Signal versus Noise in Damage Detection by Experimental Modal Analysis
Publication: Journal of Structural Engineering
Volume 123, Issue 2
Abstract
Remote bridge-monitoring systems based on measured structural vibration have been perceived to be able to assist in bridge inspection for future. Sensitivity of measured modal properties to potential damage is very critical for their practical application, which is examined here. Modal tests were conducted on a one-sixth scale multiple steel-girder model bridge and a fracture critical field bridge, including both intact and simulated damage states. Sensitivity of modal parameters to changes of structural condition was studied using statistical methods (for frequencies, damping ratios, mode shapes, and their derivatives). Results show that, even though modal frequencies and mode shapes may be used to identify the existence of commonly observed bridge damage with certain sensitivity, it is difficult to identify their locations.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Alampalli, S., Fu, G., and Dillon, E. W. (1995). “Measured bridge vibration for damage detection.”Res. Rep., FHWA/NY/RR-95/165, Engineering Research and Development Bureau, New York State Department of Transportation, Albany, N.Y.
2.
Biswas, M., Pandey, A. K., and Samman, M. M.(1990). “Diagnostic experimental spectral/modal analysis of a highway bridge.”Int. J. Analytical and Experimental Modal Anal., 5(1), 33–42.
3.
Box, G. E. P., Hunter, W. G., and Hunter, J. S. (1978). Statistics for experiments. John Wiley & Sons, Inc., New York, N.Y.
4.
Castelluci, J. (1988). “Crack in bridge shuts down Rte. 95.”Providence J. Bull., Providence, R.I.
5.
Ewins, D. J. (1984). Modal testing: theory and practice. John Wiley & Sons, Inc., New York, N.Y.
6.
Hearn, G., and Testa, R. B.(1991). “Modal analysis for damage detection in structures.”J. Struct. Engrg., ASCE, 117(10), 3042–3063.
7.
Highways Accident Rep. (1988). “Collapse of New York Thruway (I-90) bridge over the Schoharie Creek near Amsterdam, New York, April 5, 1987.” National Transportation Safety Board, Washington, D.C.
8.
Lieven, N. A. J., and Ewins, D. J. (1988). “Spatial correlation of mode shapes, the Coordinate Modal Assurance Criterion (COMAC).”Proc., 6th Int. Modal Anal. Conf., Society for Experimental Mechanics, Bethel, Conn., 690–695.
9.
Manual of steel construction. (1980). American Institute of Steel Construction Inc., 8th Ed., Chicago, Ill.
10.
Mazurek, D. F., and DeWolf, J. T.(1990). “Experimental study of bridge monitoring technique.”J. Struct. Engrg., ASCE, 116(9), 2532–2549.
11.
National bridge inspection standards: frequency of inspection and inventory. (1987). Department of Transportation: Federal Highway Administration, Federal Register, Washington, D.C.
12.
Pandey, A. K., Biswas, M., and Samman, M. M.(1991). “Damage detection from changes in curvature mode shapes.”J. Sound and Vibration, 145(2), 321–332.
13.
Richardson, M. H., and Formenti, D. L. (1985). “Global curve fitting of frequency response measurements using the rational fraction polynomial method.”Proc., 3rd Int. Modal Anal. Conf., Society for Experimental Mechanics, Inc., Bethel, Conn., 390–397.
14.
Wolf, T., and Richardson, M. (1989). “Fault detection in structures from changes in their modal parameters.”Proc., 7th Int. Modal Anal. Conf., Society for Experimental Mechanics, Inc., Bethel, Conn., 87–94.
Information & Authors
Information
Published In
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Feb 1, 1997
Published in print: Feb 1997
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.