Experimental and Analytical Study of Dynamic Behavior of a Bridge
Publication: Journal of Structural Engineering
Volume 123, Issue 11
Abstract
This paper presents and discusses the dynamic behavior of two bridge decks. The experimental tests were performed to explain the dynamic performance of one of them: its vertical displacements and accelerations are appreciably greater than those of every other deck in the same bridge, despite similar geometrical and mechanical properties. The experimental data were used to identify the modal parameters of the decks, which have close frequencies. A simultaneous analysis using a two-degrees of freedom (DOF) model, which exhibits dynamic characteristics similar to the first modes of the deck, was carried out. It showed that, when coupled frequencies occur, the sensitivity of the response to the properties of both the system and the excitation is very high, which may explain the difference in the displacements observed.
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References
1.
Beolchini, G. C. (1995). “Identification of modal parameters of structural systems with close frequencies.”Ingegneria Sismica, Vol. 3, Patron Ed., Bologna, Italy, 35–47 (in Italian).
2.
Beolchini, G. C., and Vestroni, F. (1995). “Identification of dynamic characteristics of base-isolated and conventional buildings.”Proc., 10th Europ. Earthquake Engrg. Conf., Vol. 1, Wien, Austria, 689–695.
3.
Budiwantoro, B., and Jezequel, L. (1990). “Comparison of time domain modal identification methods.”Proc., 8th Modal Anal. Conf., Orlando, Fla., 540–546.
4.
Capecchi, D.(1989). “Difference models for identification of mechanical linear systems in dynamics.”Mechanical Systems and Signal Processing, 3(2), 157–172.
5.
Dragotti, A., Donferri Mitelli, M., and Gennari Santori, A. (1994). “Impact dynamic tests on bridge decks: the Sassofreddo bridge on the Highway A1.”AUTOSTRADE, 2, 92–112 (in Italian).
6.
Ewins, D. J. (1984). Modal testing, theory and practice. John Wiley & Sons, Inc., New York, N.Y.
7.
Ewins, D. J., and Gleeson, P. T.(1982). “A method for modal identification of lightly damped structures.”J. Sound and Vibration, 84(1), 57–79.
8.
Genovese, F., and Vestroni, F. (1994). “Sensitivity of modal quantities around a multiple frequency.”Res. Rep. No. 7/94, DISAT—University of L'Aquila, Italy (in Italian).
9.
Goyder, H. D. G.(1980). “Methods and application of structural modeling from measured frequency response data.”J. Sound and Vibration, 68(2), 209–230.
10.
Huang, D., Wang, T. L., and Shahawy, M.(1993). “Impact studies of multigirder concrete bridges.”J. Struct. Engrg., ASCE, 119(8), 2387–2402.
11.
Ibrahim, S. R.(1983). “Dynamic modeling of structures from measured complex modes.”AIAA J., 21(6), 898–901.
12.
Inbanathan, M. J., and Wieland, M.(1987). “Bridge vibrations due to a vehicle moving over rough surface.”J. Struct. Engrg., ASCE, 113(9), 1994–2008.
13.
Mottershead, J. E., and Friswell, M. I.(1993). “Model updating in structural dynamics.”J. Sound and Vibration, 167(2), 347–375.
14.
Pi, Y. L., and Mickleborough, N. C.(1989). “Modal identification of vibrating structure in the time domain.”Comp. and Struct., 32(5), 1105–1115.
15.
Proceedings of the International Modal Analysis Conferences. (1982–1995)
16.
Vakakis, A. F., and Caughey, T. K.(1991). “A technique for modal identification of interfering modes.”J. Sound and Vibration, 146(3), 361–380.
17.
Wang, T. L., Huang, D., and Shahawy, M.(1992a). “Dynamic response of multigirder bridges.”J. Struct. Engrg., 118(8), 2222–2238.
18.
Wang, T. L., Shahawy, M., and Huang, D.(1992b). “Impact in highway prestressed concrete bridges.”Comp. and Struct., 44(3), 525–535.
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Published In
Journal of Structural Engineering
Volume 123 • Issue 11 • November 1997
Pages: 1506 - 1511
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Nov 1, 1997
Published in print: Nov 1997
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