Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

Vibration-Based Damage Monitoring in Model Plate-Girder Bridges under Uncertain Temperature Conditions

불확실한 온도 조건하의 모형 강 판형교의 진동기반 손상 모니터링

  • Park, Jae-Hyung (Department of Ocean Engineering, Pukyong National University) ;
  • Hong, Dong-Soo (Department of Ocean Engineering, Pukyong National University) ;
  • Cho, Hyun-Man (Department of Ocean Engineering, Pukyong National University) ;
  • Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National University)
  • Published : 2008.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

A vibration-based damage-monitoring scheme is proposed that would generate an alarm showing the occurrence and location of damage under temperature-induced uncertainty conditions. Experiments on a model plate-girder bridge are described, for which a set of modal parameters was measured under uncertain temperature conditions. A damage-alarming model is formulated to statistically identify the occurrence of damage by recognizing the patterns of damage-driven changes in the natural frequencies of the test structure and by distinguishing temperature-induced off-limits. A damage index method based on the concept of modal strain energy is implemented in the test structure to predict the location of damage. In order to adjust for the temperature-induced changes in the natural frequencies that are used for damage detection, a set of empirical frequency correction formulas is analyzed from the relationship between the temperature and frequency ratio.

Keywords

References

  1. 류정선, 윤정방 (1987). “랜덤파랑하중에 대한 Guyed Tower의 동적거동해석”, 한국해양공학회지, 제1권, 제1호, pp 57-64
  2. 김정태, 윤재웅, 백종훈 (2003). “강판형의 진동모드특성에 미치는 온도의 영향”, 한국해양공학회지, 제17권, 제6호, pp 58-64
  3. Cornwell, P., Farrar, C.R., Doebling, S.W. and Sohn, H. (1999). “Environmental Variability of Modal Properties”, Experimental Techniques, Vol 23, No 6, pp 45-48
  4. Farrar, C.R., Cornwell, P.J., Doebling, S.W. and Prime, M.B. (2000). Structural Health Monitoring Studies of the Alamosa Canyon and 1-40 Bridges, Los Alamos National laboratory Report, LA-13635-MS
  5. Kim, J.T., Park, J.H. and Kim, W.J. (2005). “Vibration-based Structural Health Monitoring under Uncertain Temperature Conditions”, Safety and Reliability of Engineering Systems and Structures (ICCESAR 2005), Rome, pp 2921-2928
  6. Kim, J.T., Ryu, YS., Cho. HM. and Stubbs, N. (2003). “Damage Identification in Beam-Type Structures: Frequency-Based Method Vs Mode-Shape-Based Method”, Engineering Structures, Vol 25, No 1, pp 57-67 https://doi.org/10.1016/S0141-0296(02)00118-9
  7. Kim, J.T. and Stubbs, N. (1995). “Model-Uncertainty Impact and Damage-Detection Accuracy in Plate Girder”, Journal of Structural Engineering, ASCE, Vol 121, No 10, pp 1409-1417 https://doi.org/10.1061/(ASCE)0733-9445(1995)121:10(1409)
  8. Kim, J.T. and Stubbs, N. (2002). “Improved Damage Identification Method Based on Modal Information”, Journal of Sound and Vibration, Vol 252, No 2, pp 223-238 https://doi.org/10.1006/jsvi.2001.3749
  9. Kim, J.T. and Stubbs, N. (2003). “Nondestructive Crack Detection Algorithms for Full-Scale Bridges”, Journal of Structural Engineering, ACSE, Vol 129, No 10, pp 1358-1366 https://doi.org/10.1061/(ASCE)0733-9445(2003)129:10(1358)
  10. Kim, J.T., Yun, CB. and Yi, J.H. (2003). “Temperature Effect on Frequency-Based Damage Detection in Plate-Girder Bridges”, KSCE Journal of Civil Engineering, Vol 7, No 6, pp 725-733 https://doi.org/10.1007/BF02829141
  11. Montgomery, D'C, (1997). Introduction to Statistical Quality Control, John Wiley & Sons Inc., New York
  12. Peeters, B. (2000). System Identification and Damage Detection in Civil Engineering, Ph.D, Thesis, Katholieke Universiteit Leuven
  13. Peeters, B. and De Roeck, G. (2000). “One-Year Monitoring of the Z24-Bridge: Environmental Influences Versus Damage Events”, Proc. of The 18th IMAC, San Antonio, TX, USA, pp 1570-1576
  14. Schalkoff, R. (1992). Pattern Recognition-Statistical, Structural and Neural Approaches, John Wiley & Sons Inc., New York
  15. Sohn, H, Czarnecki, J.J. and Farrar, C.R. (2000). “Structural Health Monitoring using Statistical Process Control”, Journal of Structural Engineering, ASCE, Vol 126, No 11, pp 1356-1363 https://doi.org/10.1061/(ASCE)0733-9445(2000)126:11(1356)
  16. Sohn, H., Farrar, C.R., Hemez, F.M., Shucnk, D.D., Strnemates, D.W. and Nadler, B.R. (2003). “A review of structural health montiroing literature: 1996-2001”, LA-13976, Los Alamos National laboratory, Los Alamos