Sensitivity of modal parameters for damage detection in corroded beam elements of the Pescara benchmark

Zuccarino, Luigia; Leonardis, Aleš; Evangelista, Adelia; Valente, C.

doi:10.1088/1742-6596/305/1/012082

Cited by 3 publications

(18 citation statements)

References 13 publications

(11 reference statements)

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“…During examination of the obtained values of modal damping in beams with reinforcement corrosion, their growth in relation to the undamaged condition was observed which is greater than the uncertainty interval and as such applicable to determine the damage caused by corrosion, and more sensitive than determining the natural frequency damage. The research also concluded that a corrosion level of 15% results in a loss of structural stiffness of 5% [52].…”

Section: Research Review and Results Analysismentioning

confidence: 96%

“…L. Zuccarino et al [52] studied the sensitivity and identification of modal parameters in the presence of corrosion damage. Their research was conducted on 3 different groups (T1, T4 and T7) of prestressed beams of identical cross-sectional dimensions and length in the amount of L = 320 cm.…”

Section: Research Review and Results Analysismentioning

confidence: 99%

“…In each group there were five beams, one of which was preserved as undamaged, while the others were with different levels of corrosion, which represented a loss of steel surface in the amount of 3, 5, 6, 10, 12, 15 and 30%. The corrosion process was artificially induced and accelerated and was applied exclusively to the central part of the beam in the length of 192 cm (L c = 0.6L), which represents almost uniform corrosion [52]. The positive maximum value of the natural frequency change in the article [52] is a consequence of the increase of the natural frequencies of higher modal forms which, as shown in the article, are less sensitive to the presence of reinforcement corrosion than the lower modal forms.…”

Section: Research Review and Results Analysismentioning

confidence: 99%

“…The corrosion process was artificially induced and accelerated and was applied exclusively to the central part of the beam in the length of 192 cm (L c = 0.6L), which represents almost uniform corrosion [52]. The positive maximum value of the natural frequency change in the article [52] is a consequence of the increase of the natural frequencies of higher modal forms which, as shown in the article, are less sensitive to the presence of reinforcement corrosion than the lower modal forms. It was also observed that the change in the frequency of the third mode shape at a corrosion level of 10% is approximately 1%, which is considered the limit value for determining damage present due to errors in experimental measurements.…”

Section: Research Review and Results Analysismentioning

confidence: 99%

“…It was also observed that the change in the frequency of the third mode shape at a corrosion level of 10% is approximately 1%, which is considered the limit value for determining damage present due to errors in experimental measurements. As part of the presentation of the results of the article [52], the experimentally determined mode shapes of the undamaged structure were compared with the experimentally determined mode shapes of the structure on which the corrosion of the reinforcement was artificially induced. The obtained values of the MAC criteria were above 0.95, which implies the concordance of mode shapes and the possibility of their use to determine damage caused by corrosion, although in this case it is almost uniform corrosion which is certainly less suitable than local corrosion to determine damage to modal shapes.…”

Section: Research Review and Results Analysismentioning

confidence: 99%

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Damage Assessment of Reinforced Concrete Elements Due to Corrosion Effect Using Dynamic Parameters: A Review

et al. 2021

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Corrosion of reinforcement is one of the main problems related to the durability of reinforced concrete structures. This can cause cracks and a separation of the protective layer, as well as reducing strength and structural stiffness, which can result in numerous human casualties. Visual inspection is a standard method of assessing the condition of reinforced concrete structures whose limitations, such as time, interpretability, accessibility, etc., may affect its effectiveness. Therefore, damage determination methods based on dynamic parameters are becoming more and more prominent in the assessment of damage to reinforced concrete structures. The aim of this paper is to review the literature regarding the determination of corrosion of reinforcement by methods based on dynamic parameters, and to identify future research to develop a method that would detect corrosion problems in time through a continuous system of structural health monitoring.

