Vibration-Based Monitoring of Prestress-Loss in PSC Girder Bridges

PSC 거더교의 진동기반 긴장력 손실 모니터링

  • Published : 2008.02.28


A vibration-based monitoring system is newly proposed to predict the loss of prestress forces in prestressed concrete (PSC) girder bridges. Firstly, a global damage alarming algorithm is newly proposed to monitor the occurrence of prestress-loss by using the change in frequency responses. Secondly, a prestress-loss prediction algorithm is selected to estimate the extent of prestress-loss by using the change in natural frequencies. Finally, the feasibility of the proposed system is experimentally evaluated on a scaled PSC girder model for which acceleration responses were measured for several damage scenarios of prestress-loss.


  1. Adams, R.D., Cawley, P., Pye, C.J., Stone, B.J. (1978) A Vibration Technique for Non-destructively Assessing the Integrity of Structures, Journal of Mechanical Engineering Science, 20, pp. 93-100
  2. Doebling, S.W., Farrar, C.R., Prime, M.B. (1998) A summary review of vibration-based damage identification methods, The Shock Vibration Digest, 30(2), pp.91-105
  3. Saiidi, M., Douglas, B., Feng, S. (1994) Prestress force effect on vibration frequency of concrete bridges, Journal of Structure Engineering, 120, pp.2233-2241
  4. Stubbs, N., Osegueda, R. (1990) Global nondestructive damage evaluation in solids, International Journal of Analytical and Experimental Modal Analysis, 5(2), pp.67-79
  5. Miyamoto, A., Tei, K., Nakamura, H., Bull, J.W. (2000) Behavior of prestressed beam strengthened with external tendons, Journal of Structural Engineering, 126, pp.1033-1044
  6. Law, S.S., Lu, J.R. (2005) Time domain responses of a prestressed beam and prestress identification, Journal of Sound and Vibration, 288(4-5), pp. 1011-1025
  7. Yi, J. H., Yun, C. B. (2004) Comparative Study on Modal Identification Methods using Output-only Information, Structural Engineering and Mechanics, 17(3-4), pp.445-446
  8. Saiidi, M., Shield, J., O'connor, D., Jutchens, E. (1996) Variation of prestress force in a prestressed concrete bridge during the first 30 months, PCI Journal, 41, pp.66-72
  9. Bendat, J.S., Piersol, A.G. (1993), Engineering applications of correlation and spectral analysis, Wiley, USA
  10. Brinker, R., Zhang, L., Andersen, P. (2001) Modal Identification of output-only Systems using frequency Domain Decomposition, Smart Materials and Structures, 10, pp.441-445
  11. Kim, J.T., Ryu, Y.S., Cho, H.M., Stubbs, N. (2003a) Damage identification in beam-type structures: frequency-based method vs mode-shapebased method, Engineering Structures, 25, pp.57-67
  12. Lin, T.Y. (1963) Design of Prestressed Concrete Structures, John Wiley & Sons, USA
  13. Kim, J.T., Stubbs, N. (1995) Improved Damage identification Method based on Modal Information, Journal of Sound and Vibration, 259(1), pp. 57-67
  14. Kim, J.T., Yun, C.B., Ryu, Y.S., Cho, H.M. (2003b) Identification of prestress-loss in PSC beams using modal information, Structural Engineering and Mechanics, 17(3-4), pp.467-482
  15. Nawy, E.G. (1996) Prestress Concrete - A Fundamental Approach, Prentice Hall, USA