Damage Identification Using Modal Data: Experiences on a Prestressed Concrete Bridge

Huth, Olaf; Feltrin, Glauco; Maeck, Johan; Kilic, Nedim; Motavalli, Masoud

doi:10.1061/(asce)0733-9445(2005)131:12(1898)

Cited by 156 publications

(92 citation statements)

References 16 publications

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“…Despite the fact that mode shapes contain local information, one of the problems that persist is that the mode shape is not particularly sensitive to small levels of damage [15].…”

Section: Introductionmentioning

confidence: 99%

An investigation into the acceleration response of a damaged beam-type structure to a moving force

González

Hester

2013

Journal of Sound and Vibration

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Publication information Journal of Sound and Vibration, 332 (13): 3201-3217Publisher Elsevier Item record/more information http://hdl.handle.net/10197/6212 Publisher's statementThis is the author's version of a work that was accepted for publication in Journal of Sound and Vibration. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Sound and Vibration (VOL 332, ISSUE 13, (2013) that did not appear in the healthy structure is present in the response of the damaged structure. This paper elucidates from first principles how the acceleration response can be assumed to consist of 'static' and 'dynamic' components, and where the beam has experienced a localised loss in stiffness, an additional 'damage' component. The combination of these components establishes how the damage singularity will appear in the total response.For a given damage severity, the amplitude of the 'damage' component will depend on how close the damage location is to the sensor, and its frequency content will increase with higher velocities of the moving force. The latter has implications for damage detection because if the frequency content of the 'damage' component includes bridge and/or vehicle frequencies, it becomes more difficult to identify damage. The paper illustrates how a thorough understanding of the relationship between the 'static' and 'damage' components contributes *Manuscript Click here to download Manuscript: Manuscript RevC.doc Click here to view linked References 2 to establish if damage has occurred and to provide an estimation of its location and severity.The findings are corroborated using accelerations from a planar finite element simulation model where the effects of force velocity and bridge span are examined.

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“…Despite the fact that mode shapes contain local information, one of the problems that persist is that the mode shape is not particularly sensitive to small levels of damage [15].…”

Section: Introductionmentioning

confidence: 99%

An investigation into the acceleration response of a damaged beam-type structure to a moving force

González

Hester

2013

Journal of Sound and Vibration

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“…During the past few decades, the correlations between the vibrational characteristics and temperature changes have attracted considerable interest in technical literature and have been investigated using different approaches such as numerical analysis via finite element (FE) methods [9,10], laboratory tests [8,11], and monitoring approaches in civil structures [1,12,13].…”

Section: Shock and Vibrationmentioning

confidence: 99%

“…So far, only a few studies have monitored the changes in the structural responses of fullscale bridges considering environmental effects [1,12,13]. Cornwell et al reported that the first three natural frequencies of the Alamosa Canyon Bridge varied by approximately 4.7, 6.6, and 5.0% during a 24 h period as the temperature of the bridge deck changed by approximately 22 ∘ C [12].…”

Section: Laboratory Test Approachmentioning

confidence: 99%

“…Over the years, many studies have been performed on the application of dynamic responses and damage detection [1][2][3][4][5][6][7] in terms of the natural frequencies, mode shapes, modal curvature, and high-order mode shape derivative. A recent study demonstrated that natural frequencies, mode shapes, and damping ratios are invariant in structures [1].…”

Section: Introductionmentioning

confidence: 99%

“…A recent study demonstrated that natural frequencies, mode shapes, and damping ratios are invariant in structures [1]. Thus, the health of a structure is correlated to the changes in its modal parameters.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long-Term Vibration Monitoring of the Effects of Temperature and Humidity on PC Girders with and without Fly Ash considering ASR Deterioration

Fukada

Torii

2017

Shock and Vibration

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Structural responses have been used as inputs in the evaluation procedures of civil structures for years. Apart from the degradation of a structure itself, changes in the environmental conditions affect its characteristics. For adequate maintenance, it is necessary to quantify the environment-induced changes and discriminate them from the effects due to damage. This study investigates the variation in the vibration responses of prestressed concrete (PC) girders, which were deteriorated because of the alkali-silica reaction (ASR), concerning ambient temperature and humidity. Three PC girders were exposed to outdoor weather conditions outside the laboratory, one of which had a selected amount of fly ash in its mixture to mitigate the ASR. The girders were periodically vibration tested for one and a half years. It was found that when the temperature and humidity increased, the frequencies and damping ratios decreased in proportion. No apparent variation in the mode shapes could be identified. A finite element model was proposed for numerical verification, the results of which were in good agreement with the measured changes in the natural frequencies. Moreover, the different dynamic performances of the three specimens indicated that the fly ash significantly affected the vibrations of the PC girders under ASR deterioration.

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System‐ und Schadensidentifikation von Betontragstrukturen

Strauß¹,

Bergmeister²,

Wendner³

et al. 2008

Beton‐Kalender 2009

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Damage Identification Using Modal Data: Experiences on a Prestressed Concrete Bridge

Cited by 156 publications

References 16 publications

An investigation into the acceleration response of a damaged beam-type structure to a moving force

An investigation into the acceleration response of a damaged beam-type structure to a moving force

Long-Term Vibration Monitoring of the Effects of Temperature and Humidity on PC Girders with and without Fly Ash considering ASR Deterioration

System‐ und Schadensidentifikation von Betontragstrukturen

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