Safety Assessment of Bridge Structures Using Ambient Vibration

Abstract:

In this study, relative load-carrying capacity (RLC) evaluation system in which the change of load-carrying capacity of a bridge structure can be estimated through the variation of the dynamic property, which is induced by the stiffness change due to the deterioration of the bridge, by using ambient traffic-induced vibration was proposed. The system uses the natural excitation technique in conjunction with the eigensystem realization algorithm for identification of modal parameters. Indoor test using a truss-typed model bridge and field measurement were performed to verify the suggested system and it was shown that the RLC estimation system is suitable for the safety assessment of bridge structures in a simple and efficient manner.

• Periodical: Advances in Science and Technology (Volume 83)
• Pages: 151-156
• DOI: https://doi.org/10.4028/www.scientific.net/AST.83.151
• Online since: September 2012
• Authors: Chin Hyung Lee, Young Jun You, Ki Tae Park, Bong Chul Joo, Bo Mi Lee, Tae Heon Kim
• Keywords: Bridge Structures, Dynamic Propertry, Relative Load-Carrying Capacity, Safety Assessment

References

[1] D.F. Giraldo, W. Song, S.J. Dyke, J.M. Caicedo, Model identification through ambient vibration: comparative study, J. Eng. Mech. 135 (2009) 759-770.

DOI: 10.1061/(asce)0733-9399(2009)135:8(759)

[2] C.R. Farrar, G.H. James III, System identification from ambient vibration measurements on a bridge, J. Sound Vib. 205 (1997) 1-18.

DOI: 10.1006/jsvi.1997.0977

[3] S.W. Doebling, C.R. Farrar, M.B. Prime, A summary review of vibration-based damage identification methods, Shock Vib. Dig. 30 (1998) 91-105.

DOI: 10.1177/058310249803000201

[4] G.H. James III, T.G. Carne, J.P. Lauffer, The natural excitation technique for modal parameter extraction from operating wind turbines, Sandia Report, SAND92-1666, UC-261, Sandia National Laboratories, Sandia, N. M, (1993).

DOI: 10.2172/10123989

[5] J.M. Caicedo, S.J. Dyke, E.A. Johnson, Natural Excitation Technique and Eigensystem Realization Algorithm for Phase I of the IASC-ASCE Benchmark Problem: Simulated Data, J. Eng. Mech. 130 (2004) 49-60.

DOI: 10.1061/(asce)0733-9399(2004)130:1(49)

[6] J.N. Juang, R.S. Pappa, An eigensystem realization algorithm for modal parameter identification and model reduction, J. Guid. Control Dyn. 8 (1985) 620–627.

DOI: 10.2514/3.20031