Damage, nondestructive evaluation and rehabilitation of FRP composite-RC structure: A review

Li, Dongsheng; Zhou, Junlong; Ou, Jinping

doi:10.1016/j.conbuildmat.2020.121551

Cited by 60 publications

(15 citation statements)

References 126 publications

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“…Some methods, such as visual inspection, dragging-chain and knock methods, do not need to use special equipment. Other methods, such as thermal imaging, acoustic emission, ultrasonic waves, radiation, modal analysis and load tests, are more complex and require specific equipment [6,7,[12][13][14][15][16][17][18]. According to the analysis of previous research results , the scope of the applications and functions are different among these methods (Table 2).…”

Section: Nondestructive Inspections Of Frp Bridgesmentioning

confidence: 99%

“…Therefore, it is necessary to maintain and manage bridges and take various technical measures to prolong their service life. The evaluation of material properties and the inspection of FRP structures have received a great deal of attention [12][13][14][15][16][17][18]. Here, the techniques for the maintenance and inspection of FRP bridges are reviewed.…”

Section: Introductionmentioning

confidence: 99%

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Maintenance and Inspection of Fiber-Reinforced Polymer (FRP) Bridges: A Review of Methods

Tang

2021

Materials

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Fiber-reinforced polymers (FRPs) are materials that comprise high-strength continuous fibers and resin polymer, and the resins comprise a matrix in which the fibers are embedded. As the technique of FRP production has advanced, FRPs have attained many incomparable advantages over traditional building materials such as concrete and steel, and thus they play a significant role in the strengthening and retrofitting of concrete structures. Bridges that are built out of FRPs have been widely used in overpasses of highways, railways and streets. However, damages in FRP bridges are inevitable due to long-term static and dynamic loads. The health of these bridges is important. Here, we review the maintenance and inspection methods for FRP structures of bridges and analyze the advantages, shortcomings and costs of these methods. The results show that two categories of methods should be used sequentially. First, simple methods such as visual inspection, knock and dragging-chain methods are used to determine the potential damage, and then radiation, modal analysis and load experiments are used to determine the damage mode and degree. The application of FRP is far beyond the refurbishment, consolidation and construction of bridges, and these methods should be effective to maintain and inspect the other FRP structures.

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Section: Nondestructive Inspections Of Frp Bridgesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Maintenance and Inspection of Fiber-Reinforced Polymer (FRP) Bridges: A Review of Methods

Tang

2021

Materials

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“…The application of smart piezoelectric transducers (PZT) for the structural health monitoring (SHM) of FRP composite RC structures is a relatively innovative method since some studies have been already developed in this area [ 10 , 11 , 12 , 13 , 14 ]. However, in the case of NSM FRP technique, the number of studies is practically non-existent [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Performance of Linear Mixed Models to Assess the Effect of Sustained Loading and Variable Temperature on Concrete Beams Strengthened with NSM-FRP

Perera

Torres

Díaz

et al. 2021

Sensors

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Although some extended studies about the short-term behavior of NSM FRP strengthened beams have been carried out, there is a lack of knowledge about the behavior of this kind of strengthening under sustained loads and high service temperatures. Electromechanical impedance method formulated from measurements obtained from PZT patches gives the ability for monitoring the performance and changes experienced by these strengthened beams at a local level, which is a key aspect considering its possible premature debonding failure modes. This paper presents an experimental testing program aimed at investigating the long-term performance of a concrete beam strengthened with a NSM CFRP laminate. Long term performance under different levels of sustained loading and temperature conditions is correlated with EMI signatures processed using Linear Mixed-effects models. These models are very powerful to process datasets that have a multilevel or hierarchical structure as those yielded by our tests. Results have demonstrated the potential of these techniques as health monitoring methodology under different conditions in an especially complex problem such as NSM-FRP strengthened concrete structures.

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“…The failure modes of fiber‐reinforced concrete structure are more complex 30–32 . The damage inspection and health assessment need better development and application of non‐destructive monitoring technology 33,34 . The debonding of concrete and fiber bars is a main failure mode, and the response of AE activity is obviously related to the evolution of debonding damage 35 .…”

Section: Introductionmentioning

confidence: 99%

“…[30][31][32] The damage inspection and health assessment need better development and application of non-destructive monitoring technology. 33,34 The debonding of concrete and fiber bars is a main failure mode, and the response of AE activity is obviously related to the evolution of debonding damage. 35 The study of Shan et al 36 also proved that the debonding damage process can be classified according to the characteristic of AE activity.…”

mentioning

confidence: 99%

Visual damage identification of concrete cylinders with steel‐fiber‐reinforced composite bars based on acoustic emission

Guo

Chen

Tang

et al. 2021

Structural Contr & Hlth

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Steel-fiber-reinforced composite bar (SFCB) is a composite bar composed of a crescent-rib steel bar and an outer protruded fiber-reinforced polymer (FRP) layer. Due to its unique post-yield stiffness and superior anti-corrosion behavior, the SFCB is except to be an ideal reinforcement for concrete structures subject to a high corrosion environment. For SFCB-reinforced concrete cylinders, their internal damage mechanism has never been experimentally studied but was usually speculated with the brittle failure due to the potential brittle fracture of the SFCB. To reveal the compression damage mechanism of SFCBreinforced concrete cylinders, a uniaxial compression test for SFCB-reinforced concrete cylinders was carried out at first. The entire damage process of SFCBreinforced concrete cylinders was monitored in real-time by acoustic emission (AE), a widely used nondestructive testing method. The test result shows that the SFCB-reinforced concrete cylinders fail after the buckling of longitudinal SFCB or the fracture of the stirrup. The intensity signal analysis of AE proves the failure mode of the SFCB-reinforced concrete cylinder was close to a plastic failure instead of a brittle failure. Furthermore, a new damage visualization method is proposed to analyze the internal damage of the concrete cylinders by using the spatial b value of AE. The T value was constructed by combining the spatial b value with the density distribution of AE events. It is proven that the T value is highly sensitive to the serious damages of the concrete cylinders and can be used to identify the damage locations inside the concrete cylinders.acoustic emission, concrete cylinder, damage identification, steel-fiber-reinforced composite bar, uniaxial compression | INTRODUCTIONSteel-fiber-reinforced composite bar (SFCB) is a type of composite bar developed almost a decade ago. 1 It is composed of a crescent-rib steel bar and an outer protruded fiber-reinforced polymer (FRP) layer, as shown in Figure 1. SFCB has a good bonding property with concrete 2,3 and is excepted to be an ideal reinforcement for concrete structures subject to the high earthquake risk area or the high corrosion environment due to its unique post-yield stiffness and superior anti-corrosion behavior. 1,4,5

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Damage, nondestructive evaluation and rehabilitation of FRP composite-RC structure: A review

Cited by 60 publications

References 126 publications

Maintenance and Inspection of Fiber-Reinforced Polymer (FRP) Bridges: A Review of Methods

Maintenance and Inspection of Fiber-Reinforced Polymer (FRP) Bridges: A Review of Methods

Performance of Linear Mixed Models to Assess the Effect of Sustained Loading and Variable Temperature on Concrete Beams Strengthened with NSM-FRP

Visual damage identification of concrete cylinders with steel‐fiber‐reinforced composite bars based on acoustic emission

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