Damage Detection at Welded Joint of Two-Dimensional Plane Model

  • Received : 2011.07.15
  • Published : 2011.12.30


Damage detection algorithms based on a one-dimensional beam model can detect damage within a beam span caused by flexure only but cannot detect damage at a joint with prescribed boundary conditions or at the middle part of a beam section where the neutral axis is located. Considering the damage at a welded joint of beam elements in steel structures and modeling the damage with twodimensional plane elements, this study presents a new approach to detecting damage in the depth direction of the joint and beam section. Three damage scenarios at the upper, middle, and lower parts of a welded joint of a rectangular symmetric section are investigated. The damage is detected by evaluating the difference in the receptance magnitude between the undamaged and damaged states. This study also investigates the effect of measurement locations and noise on the capability of the method in detecting damage. The numerical results show the validity of the proposed method in detecting damage at the beam's welded joint.


Joint;Damage Detection;Mode Shape;FRF;Flexural Performance;Shear Performance


  1. Adewuyi, A.P., Wu, Z. & Serker, N.H.M.K. (2009) "Assessment of vibration-based damage identification methods using displacement and distributed strain measurements." Structural Health Monitoring, 8: 443-461.
  2. Alampalli, S., Fu, G. & Dillon, E.W. (1997) "Signal versus noise in damage detection of experimental modal analysis." Journal of Structural Engineering, 123: 237-245.
  3. Cornwell, P., Doebling, S.W. & Farrar, C.R. (1999) "Application of the strain energy damage detection method to plate-like structures." Journal of Sound and Vibration, 224(2): 359-374.
  4. Cruz, P.J.S. & Salgado, R. (2008) "Performance of vibration-based damage detection methods in bridges." Computer-Aided Civil And Infrastructure Engineering, 24: 62-79.
  5. Doebling, S.W., Peterson, L.D., & Alvin K.F. (1998) "Experimental determination of local structural stiffness by disassembly of measured flexibility matrices." Journal of Vibration and Acoustics, 120: 949-957.
  6. Kim, J.T. & Stubbs, N. (1995) "Model Uncertainty and Damage Detection Accuracy in Plate-Girder Bridges." Journal of Structural Engineering, 121(10): 1409-17.
  7. Kim, J.T., Ryu, Y.S., Cho, H.M. & Stubbs, N. (2003) "Damage identification in beam-type structures:frequency-based method vs. mode-shape-based method." Engineering Structures, 25: 57-67.
  8. Pandey, A.K., Biswas, M. & Samman M.M. (1991) "Damage detection from changes in curvature mode shapes." Journal of Sound and Vibration, 145: 321-332.
  9. Peterson, S.T., McLean, D.I., Symans, M.D., Pollock, D.G., Cofer, W.F., Emerson, R.N. & Fridley, K.J. (2001a) "Application of dynamic system identification to timber beams I." Journal of Structural Engineering, 127(40): 418-425.
  10. Peterson, S.T., McLean, D.I., Symans, M.D., Pollock, D.G., Cofer, W.F., Emerson, R.N. & Fridley, K.J. (2001B) "Application of dynamic system identification to timber beams II." Journal of Structural Engineering, 127(4): 426-432.
  11. Rahmatalla, S. & Eun, H.C. (2010) "A damage detection approach based on the distribution of constraint forces predicted from measured flexural strain." Smart Materials and Structures, 19 105016.
  12. RRucevskis, S., Wesolowski, M. & Chate, A. (2009) "Vibration-based damage detection in a beam structure with multiple damage locations." Aviation, 13(3): 61-71.
  13. Shi, Z.Y., Law, S.S. & Zhang, L.M. (1998) "Structural damage localization from modal strain energy change." Journal of Sound and Vibration, 218(5): 825-844.
  14. Shi, Z.Y., Law, S.S. & Zhang, L.M. (2000b) "Structural damage detection from modal strain energy change." Journal of Engineering Mechanics, 126(12): 1216-1223.
  15. Shih, H.W., Thanbriatnam, D.P. & Chan, T.H.T. (2009) "Vibration based structural damage detection in flexural members using multi-criteria approach." Journal of Sound and Vibration, 323(3-5): 645-661.
  16. Soyoz, S. & Feng, M.Q. (2008) "Instantaneous damage detection of bridge structures and experimental verification." Structural Control and Health Monitoring, 15(7): 958-973.
  17. Yoon, M.K., Heider, D., Gillespie, J.W., Ratcliffe, C.P. & Crane, R.M. (2010) "Local damage detection with the global fitting method using operating deflection shape data." Journal of Nondestructive Evaluation., 29(1): 25-37.