Damage detection by means of structural damping identification

Curadelli, Oscar; Riera, Jorge Daniel; Ambrosini, Daniel; Amani, Marta G.

doi:10.1016/j.engstruct.2008.05.024

Cited by 185 publications

(83 citation statements)

References 24 publications

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“…In addition, the cracks in a structure not only affect the structural stiffness [8,22,23] but also lead to variations in the structural damping ratio because of the appearance of plastic zones along the edges of the cracks [21]. Curadelli et al [24] showed the difference in the instantaneous damping coefficient between the healthy and damaged condition of a reinforced concrete beam. They clearly demonstrated that the variation in the damping was considerable and the instantaneous damping coefficients of the undamaged state were lower than of the measured ones at the final loading step with respect to all the vibration amplitudes.…”

Section: Variation In Dampingmentioning

confidence: 99%

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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Section: Variation In Dampingmentioning

confidence: 99%

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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“…Against this backdrop, this study will try to identify structural damage with combined capital of the two parameters, that is the natural frequencies and mode shapes. However, damage detection based on measurement of natural frequencies and mode shapes that ignoring damping, has limitations because it is considered to have a low sensitivity [7].…”

Section: A Structural Damage Detection Studymentioning

confidence: 99%

Structural Damage Detection of A Steel-Truss Railway Bridge Using its Dynamic Characteristics

Susanto

Budipriyanto

2015

IJPS

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AbstractMany steel truss rail bridges in Indonesia were built decades ago. To assure that bridge structure is in-service conditions, periodic monitoring is required, thus structural health of the bridge can be assessed and sudden collapse of the structure can be avoided. In health monitoring of structure, structural damage detection methods are frequently required so that damaged/weak element of the structure can be identified and technique for repairing it can be determined. In this paper, structural damage detection method of steel truss bridge is discussed. The method applied in this study used vibration characteristics of the structure for detecting structural damages occurred in the structure. The method was utilized to identify simulated damages occurred in a steel-truss railway bridge located in Porong East Java. The bridge has span of 30 meters and it was built during the era of Dutch colonization. The structure was modeled numerically utilizing CSI Bridge v15 computer software for facilitating in obtaining its dynamic characteristics. Results of this study showed that the method could identify precisely the existence of damage took place in the structure.

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“…Five damage identification parameters can be highlighted: (i) frequency [28][29][30], (ii) damping [31][32][33], (iii) mode shapes [30,34,35], (iv) accelerations [36][37][38] and (v) curvatures. Curvature methods are usually focused on the mode shape and the deflection [39].…”

Section: Introductionmentioning

confidence: 99%

Damage detection using curvatures obtained from vehicle measurements

O’Brien

Martínez

Malekjafarian

et al. 2017

J Civil Struct Health Monit

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This paper describes a new procedure for bridge damage identification through drive-by monitoring. Instantaneous Curvature (IC) is presented as a means to determine a local loss of stiffness in a bridge through measurements collected from a passing instrumented vehicle. Moving Reference Curvature (MRC) is compared with IC as a damage detection tool. It is assumed that absolute displacements on the bridge can be measured by the vehicle. The bridge is represented by a finite element (FE) model. A Half-car model is used to represent the passing vehicle. Damage is represented as a local loss of stiffness in different parts of the bridge. 1% random noise and no noise environments are considered to evaluate the effectiveness of the method. A generic road surface profile is also assumed. Numerical simulations show that the local damage can be detected using IC if the deflection responses can be measured with sufficient accuracy. Damage quantification can be obtained from MRC.

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Damage detection by means of structural damping identification

Cited by 185 publications

References 24 publications

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

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

Structural Damage Detection of A Steel-Truss Railway Bridge Using its Dynamic Characteristics

Damage detection using curvatures obtained from vehicle measurements

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