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Section: Research Review and Results Analysismentioning

confidence: 96%

Section: Research Review and Results Analysismentioning

confidence: 99%

Section: Research Review and Results Analysismentioning

confidence: 99%

Section: Research Review and Results Analysismentioning

confidence: 99%

Section: Research Review and Results Analysismentioning

confidence: 99%

See 3 more Smart Citations

Damage Assessment of Reinforced Concrete Elements Due to Corrosion Effect Using Dynamic Parameters: A Review

et al. 2021

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Challenges in assessing corrosion damage in reinforced concrete beams by vibration-based monitoring: literature analysis and experimental study

Vandecruys

Vereecken

Anastasopoulos

et al. 2023

Structural Health Monitoring

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Corrosion is one of the most frequently occurring problems in reinforced concrete (RC) structures. The formation of rust products results in deterioration processes that decrease the durability and structural capacity. Therefore, frequent inspection and monitoring of corrosion damage play a vital role in establishing reliable asset management of civil structures. Vibration-based monitoring (VBM) is particularly useful in studying the global response of a deteriorated structure, since a change in modal characteristics may indicate damage. Although VBM has already been studied thoroughly, a systematic understanding of how corrosion contributes to the changes in modal characteristics is still lacking. In this study, an overview and assessment of the existing literature for dynamic tests on corroded RC beams is provided, aiming to give a critical review of the current knowledge, possibilities and challenges related to this topic. Moreover, this study presents additional data from two test programmes, which enable to point out the challenges in VBM of corroding RC beams. The experimental test programmes include two locally corroded beams and three uniformly corroded beams, as well as non-corroding reference beams. For high corrosion levels, the natural frequencies of beams reported in the literature, as well as the beams of the test programmes, decreased. However, comparison with a non-corroding reference beam proved to be essential to eliminate the influence of other non-negligible factors such as creep and shrinkage. Other modal characteristics, such as the damping ratio and mode shapes, are found to be less sensitive to monitor uniform or local corrosion in RC beams.

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Preliminary results on acoustic emission and vibration-based monitoring of locally corroded reinforced concrete beams

Vandecruys¹,

Martens²,

Steen³

et al. 2022

eJNDT

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The current tendency to increase the lifetime of reinforced concrete (RC) structures creates concerns about their serviceability and safety. Reinforcement corrosion is the most common deterioration process in RC, which can severely decrease the structural capacity. Corrosion causes a reduction of the rebar’s cross section, cracking and spalling of the concrete cover due to the expansion of the corrosion product and a decrease of the bond strength at the reinforcement-concrete interface. Assessing the structural capacity of corroded existing structures remains an important issue to maintain good safety and to achieve more targeted repairs. On-site quantification of structural reliability requires advanced non-destructive techniques to evaluate the damage and efficient methods for structural health monitoring. This paper presents the initial results of an experimental campaign on corroding RC beams. Beams with a length of 3 m are subjected to local accelerated corrosion while being monitored with the acoustic emission (AE) technique and dynamic vibration testing (DVT). AE investigates the damage progress and underlying causes of the cracks. When cracks are formed, the stress redistribution in the material causes elastic waves, which can be recorded by piezoelectric transducers placed on the surface of the beam. Examination of the waveforms allows for a localization and characterization of the damage source. Additionally, DVT observes the change in modal parameters of the beams, measured by accelerometers. These changes can be related to a loss of stiffness in the structure, resulting in a perception of the decrease in structural capacity. The combination of local (AE) and global (DVT) monitoring techniques improves the damage inspection as both the damage process and the loss of stiffness are observed. The results of AE provides information when the cracks have not yet reached the surface, while DVT is most relevant when severe damage already occurred. After corrosion, a four-point bending test is performed to evaluate the remaining structural capacity.

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Sensitivity of modal parameters for damage detection in corroded beam elements of the Pescara benchmark

Cited by 3 publications

References 13 publications

Damage Assessment of Reinforced Concrete Elements Due to Corrosion Effect Using Dynamic Parameters: A Review

Damage Assessment of Reinforced Concrete Elements Due to Corrosion Effect Using Dynamic Parameters: A Review

Challenges in assessing corrosion damage in reinforced concrete beams by vibration-based monitoring: literature analysis and experimental study

Preliminary results on acoustic emission and vibration-based monitoring of locally corroded reinforced concrete beams

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