5page)
이용수
초록· 키워드
오류제보하기
Using vibration methods for the damage detection and structural health monitoring in bridge structures is rapidly developing. However, very little work has so far been reported on timber bridges. This paper intends to address such shortcomings by experimental investigation on a timber beam using a vibration based method to detect damage. A promising damage detection algorithm based on modal strain energy was adopted and modified to locate/evaluate damage. A laboratory investigation was conducted on a timber beam inflicted with various damage scenarios using modal tests. The modal parameters obtained from the undamaged and damaged state of the test beam were used in the computation of damage index, were then applied using a damage detection algorithm utilising modal strain energy and a statistical approach to detect location of damage. A mode shape reconstruction technique was used to enhance the capability of the damage detection algorithm with limited number of sensors. The test results and analysis show that location of damage can be accurately identified with limited sensors. The modified method is less dependent on the number of modes selected and can detect damage with a higher degree of confidence.
목차
Abstract
1. Introduction
2. Description of test sample
3. Experimental set up
4. Modified Damage Index (MDI)
5. Experimental results
6. Conclusion
Acknowledgement
References
참고문헌 (8)
참고문헌 신청
Crews, K., Samali, B., Bakoss, S. and Champion, C., 2004, “Overview of Assessing the Load Carrying Capacity of Timber Bridges Using Dynamic Methods.” 5th Austroads Bridge Conference May 2004, Tasmania.
Li, J., Samali, B., Choi, F. C. and Dackermann, U., 2005, “Damage Identification of Timber Bridges Using Vibration Based Methods.” Proceedings of the 11th Asia–Pacific Vibration Conference, Langkawi, Malaysia: 662~668.
Morrison, A., VanKarsen, C. D., Evensen, H. A., Ligon, J. B., Erickson, J. R., Ross, R. J. and Forsman, J. W., 2002, “Timber Bridge Evaluation: A Global Non-Destructive Approach Using Impact Generated FRFs.” Proceedings of the IMAC-XX, Los Angeles, US: 15
Yoon, M. K., Heider, D., Gillespie, Jr JW., Ratcliffe, CP. and Crane, RM., 2001, “Local Damage Detection Using a Global Fitting Method on Mode Shape Data.” Proceedings of the IMAC-XIX, Kissimmee, Florida, US: 231~237.
Peterson, S. T., McLean, D. I., Symans, M. D., Pollock, D.G., Cofer, W.F., Emerson, R.N. and Fridley, K., 2001a, “Application of Dynamic System Identification to Timber Beam”: I. Journal of Structural Engineering, 127 (4): 418~425.
Li, J., Samali, B., Choi, F. C. and Dackermann, U., 2005, “Damage Identification of Timber Bridges Using Vibration Based Methods.” Proceedings of the 11th Asia–Pacific Vibration Conference, Langkawi, Malaysia: 662~668.
Morrison, A., VanKarsen, C. D., Evensen, H. A., Ligon, J. B., Erickson, J. R., Ross, R. J. and Forsman, J. W., 2002, “Timber Bridge Evaluation: A Global Non-Destructive Approach Using Impact Generated FRFs.” Proceedings of the IMAC-XX, Los Angeles, US: 15
Yoon, M. K., Heider, D., Gillespie, Jr JW., Ratcliffe, CP. and Crane, RM., 2001, “Local Damage Detection Using a Global Fitting Method on Mode Shape Data.” Proceedings of the IMAC-XIX, Kissimmee, Florida, US: 231~237.
Peterson, S. T., McLean, D. I., Symans, M. D., Pollock, D.G., Cofer, W.F., Emerson, R.N. and Fridley, K., 2001a, “Application of Dynamic System Identification to Timber Beam”: I. Journal of Structural Engineering, 127 (4): 418~425.
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UCI(KEPA) : I410-ECN-0101-2009-550-016694697