Hybrid health monitoring of prestressed concrete girder bridges by sequential vibration-impedance approaches

Kim, Jeong-Tae; Park, Jae-Hyung; Hong, Dong-Soo; Park, Woo-Sun

doi:10.1016/j.engstruct.2009.08.021

Cited by 100 publications

(82 citation statements)

References 22 publications

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“…The results of the most relevant experimental investigations (Saiidi et al 1994;Kim et al 2010;Zhang 2007;) are summed up in Figs. 1 and 2.…”

Section: Experimental Testsmentioning

confidence: 99%

“…It would thus be highly desirable to have tools and procedures capable of estimating the actual loss of prestressing. Besides other emerging methods (Bartoli et al 2009;Kim et al 2010;Lan et al 2012), dynamic identification techniques have proved to be economical, quick and reliable in order to evaluate structural integrity (Salawu 1997). Nevertheless, as far as the influence of prestressing on the dynamic properties of PRC elements is concerned, the debate is still on going.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed numerical modeling of dynamic behavior of PRC beams has been applied to several experimental investigations, results of which are available in literature (Saiidi et al 1994;Kim et al 2010;Zhang 2007;) in order to check correctness of assumptions made in numerical modeling. Nevertheless, direct application of the proposed method is not viable since the parameters e sh and a that describe the correction of concrete stress-strain relationship (which takes into account the concrete microcracking) are unknown.…”

Section: Identification Of the Unknown Parametersmentioning

confidence: 99%

“…From this figure, it can be argued that for very high prestressing force concrete softening becomes predominant with very small increments of the 1st frequency of vibration. Kim et al In 2007Kim et al (2010 tested a T-shaped girder having an overall height of 0.6 m and a clear length of 6.0 m simply supported by thin rubber pads. A 0.6 in.…”

Section: Comparison With Tests Bymentioning

confidence: 99%

“…Inversely, the natural frequency decreased after the cracks produced by the prestressing forces occurred in the beams. Kim et al (2010) tested a laboratory-scaled PRC girder for several damage scenarios of prestress loss in the tendon. Starting from a state of no prestress loss, the external prestressing force has been gradually reduced to Zero.…”

Section: Experimental Testsmentioning

confidence: 99%

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On the Evaluation of Prestress Loss in PRC Beams by Means of Dynamic Techniques

Breccolotti

2018

Int J Concr Struct Mater

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In the last few decades, prestressing techniques have been used to build very important structures and infrastructures. Since the serviceability and the safety of prestressed reinforced concrete (PRC) elements rely on the effective state of prestressing, development of tools and procedures capable of estimating the effective prestress loss would be very useful. Amongst other techniques, dynamic identification has proved to be an economical, quick and reliable method to evaluate structural integrity. However, the influence of prestressing in the dynamic behavior of PRC elements is not completely clear. In fact, while many references in the literature state that the prestressing force does not affect the frequencies of vibration, almost every experimental test carried out on PRC beams shows an increase in the eigenfrequencies for increasing value of the prestressing force. This paper aims to contribute to the debate, investigating the dynamic behaviour of PRC beams taking into account properties, such as nonlinearity, softening, confinement and micro-cracking of concrete subjected to compression and tension stress states, and the variation of the flexural stiffness of the PRC beam along its length according to bending stress distribution. Non-linear discrete modelling, in combination with system identification and optimization was used to define the dynamic properties of PRC beams, taking into account the effect of prestressing level. The proposed model was applied to four PRC beams with known mechanical and dynamic properties in literature. The influence of the prestressing force on the trend of frequencies of vibration was closely captured for each beam, with errors less than 3% of the estimated frequencies. The results of this investigation thus indicate that dynamic identification techniques can potentially be used to identify the prestressing force level, and consequently the prestress loss, provided the complete concrete mechanics is taken into account.

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“…The results of the most relevant experimental investigations (Saiidi et al 1994;Kim et al 2010;Zhang 2007;) are summed up in Figs. 1 and 2.…”

Section: Experimental Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Identification Of the Unknown Parametersmentioning

confidence: 99%

Section: Comparison With Tests Bymentioning

confidence: 99%

Section: Experimental Testsmentioning

confidence: 99%

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On the Evaluation of Prestress Loss in PRC Beams by Means of Dynamic Techniques

Breccolotti

2018

Int J Concr Struct Mater

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Identification of bridge cable force damage based on Bayesian inference

Chen,

Zheng,

Chu

et al. 2023

Engineering Reports

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Bridge cable is an important force transmission component of bridge, but it is easy to be damaged during service, such as fatigue damage and corrosion damage, which seriously threatens the safety of bridge structure. Therefore, it is necessary to identify damage of cable force. Generally, the damage of cable force can be identified by the change of cable frequency. This paper establishes a cable force damage identification model based on Bayesian inference and uses Metropolis‐Hastings (MH) algorithm to solve the posterior probability function of unknown parameter. In the Bayesian inference model, the influence of the priori function of unknown parameters on the posterior probability distribution model is discussed. In the MH algorithm, the influence of different proposed distributions (Normal distribution, Gamma distribution and Weibull distribution) on the sampling results is discussed based on three numerical simulation studies, and the influence of burned sample proportion on the establishment of a posteriori distribution function is analyzed. Furthermore, the influence of monitoring noise data and missing data on cable force damage identification is considered, and the robustness of the proposed method is analyzed.

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RBFN-based temperature compensation method for impedance monitoring in prestressed tendon anchorage

Huynh

Kim

2018

Struct Control Health Monit

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Summary In this study, a temperature compensation method based on radial basis function network (RBFN) is developed to monitor damage‐induced impedance signatures in prestressed tendon anchorages under temperature variation. First, an impedance monitoring technique via a piezoelectric interface device is outlined for prestress‐loss detection in the tendon anchorage system. Second, an RBFN‐based algorithm is designed to filter out the temperature‐induced variation in impedance signatures for damage monitoring. Finally, the feasibility of the proposed algorithm is verified for the prestress‐loss monitoring in the test structure under the temperature‐varying condition. A series of impedance measurements are conducted for the temperature‐varying and prestress force‐varying conditions. The RBFN‐based algorithm is used to train a set of baseline impedance signatures for varying temperatures, and also to quantify damage‐induced impedance signatures of the test structure. The effect of the size of RBFN training patterns on the accuracy of the proposed temperature compensation algorithm is also evaluated.

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Hybrid health monitoring of prestressed concrete girder bridges by sequential vibration-impedance approaches

Cited by 100 publications

References 22 publications

On the Evaluation of Prestress Loss in PRC Beams by Means of Dynamic Techniques

On the Evaluation of Prestress Loss in PRC Beams by Means of Dynamic Techniques

Identification of bridge cable force damage based on Bayesian inference

RBFN-based temperature compensation method for impedance monitoring in prestressed tendon anchorage

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