Modal analysis technique for bridge damage detection

K. C. Chang; Z. Shen; G. C. Lee

doi:10.1061/9780784401316.001

Modal analysis technique for bridge damage detection

K. C. Chang
, Z. Shen
, G. C. Lee

Department of Civil, Structural & Environmental Engineering

National Taiwan University

Research output: Contribution to conference › Paper › peer-review

3 Scopus citations

Abstract

The dynamic responses of a wide-flange steel beam with artificially introduced cracks were studied analytically and experimentally. Frequencies, displacement mode shapes (DMS), and strain mode shapes (SMS) are determined in both the analytical and experimental analyses. Modal damping ratios are also extracted in the experimental study. The sensitivities of the change of the modal parameters due to the damages are studied. The absolute changes in mode shapes were used to determine damage locations. Results show that the damage of a beam can be detected and located by studying the changes in its dynamic characteristics. SMS shows higher sensitivity to local damage than DMS does.

Original language	English
Pages	1-16
Number of pages	16
DOIs	https://doi.org/10.1061/9780784401316.001
State	Published - 1995
Event	Proceedings of the Structures Congress '93 - Irvine, CA, USA Duration: Apr 19 1993 → Apr 21 1993

Conference

Conference	Proceedings of the Structures Congress '93
City	Irvine, CA, USA
Period	04/19/93 → 04/21/93

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10.1061/9780784401316.001

Cite this

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title = "Modal analysis technique for bridge damage detection",

abstract = "The dynamic responses of a wide-flange steel beam with artificially introduced cracks were studied analytically and experimentally. Frequencies, displacement mode shapes (DMS), and strain mode shapes (SMS) are determined in both the analytical and experimental analyses. Modal damping ratios are also extracted in the experimental study. The sensitivities of the change of the modal parameters due to the damages are studied. The absolute changes in mode shapes were used to determine damage locations. Results show that the damage of a beam can be detected and located by studying the changes in its dynamic characteristics. SMS shows higher sensitivity to local damage than DMS does.",

author = "Chang, \{K. C.\} and Z. Shen and Lee, \{G. C.\}",

year = "1995",

doi = "10.1061/9780784401316.001",

language = "English",

pages = "1--16",

note = "Proceedings of the Structures Congress '93 ; Conference date: 19-04-1993 Through 21-04-1993",

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TY - CONF

T1 - Modal analysis technique for bridge damage detection

AU - Chang, K. C.

AU - Shen, Z.

AU - Lee, G. C.

PY - 1995

Y1 - 1995

N2 - The dynamic responses of a wide-flange steel beam with artificially introduced cracks were studied analytically and experimentally. Frequencies, displacement mode shapes (DMS), and strain mode shapes (SMS) are determined in both the analytical and experimental analyses. Modal damping ratios are also extracted in the experimental study. The sensitivities of the change of the modal parameters due to the damages are studied. The absolute changes in mode shapes were used to determine damage locations. Results show that the damage of a beam can be detected and located by studying the changes in its dynamic characteristics. SMS shows higher sensitivity to local damage than DMS does.

AB - The dynamic responses of a wide-flange steel beam with artificially introduced cracks were studied analytically and experimentally. Frequencies, displacement mode shapes (DMS), and strain mode shapes (SMS) are determined in both the analytical and experimental analyses. Modal damping ratios are also extracted in the experimental study. The sensitivities of the change of the modal parameters due to the damages are studied. The absolute changes in mode shapes were used to determine damage locations. Results show that the damage of a beam can be detected and located by studying the changes in its dynamic characteristics. SMS shows higher sensitivity to local damage than DMS does.

UR - https://www.scopus.com/pages/publications/0029191463

U2 - 10.1061/9780784401316.001

DO - 10.1061/9780784401316.001

M3 - Paper

AN - SCOPUS:0029191463

SP - 1

EP - 16

T2 - Proceedings of the Structures Congress '93

Y2 - 19 April 1993 through 21 April 1993

ER -

Modal analysis technique for bridge damage detection

Abstract

Conference

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