Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2007.2404.2413BagchiAshutoshJag HumarAhmed Noman122007717Vibration based damage identification in a structure is based on the observation that damage causes changes in its dynamic characteristics, such as, frequencies and mode shapes. There are a number of Vibration Based Damage Identification (VBDI) algorithms which utilize change in vibration characteristics in a structure to determine the location and severity of possible damage. This article presents the development of a Finite Element (FE) program that implements the three dimensional beam and plate-shell elements and some of the vibration based damage identification algorithms. The FE system developed herein is also capable of performing model updating using the measured modal parameters such the natural frequencies and mode shape vectors. A three span continuous bridge in Canada has been presented as a case study. The three dimensional FE model of the bridge was correlated to the actual structure by updating the model with modal test data and the updated model is used for damage identification using simulated damage scenarios. The finite element system developed herein has been found to be robust and the VBDI algorithms, in spite of their sensitivity to incomplete modes and measurement noise, provide important clues about the location and severity of damage in a structure.]]>Allman, D.J.,1984Bakht, B. and A. Mufti,1998Batoz, J.L., K.J. Bathe and L.W. Ho,1980Bagchi, A.,2005Cheng, J.J.R. and S. Afhami,1999COSMOS/M,1995Gill, P.E., W. Murray and M.H. Wright,1981Humar, J.L., A. Bagchi and H. Xu,2003Humar, J.L., A. Bagchi and H. Xu,2006Kabe, A.M.,1985MATLAB,2006O`Callahan, J., P. Avitabile and R. Riemer,1989Stubbs, N., J.T. Kim and C.R. Farrar,1995Ventura, C.E., T. Onur and R.C. Tsai,2000Zienkiewicz, O.C. and R.L. Taylor,1989