Experimental and Analytical Modal Analysis of Steel Arch Bridge
Publication: Journal of Structural Engineering
Volume 130, Issue 7
Abstract
The paper presents the experimental and analytical modal analysis of a steel-girder arch bridge. The field test is carried out by ambient vibration testing under traffic and wind-induced excitations. Both the peak picking method in the frequency domain and the stochastic subspace identification method in the time domain are used for the output-only modal identification. A good agreement in identified frequencies has been found between the two methods. It is further demonstrated that the stochastic subspace identification method provides better mode shapes. The three-dimensional finite element models are constructed and an analytical modal analysis is then performed to generate natural frequencies and mode shapes in the three-orthogonal directions. The finite element models are validated to match the field natural frequencies and mode shapes. It is observed that the finite element Model-2 with the concrete slab provides the greater stiffness in the transverse direction of the bridge. The finite element Model-1 with the lumped masses agrees well with the field tests and can serve as a baseline model of the bridge.
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References
Abdel-Ghaffer, A. M., and Scanlan, R. H.(1985). “Ambient vibration studies of Golden Gate Bridge. I: Suspended structure.” J. Eng. Mech., 111(4), 463–482.
Andersen, P., Brincker, R., and Kirkegaard, P. H. (1996). “Theory of covariance equivalent ARMAV models of civil engineering structures.” Proc., IMAC14, the 14th Int. Modal Analysis Conf., Dearborn, Mich., 518–524.
Bendat, J. S., and Piersol, A. G. (1993). Engineering applications of correlation and spectral analysis, 2nd Ed., Wiley, New York.
De Roeck, G., and Peeters, B. (1999). “Modal analysis on civil engineering constructions.” MACEC2.0, Dept. of Civil Engineering, Catholic Univ. of Leuven, Leuven, Belgium.
De Roeck, G., Peeters, B., and Ren, W. X. (2000). “Benchmark study on system identification through ambient vibration measurements.” Proc., IMAC-XVIII, the 18th Int. Modal Analysis Conf., San Antonio, 1106–1112.
Doebling, S. W., Farrar, C. R., Prime, M. B., and Shevitz, D. W. (1996). “Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review.” Research Rep. No. LA-13070-MS, ESA-EA, Los Alamos National Laboratory, Los Alamos, N.M.
Ewins, D. J. (2000). Modal testing: Theory and practice, Research Studies Press Ltd., Hertfordshire, U.K.
Felber, A. J. (1993). “Development of hybrid bridge evaluation system.” PhD thesis, Univ. of British Columbia, Vancouver, Canada.
Friswell, M. I., and Mottershead, J. E. (1995). Finite element model updating in structural dynamics, Kluwer Academic, Dordrecht, The Netherlands.
Harik, I. E., Allen, D. L., Street, R. L., Guo, M., Graves, R. C., Harison, J., and Gawry, M. J.(1997). “Free and ambient vibration of Brent-Spence Bridge.” J. Struct. Eng., 123(9), 1262–1268.
Harik, I. E., and Ren, W. X. (2001). “Field testing and seismic evaluation of bridges.” Proc., 5th National Workshop on Bridge Research in Progress, Minneapolis, 421–426.
James, G. H., III, Carne, T. G., and Lauffer, J. P.(1995). “The natural excitation technique (NExT) for modal parameter extraction from operating structures.” Int. J. Anal. Exp. Modal Anal., 10(4), 260–277.
Juang, J. N. (1994). Applied system identification, Prentice-Hall, Englewood Cliffs, N.J.
Maia, N. M. M., and Silva, J. M. M., eds. (1997). Theoretical and experimental modal analysis, Research Studies Press Ltd., Hertfordshire, U.K.
Peeters, B. (2000). “System identification and damage detection in civil engineering.” PhD thesis, K.U. Leuven, Belgium.
Ren, W. X., and De Roeck, G.(2002a). “Structural damage identification using modal data. I: Simulation verification.” J. Struct. Eng., 128(1), 87–95.
Ren, W. X., and De Roeck, G.(2002b). “Structural damage identification using modal data. II: Test verification.” J. Struct. Eng., 128(1), 96–104.
Ren, W. X., Harik, I. E., and Blandford, G. E.(2004a). “Roebling suspension bridge. I: FE model and free vibration response.” J. Bridge Eng., 9(2), 110–118.
Ren, W. X., Harik, I. E., Blandford, G. E., Lenett, M., and Baseheart, T. M.(2004b). “Roebling suspension bridge. II: Ambient testing and live load responses.” J. Bridge Eng., 9(2), 119–126.
Van Overschee, P., and De Moor, B. (1996). Subspace identification for linear systems: Theory, implementation and applications, Kluwer, Dordrecht, The Netherlands.
Wilson, E. L., and Habibullah, A. (1998). SAP2000—Structural analysis users manual, Computers and Structures, Inc.
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Copyright © 2004 American Society of Civil Engineers.
History
Received: Feb 14, 2002
Accepted: Oct 9, 2003
Published online: Jun 15, 2004
Published in print: Jul 2004
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