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

Duvnjak, Ivan; Klepo, Ivan; Serdar, Marijana; Damjanović, Domagoj

doi:10.3390/buildings11100425

Cited by 11 publications

(7 citation statements)

References 40 publications

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“…The change in mode shapes was not discussed in the literature references, possibly because mostly uniform corrosion damage was induced, which is expected to have a minor effect on the mode shapes, or because of an insufficient amount of accelerometers. A change in modal damping ratio might also indicate corrosion, 24,48,50 even though some of the previous studies have found the modal damping ratio to be less reliable for damage quantification. 46,47,62 The tests in Section 'Experimental program' confirmed the latter statement, as no correlation was found between the CL and modal damping ratio.…”

Section: Comparison Between the Literature And Experimental Resultsmentioning

confidence: 99%

“…Although vibration-based assessment of corroding RC structures seems promising, only few studies have investigated the effect of reinforcement corrosion in concrete on the modal characteristics. An overview of studies focusing on corrosion in RC was given by Duvnjak et al, 24 which illustrates that most experimental studies are performed in laboratory conditions. Hence, the present study mainly discusses laboratory tests.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Comparison Between the Literature And Experimental Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…VBM is a more global technique which detects variations in structural stiffness based on modal characteristics [16,17]. Since corrosion causes a decrease in stiffness, VBM can be applied to detect corrosion damage in RC structures [18]. The corrosion damage is mainly portrayed by decreases in natural frequency [19,20].…”

Section: Introductionmentioning

confidence: 99%

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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“…Among these, reinforcement corrosion is one of the most frequent causes, which seriously affects RC structures [1][2][3][4]. As shown in Figure 1, reinforcement corrosion seriously undermines the serviceability and structural performance of an RC structure [5]. Among major causes of reinforcement corrosion are chloride and carbonation, which result from atmospheric or environmental conditions, such as oceans, de-icing salts, and pollution.…”

Section: Introductionmentioning

confidence: 99%

Structural Performance Degradation of Corrosion-Damaged Reinforced Concrete Beams Based on Finite Element Analysis

2022

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The impact of the seismic performance of corrosion-damaged reinforced concrete (RC) members on the overall seismic performance of the entire RC structure must be investigated. Related research results provide important guidance for a more accurate seismic performance evaluation of RC structures with corroded members including beams and columns. However, currently available technologies for the seismic evaluation of existing RC structures do not consider the impact of reinforcement corrosion-induced deterioration on the seismic performance of RC members. The main focus of this study is on proposing a practical methodology to evaluate the seismic performance of such buildings. More specifically, the proposed methodology enables a direct quantitative evaluation of seismic performance by estimating the structural performance based on the strength and deformation capacity of corroded members. In pursuit of this research background and the objectives, our research team first performed an experimental study to estimate the impact of reinforcement corrosion on the structural behavior of RC shear beams and flexural beams and determine the factors associated with structural performance deterioration. A high correlation between the half-cell potential (HCP) before and after reinforcement corrosion of RC beams and the structural performance degradation factor based on the energy absorption capacity has been seen previously. In this study, a finite element analysis (FEA) was conducted, in which bond strength loss between rebar and concrete due to reinforcement corrosion of beam members was considered as one of the aging-related degradation factors, and the correlation between structural performance degradation before and after corrosion in beam members was studied. In addition, we compared and analyzed the results of the previous experimental research and FEA conducted in this study and proposed a structural performance degradation factor as a function of corrosion of shear and flexural beams. The research results indicate that the FEA-derived bonding factor (β) and performance degradation factor (ϕ) of flexural beam can be approximated with the equation ϕ = (0.36 − β)−1 + 101 (R2 = 0.94), together with β–mV (average potential difference in voltage) correlation mV = (1.36 −β)/(0.018 − 0.05β) In the case of shear beams, FEA resulted in ϕ = 37.3β + 63, which enables regression approximation, showing a high correlation (R2 = 0.98), together with β–mV correlation (mV = 932.5β − 1075). Using the mV–β–ϕ correlation curves, the bonding factor (β) depending on the degree of corrosion of RC beam members and the performance degradation factor (ϕ) based on the consequent strength-deformation capacity can be evaluated.

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

Cited by 11 publications

References 40 publications

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

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

Structural Performance Degradation of Corrosion-Damaged Reinforced Concrete Beams Based on Finite Element Analysis

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